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Timbren

Timbren Rear Suspension Enhancement System

7167 Reviews | 95 Questions
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8,600-lb Capacity. These hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use. Great Prices for the best vehicle suspension from Timbren. Timbren Rear Suspension Enhancement System part number TDR2500D can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension

Highlights

  • Custom Fit for Your Vehicle: Mounts to existing attachment points
  • 8,600-lb Load Support: Keeps your truck level and stable when towing or hauling heavy gear.
  • Reduces Sag and Squat: Hollow rubber springs stiffen under load to maintain ride height.
  • Improves Handling and Safety: Minimizes body roll and sway for better steering and braking control.
  • No-Maintenance Design: Installs in place of bump stops with no air lines or adjustments to manage.
  • Smoother Ride Over Bumps: Rubber springs absorb shock to protect your suspension on rough roads.

Features to know about

Keep the Rear Level and Stable: 8,600-lb Suspension Support

Heavy trailers and bed loads can push the rear of your truck down and lift the front, throwing off handling and braking. The Timbren Rear Suspension Enhancement System adds up to 8,600 lbs of extra support above the rear axle to keep things level. The hollow rubber springs sit about 1 inch above the axle when unloaded and progressively stiffen as weight is added. That means a smoother ride when empty, and firm, controlled support when loaded so steering, braking, and headlight aim stay right where they should.

Truck bed sagging under heavy load showing rear axle compression before Timbren suspension enhancement is installed

Diagram showing Timbren rear suspension spring installed above axle with one inch clearance when unloaded and compressed when loaded

Ride Smooth Over Rough Roads: Rubber Springs that Absorb Shock

Bumps, dips, and uneven pavement are easier to handle when the rubber springs take the hit instead of your suspension. Each Aeon hollow spring compresses under load to cushion impacts and reduce harsh jolts before they reach the frame. By acting as shock absorbers for the rear end, they help prevent bottoming out on rough roads and cut down on wear to your factory suspension.

Truck driving on a rough road showing how Timbren rear suspension absorbs shocks for smoother ride and prevents bottoming out

Stay Steady in Crosswinds and Turns: Independent Spring Action

When a trailer sways or a curve tries to push you off line, each spring works on its own to steady that side of the vehicle. The independent action helps control body roll during sharp turns or swerves, keeps off-center or uneven loads from leaning the truck, and calms trailer sway faster after wind gusts or passing traffic.

Towing vehicle with swaying trailer demonstrating improved control and stability with Timbren suspension system

Timbren suspension reducing truck body roll and squat for improved cornering stability and off-center load handling

Simple Bolt-On Upgrade: No Air Lines or Drilling Needed

Installing load support doesn’t have to mean running hoses or wiring compressors. This system bolts directly onto existing frame mounts using vehicle-specific brackets and hardware. It replaces the factory bump stops with no drilling required. Once mounted, the springs need no adjustments or maintenance—just reliable support every time you hitch up or haul heavy cargo.

Specs

Weight and Capacity

  • Capacity: 8,600 lbs

Included Components

  • Includes: 2 Aeon hollow rubber springs
  • Includes: Vehicle-specific brackets and hardware for simple installation

Installation

  • Replaces: Axle bump stops on frame
  • Drilling required: No drilling required

Compatibility and Usage

  • Designed to work with: A suspension system that is in good working order
  • Do not exceed: The vehicle's weight-carrying capacity

Warranty

  • Warranty: Limited lifetime warranty - satisfaction guarantee

DR2500D - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Item # TDR2500D

Installation Details TDR2500D Installation instructions

This Product Fits The Following Vehicles






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Ratings & Reviews

4.7

7165 reviews
5 Stars
(5770)
4 Stars
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3 Stars
(205)
2 Stars
(129)
1 Star
(193)
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8,600-lb Capacity. These hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use.

by:

Worked as advertised used them this weekend highly recommended got to me fast only took about 30 minutes to assemble and install

Fernando profile picture

Fernando

3/24/2026

Still going strong better then Airbags have had both performance wise timbres are better



by:

Took longer to read the instructions and clean then grease off my arm (which I got from rubbing against the lower shock mount), than it did to install. The drivers side is SIMPLE, the passengers side is a bit more tricky, because on the 2014 RAM 2500, the right side mount is directly ahead of the upper suspension torsion bar mount, so it's tough to get a wrench in there. I have a 15mm curved thin wrench, which worked perfectly! I've attached photos of both sides, so that you can see what I mean.

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by:

It went on with out much trouble. I only gave it 4 stars because I just got it today and got it put on but I have not put it under load yet or road test yet.



by:

Installed on 21 Ram 2500. With spacers and no load, springs were engaged resulting in super stiff ride. Took spacers out, that gave about 1/2" gap. With no load ride quality was back to factory. A home modified 16mm wrench is needed for the rear bolt on both sides. Install took about 1 hour, including removing the spacers. Have used these on previous pickup, always satisfied.



by:

They work and seem to work well, but definitely make the ride stiffer and do get a bit of bounce-back reaction.



by:

because I haul a Truck Camper I needed something to reduce rocking, Works great.



by:

These things work as advertised. Quick and easy installation. Hundreds of dollars cheaper than airbag. can ride a little rough.



by:

This product made all the difference in hauling our truck camper!! The sway/rocking is gone and the ride is so much smoother!! They were so easy to install and even better than we had hoped!



by:

Very easy install, did not need to raise vehicle, had plenty of room. 2025 Ram 2500, no spacer needed, 1in space.



by:

Good customer service. Thank you!



by:

Great system works great, USPS lost the 1st shipment, Dietrich from Etrailer, worked on seeing where it was then sending me a new shipment. HIGHLY RECOMMEND Etrailer and commend Dietrich for going above and beyond



by:

Easy install. Lifted truck by hitch to stretch suspension and installed new set. Pulling as fifth well got rid of the bounce.



by:

I’ve installed them on my truck but haven’t had the opportunity to haul my fifth wheel yet. Plan on making a trip towards the end of March so we’ll see how they perform. It was an easy install by removing tire and removing existing bump stops and replaced with the overloads. Box was torn open and I was worried parts may be missing but all was good



by:

Been a good upgrade to keep my truck stable and not sagging when I am hauling or towing. Works great hauling my Lance 825 truck camper.

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Gwendolyn Y. profile picture
Etrailer Expert

Gwendolyn Y.

3/26/2025

Where're you off to next, Mike?



by:

I started out with a little trouble. The parts shipped to me came in a broken box, and some parts were missing. I returned them through the mail, and a trailer sent me another sat right away. They stood behind their product well.

The bump stops, fit my truck very well, but I did have to come up with some bolts to mount their plate to my truck as the ones on the truck were much too long.

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by:

Bought these for a 2017 Ram 1500 for a more stable ride and was impressed. So much, that I Bought a second set for my 2021 Ram 2500. Now, even though it's a lil firmer ride, I wouldn't hesitate to purchase these again

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Etrailer Expert

Brooke M.

12/14/2024

Thats awesome to hear, Steven! Its good seeing how much these can make a difference for someone hauling a heavy load! Timbren should make you a spokesperson ;)



by:

Easy installation great with a trailer attached however can be a harsh ride with no load.

Lazer S. profile picture
Etrailer Expert

Lazer S.

3/24/2026

Glad you like them, Chuck! Well, mostly anyway. I do hear these can be harsh when unloaded and it is probably the only real complaint we get about them. They definitely do one heck of a job when you are loaded up though! How often are you towing? And what do you typically tow?



by:

Got these installed in about 45 min on RAM 2500. Because I started mounting them with the wrong bolt first. Start off with the bolt going into the slot first. But I have made three trips so far and I can tell a much smoother ride. Highly recommend. They have worked great for me

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by:

Was an easy install and seems to helping the truck ride more level while towing



by:

Keeps my Ram 2500 from squatting as much when towing my travel trailer, would buy again. Easy to install too.



by:

These were a nightmare to pur 0n a 2018 ram 2500. What a pain. I had to make a tool to tighten the new bumpstops on. Still have extra bolts. Im apprehensive.



by:

Put passenger side mounting plate on 1st using rear bolt. Tighten bolt to snug, turn plate counter-clockwise, attach Timbren, rotate clockwise into position, put 2nd bolt and tighten, tighten 1st bolt with wrench. 30 minutes. Hope to remove sway on my 2025 ram 2500. Bed dropped 1" on both sides with 2200 lb. truck camper on board. Did not use spacer. About 1 in. gap as recommended. Rode normal over bumpy local roads! Ty Etrailer! Ty Timbren! Ty Joann And shipping! A+++



by:

Installed on 2026 Ram 2500 Laramie. Had problems during the install. The rear bolt on the passenger side Timbren, almost impossible to tighten once you put the Timbren on. There is a support structure located within inches allowing extremely limited space. Removal of the bump stops was easy.
I had watched the video and you will notice there is an antisway bar mount, right behind the passenger side Timbren you are mounting.
I went and purchased the closed end ratchet wrenches. When I put the screws on for the passenger side, it was very tricky. I went into the wheel well and turned the Timbren slighty with the front portion I pivoted on the rear bolt towards the drivers side. I then tightened the rear Timbren bolt, best I could, used an extension from a ratchet, to pivot the Timbren in place and put the other bolt in. I then used the closed end ratchet, to tighten, ONE CLICK AT A TIME, the rear bolt. I would move the wrench until it clicked. Take it off, move the inside of the ratchet wrench, ONE CLICK, then put it back on, move until one click was heard and repeated that until the bolt was tight.
There is NO WAY to use an open end wrench. You MUST HAVE a closed end ratchet wrench to put these on.

Timbren, if you are listening, please, please modify this design as the passenger side rear bolt is almost impossible to tighten.

It was only by the Grace of God, I was able to figure out how to get the closed end ratchet wrench to do one click at a time to get the bolt tightened.
If you are installing on a Ram 2500, be patient and have the ratcheting closed end wrenches. It was 16mm.

Attaching the left side and rights of finished install of 2026 Ram 2500 Laramie.

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by:

I was in a rush to get something on my truck to keep the back end from sagging. I pull a 24ft enclosed trailer. Around #7000.
And I pull a lot. We race twice a weekend around Indiana and I only drive the truck when it’s hooked to the trailer. I think if you only pulled occasionally this would be a great option. But the ride is stiff when it’s on the overloads because that’s how it works. I really should switch over to air bags to make the ride less harsh. But for the money these do exactly what they say and they’ll last forever. This my second set. I had them on my 1500 with a 20’ trailer before. They’re just as good on the 2500.
If you pull daily/weekly get air bags. If you’re only pulling once in a while these will do the job just fine.



by:

If you have a truck bed camper and coil springs in the rear these are a must. I went for sail boat at 40 mph to 75 mph in gusty wind no problem! Completely eliminated the sway!


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See what our Experts say about this Timbren Vehicle Suspension

  • Do Timbren Jounce Springs Work With Shocks Already Installed On 2018 Ram 2500 4X4?
    Good morning Michael, yes they are only made to supplement existing factory suspension on your 2018 Ram 2500 4x4. The Timbren Rear Suspension Enhancement System # TDR2500D get added in place of your existing bump stops on your truck's real axle, adding some reinforcement and support so that your suspension doesn't sag and get worn out as quickly. Are you towing full time, or is this just going to be towing the camper for some parts of the year, then go unloaded for the rest of the year?...
    view full answer...
  • What Options Do I Have To Reduce Road Shock On My Ram 2500 When Towing?
    Hey Lonny, The Timbren Suspension Enhancement # TDR2500D for your vehicle is going to be great at better absorbing the shock when towing so it is less noticeable. I am not too familiar with the Bilstein Shocks but I imagine that paired with the Timbrens is going to do nothing but help. Airbags are going to help more with and tilt or roll you feel so I agree going with the Timbren is the way to go. That kit I mentioned is a custom fit kit so no drilling is required. Has your Ram been...
    view full answer...
  • Recommended Suspension Upgrade for a 2022 Ram 2500 w/ Factory Air Ride
    Hey Joseph. Since your 2022 Ram 2500 has the factory air suspension, I recommend adding the Timbren Rear Suspension Enhancement System item # TDR2500D. These progressive rate springs install where your bump stops are currently mounted. The more weight you put on them the more they will engage and support your truck's suspension. What kind of 5th wheel trailer do you have?
    view full answer...
  • Will Timbren Rear Suspension Enhancement System Add Ride Height When Towing ?
    Hello Shawn, thanks for reaching out. The Timbren Rear Suspension Enhancement System # TDR2500D will fit the 2025 Ram 2500. Since you have a 4" lift you will need a few 1" spacers # A25723-90AH00 to compensate. These will not necessarily add any ride height when towing your 5th wheel, but they will prevent the truck from sagging as much, so it may ride slightly higher than it did before. Keep in mind if spacers are used, you will need to source longer bolts locally.
    view full answer...
  • 2016 Ram Power Wagon Towing Capacity and Rear Helper Spring Recommendations
    According to Ram the 2016 Power Wagon has a towing capacity of 9,800 pounds. The trailer you choose cannot weigh more than this when loaded and ready to tow. If it is a Laramie Power Wagon it is rated for a max of 12,450 pounds. And if it is a Tradesman Power Wagon it is rated for 12,650 pounds. For your 2016 Ram Power Wagon I recommend adding Timbren springs # TDR2500D which will fit 2- or 4-wheel drive models with or without overload springs. These springs will prevent the rear of the...
    view full answer...
  • Is Timbren Or SumoSprings The Better Option For Occasional Towing?
    Hi Paul! Since you said occasional towing, I am going to steer you away from the Timbren option. They can be pretty rough and you will definitely feel it when you are not towing. If you had a constant load, it would have been an option, but I don't think you will be happy with them. The SumoSprings Solo Custom Helper Springs - Rear Axle # SSR-312-54 will be the much better choice. Yes, it does have a lower capacity than the Timbrens, but I believe they are much better suited to your needs....
    view full answer...
  • Which Timbren Kit Fits 2018 Ram 2500 and is Best Option
    Hey David, I basically never recommend the severe service Timbren kits like the part # TDRTT3500E that fits your 2018 Ram 2500 unless the vehicle will basically be always towing at or near it's capacity since they are very harsh. So instead I would go with the part # TDR2500D for your truck.
    view full answer...
  • How to Decrease Vehicle Sag and Improve Ride Quality on a 2014 Ram 2500
    I have the perfect option that will give your 2014 Ram 2500 both comfort and support but the Timbren Rear Suspension Enhancement System part # TDR2500D are prone to creating a stiff ride. I cannot guarantee whether or not you will experience this discomfort but if the springs are loaded then the chances of a stiff ride are high. For the best of both worlds (support/comfort), I recommend using a set of airbags like the Firestone Ride-Rite Air Helper Springs part # F2598. This airbag kit...
    view full answer...
  • Will Timbren Kit for 2022 Ram 2500 Power Wagon
    Hey Timothy, the Timbren rear suspension kit part # TDR2500D that fits your 2022 Ram 2500 will get rid of the sag when towing if you replaced your bump stops with these. Since that's a pretty large amount of suspension drop I would make sure you aren't attempting to tow beyond the towing capacities of your truck.
    view full answer...
  • Will The Timbren Severe Service Kit TDRTT3500E Make Ride Rough When Unloaded
    Hey John, thanks for getting in touch. The brackets that come with the Timbren Suspension Enhancement Kit # TDRTT3500E are custom fitted for the 2020 Ram 2500, and there is no shorter bracket we can offer for this kit. The # TDRTT3500E kit is a severe service kit. It is intended for vehicles that have a constant heavy load in the bed like a slide in camper or salt spreader. They will do great when under a load, but they are going to be very rough when unloaded. They are really not designed...
    view full answer...
  • Will The Timbren SES # TDR2500D Fit On A 2021 Ram 2500 Power Wagon
    Hey Brit, Yes, the Timbren Rear Suspension Enhancement System # TDR2500D would be a fit for your 2021 Ram 2500 Power Wagon. These jounce springs have a 8,600lb load leveling capacity so I do want to warn you that the ride will be pretty stiff when you are loaded down. Something a bit lower capacity-wise like the SumoSprings Solo Custom Helper Springs # SSR-312-54 would still get the job done but wouldn't affect your unloaded ride quality as much.
    view full answer...
  • Can Timbren SES and SuperCoils Be Installed Together on 2021 Ram 2500
    Hey Paul; you can install the # TDR2500D and # SSC-52 at the same time on your 2021 Ram 2500. The SuperCoils replace your OEM coil springs and the Timbren SES replaces the factory bump stop so they're in two different locations and won't interfere with each other.
    view full answer...
  • How do I Know How Much Weight my Gooseneck Horse Trailer Can Handle?
    Hey Terry, thanks for reaching out! Your trailer GVWR is the max weight that your trailer can be when it's fully loaded. Since the trailer weighs in at 7,560 lbs at empty and you're loading up 2,950 lbs of horses, it means you'll be overloading your trailer. I'd be interested to know what the year/make/model is of your gooseneck horse trailer. I find it odd that the GVWR only allows 1,430 lbs to be added to the trailer, especially since horses aren't necessarily light creatures. What...
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  • Comparing SumoSprings to Timbren for 2021 Ram 2500
    The SumoSprings like the Rebel Custom Helper Springs - 2 Piece - Rear Axle # SS27GR and the Timbren # TDR2500D are almost the same height. The Timbren is 6-3/4" tall and the SumoSprings are approximately 7" tall with the brackets. Since these install in the same space there won't be much difference between the two when it comes to the fit. Based on that information, I would still choose the SumoSprings # SS27GR over the Timbren. The Timbren will be far more rigid with its design and 8,600...
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  • How to Reduce Sway on a 2016 Ram 2500 with a Lance 820 Truck Camper
    With how the Firestone Air Helper Springs, like the # F2706, will attach to the frame, you would not be able to install a Timbren # TDR2500D as well. Both of these options will mount in the same place, unfortunately. That being said, the # TDR2500D may be better for your situation than the air bags. I do typically suggest air bags as they are fully adjustable, but they can be a little lacking when under constant heavy load and are not as good at handling sway problems. Another upgrade...
    view full answer...
  • Recommended Suspension Enhancement for 2019 Ram 2500 Towing 5th Wheel
    For your 2019 Ram 2500 I recommend the SumoSprings Solo Custom Helper Springs - Rear Axle # SSR-312-54 over the Timbren # TDR2500D. The reason is the difference in the impact on your unloaded ride quality. The SumoSprings have a weight capacity of 2,800 lbs which is more than enough based on your pin weight. Compare these to the Timbren with a capacity of 8,600 lbs. The Timbren is going to be a lot stiffer and I don't think you'll be happy with them installed when you aren't towing. The...
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  • Recommended Suspension Enhancement for a 2020 Ram 2500 Power Wagon Allowing For Articulation
    Personally I feel the SumoSprings Rebel Custom Helper Springs # SS64VR are going to give you the best of both worlds for providing support when towing while not reducing any articulation on your 2020 Ram 2500 Power Wagon. It has a 2 piece design which allows your suspension to fully unload off road. As these are constructed of a microcell urethane they are able to compress more than Timbren Springs # TDR2500D made from the harder rubber. The Timbren springs would create more noticeable...
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  • Recommended Timbren Suspension Enhancement for 5th Wheel Towing with a 2015 Ram 2500 4x4
    Yes, the Timbren suspension enhancement system (SES) jounce-style springs will help to level your 2015 Ram 2500 when you are under a load. The correct part you want to use is # TDR2500D as the other part for the rear suspension, part # TDRTT3500E, is designed for service vehicles that are under a constant heavy load. I have attached a review video for the Timbrens as well as a photo that a customer sent in of this same system installed on their 2014 Ram 2500 for you to reference. One...
    view full answer...
    Image 1 for
  • Rear Suspension Enhancement Springs For A 2022 RAM 2500 With Factory Air Suspension
    Yes, The Timbren Rear Suspension Enhancement System # TDR2500D will fit your 2022 RAM 2500 with factory air suspension. The Roadmaster Sway Bar # RM-1129-135 will not. The Timbrens will give you up to an additional 8,600 pounds of suspension support. These springs act like shock absorbers, taking the brunt of bumps and rough roads. Using these springs will not exceed the vehicle's weight-carrying capacity. I attached an installation video link below.
    view full answer...
  • Are Spacers Needed For Timbren Suspension Enhancement on 2022 Ram 2500 Power Wagon
    If you're saying the space where the Timbren would install is 7" you wouldn't need a spacer. About an inch gap is what is recommended, and the Timbren # TDR2500D for your truck measures 5-3/4" in overall height. A 1" spacer is included which would make it 6-3/4". We do have the spacers though, the # TA25722-90P00 is the 1/2" and the # A25723-90AH00 is the 1". I would go ahead and measure to be sure. If it is 7" you could leave the spacer off or if you want them to engage sooner add a...
    view full answer...
  • Which Timbren SES Do I Need for a 2017 Ram 2500
    The difference between the Timbren # TDR2500D and the # TDRTT3500E is that the TDRTT3500E are designed for commercial service trucks which will have a more beefy suspension system already and a slightly different frame. The TDR2500D is designed for the passenger vehicles like your 2017 Ram 2500, so this would be the Timbren SES you're looking for. Whether or not you have the off-road package on your 2017 Ram 2500 won't have any effect on which Timbren system you're using, so there's nothing...
    view full answer...
  • Suspension Enhancement For 2021 Ram 2500 With Air Suspension
    To beef up your 2021 Ram 2500's rear suspension, the only thing you can add on are jounce stop replacements, and the heftiest of those is the Timbren Rear Suspension Enhancement System # TDR2500D. These have a robust 8,600 lb capacity and are definitely not weak, and will engage if you find the rear is bouncing too much for how you use your truck.
    view full answer...
  • Will Timbren Rear Suspension Enhancement TDR2500D Fit A 2018 Ram 2500 W/ 50 Gallon Aux Fuel Tank
    Yes the Timbren Rear Suspension Enhancement # TDR2500D you were looking at for your 2018 Ram 2500 will fit perfectly. They will be slightly compressed with your Titan 50 Gallon Fuel Tank full, but that is to be expected as that is quite a bit of weight. This is going to be a great option for you as the 8600lb rating of these helper springs will help keep your truck from sagging when you have the extra fuel tank full, and especially when you are hooked up to your 5th wheel trailer. I included...
    view full answer...
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  • Will Timbrens Help With Reducing Roll on 2022 Ram 2500 When Towing 5th Wheel
    Yes, body roll and stability will be improved on your 2022 Ram 2500 when you are towing a 5th wheel trailer after installing the Timbrens that fit your truck, which are the following part number: - Timbren Rear Suspension Enhancement System # TDR2500D They do fit with your rear air suspension, and engage when needed to counteract both sag and body roll to help level your Ram, stabilize it, and combat sway.
    view full answer...


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Test Fit:
Ryan G
Employee Jesse B
Test Fit:
Jesse B

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