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Kodiak Disc Brake Kit - 10" Rotor - 5 on 4-1/2 - Stainless Steel - 3,500 lbs

Kodiak Disc Brake Kit - 10" Rotor - 5 on 4-1/2 - Stainless Steel - 3,500 lbs

Item # K2R35S

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Kodiak Disc Brakes - K2R35S
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  • Disc Brakes
  • 3500 lbs Axle
  • Rotor
  • 14 Inch Wheel
  • 14-1/2 Inch Wheel
  • 15 Inch Wheel
  • Kodiak
  • Brake Set
  • 5 on 4-1/2
Trailer disc brake kit includes 2 assemblies with rustproof, stainless steel rotors; calipers; and mounting brackets. Assemblies fit 3,500-lb axles and 14" and larger wheels. The 10" rotor features a 5 on 4-1/2 bolt pattern. Lowest Prices for the best trailer brakes from Kodiak. Kodiak Disc Brake Kit - 10" Rotor - 5 on 4-1/2 - Stainless Steel - 3,500 lbs part number K2R35S can be ordered online at or call 800-298-8924 for expert service.

  • All Info
  • Reviews (6)
  • Q & A (27)
  • Videos (3)
  • Photos
  • Why etrailer?

Kodiak Trailer Brakes - K2R35S

Trailer disc brake kit includes 2 assemblies with rustproof, stainless steel rotors; calipers; and mounting brackets. Assemblies fit 3,500-lb axles and 14" and larger wheels. The 10" rotor features a 5 on 4-1/2 bolt pattern.


  • Brake assemblies make it easy to change from an idler axle to a disc brake axle
  • Disc brakes deliver better performance than drum brakes
    • More consistent stopping, even at highway speeds
    • Dramatically shorter stopping distance
  • Maintenance costs are lower than for drum brakes
    • Fewer moving parts to maintain, repair and replace
  • Stainless steel construction is durable and rustproof - ideal for extended marine use
    • 1,000-Hour salt-spray rating
  • Slip-on, over-the-hub rotors
    • Fit over standard idler hub and are held in place by wheel and wheel bolts
    • Remove easily for maintenance
      • No need to replace entire hub-and-rotor assembly if only hub or rotor becomes damaged
    • Increase distance from hub face to hub face by 1/2"
    • Prevent heat-related damage with vented design that effectively dissipates heat
  • Stainless steel calipers are self-adjusting for smooth, equal braking
    • Stainless steel construction does not flex like aluminum
      • Absolute corrosion protection - ideal for extended marine use
    • Low-drag design retracts piston farther than other calipers for a cooler-running brake
    • Stainless steel piston is 2-1/4" in diameter - 30 percent larger than other brands
      • More braking torque than the competition
    • High-performance, ceramic brake pads
  • Stainless steel mounting brackets provide strength and durability
    • Side-support design ensures that load is placed on bracket, not bolts
    • Extra embossing for additional thread contact ensures tight, secure mounting for caliper guide bolts
    • 4-Bolt brake flange mounting configuration - weld-on flange sold separately
  • Kit includes 2 full brake assemblies
    • 2 Stainless steel rotors
    • 2 Stainless steel calipers
    • 2 Stainless steel caliper-mounting brackets
    • 4 Stainless steel caliper-mounting bolts
  • Hydraulic brake actuator and lines (sold separately) are required for brakes to be activated
    • Requires psi rating of at least 1,500


  • Fits:
    • Axle capacity: 3,500 lbs
      • #84 Spindle
    • Wheel size: 14" and larger
  • Bolt pattern: 5 on 4-1/2"
  • Overall rotor diameter: 10-7/8"
  • Brake flange configuration: 4 bolt
  • 6-Year warranty

Kodiak Rotor Diagram

Disc Brakes

More and more people are switching their trailers over to disc brakes, and with good reason. Disc brakes deliver consistent braking - even at highway speeds - unlike drum brakes, which often show a substantial drop in braking torque at higher speeds. In addition, disc brakes offer a substantially shorter stopping distance than drum brakes.

Disc brake calipers have only one moving part, rather than the many found in drum brakes. This means that there are fewer parts to maintain, fewer parts to get damaged and fewer parts to have to repair or replace, thus reducing maintenance costs.

Over-the-Hub Rotor

Kodiak's slip-on, stainless steel rotor makes it easy to convert an idler axle to a disc brake axle. Simply place the rotor over your hub. It is most often wheel bolt piloted for a loose fit and then held in place by the wheel itself. With a separate rotor and hub, you can easily repair or replace one element of your brake system without having to junk the whole thing.


Kodiak calipers are constructed of stainless steel to prevent flexing and rust. Less flex means more braking torque, resulting in smooth, even braking every time. The corrosion-resistant stainless steel piston is 30 percent larger than standard pistons, ensuring shorter stopping distance and increased torque. In addition, the unique low-drag design of Kodiak's calipers allows the piston to retract farther than in most standard models, giving you a cooler-running brake.

Mounting Brackets

Designed for axles with 4-bolt brake flange configurations, the included mounting brackets are made of heavy-duty, corrosion-resistant stainless steel that is embossed to provide additional threading for guide bolts. The added thread strength ensures a tighter, more secure connection between the caliper and bracket. Another unique feature of Kodiak's brackets is the side-support angle, which guarantees that the load is carried by the bracket, rather than the bolts.

2/R-10-SSS-K Kodiak Disc Brakes - 2 Wheel Set - Rotor Only - Stainless Steel - 3,500 lbs

Replaces 2/RCM-10-SS-K

K2R35S Installation InstructionsInstallation Details K2R35S Installation instructions

Video of Kodiak Disc Brake Kit - 10" Rotor - 5 on 4-1/2 - Stainless Steel - 3,500 lbs

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Kodiak Disc Brake Kit Review

Speaker 1: Today we're going to be taking a look at the Kodiak line of Disc Brake Kits. Now, these kits are available in multiple configurations to fit multiple size axles. They're also available in several different finishes.A disc brake kit like this one from Kodiak is an excellent solution to give us good braking force. Typically, for this kit anyway, you're looking at like a 3500-pound axle. A lot of boat applications, you're hauling a boat sometimes miles and miles and miles, and without brakes on your trailer, you put a lot of unnecessary stress and strain on your truck. A braking kit like this allows us to take the stress, the strain off the braking system on our truck but also gives us a safer ride.In this application we've got a surge coupler at the front of the trailer, so as the truck slows it applies the hydraulic fluid pressure, squeezing our caliper together giving us excellent stopping abilities.

The rotors, calipers, and the ceramic pads are all automotive grade, so they're going to be made to the highest standards being sure we get excellent braking capabilities.Now when we compare a disc brake kit like this to a hydraulic drum-style brake, there are several advantages. Of course, we all know disc brakes tend to work better than drum brakes. They lock up less. We typically don't have the moisture being held inside. Especially in a marine application, that hub fills up with water, that moisture stays inside, causes some corrosion issues.

In this situation, once we bring these out of the water, everything's going to drain away. Air can get to it very readily and dry everything up.Another advantage we're going to get with this particular kit over the other disc brake kits available, the material composition is very corrosion-resistant. Our rotor, caliper, all stainless steel, plus they take that a step further, put a Dacramet finish all the way around. So that's going to work out really well, especially in a marine application like this, but also just on a utility trailer, keeping everything nice, corrosion-free. It's also going to be an excellent, excellent choice if you use it in a saltwater-type application.Something else you'll notice, pretty common on automobile applications, not usually on trailers, is going to be the ventilated rotor here.

So you've got two wear surfaces here and here. Those are going to be separated to allow air to flow freely in there and get everything cooled off to give us premium braking performance every time we hit those brakes.All right. With the bracket installed, we can move onto installing our rotor. That's one of the big benefits I like about this kit. You don't have the whole disc with the hub assembly in it.

So if you ever need to replace the disc, you're just replacing the disc, not your entire hub. This is going to fit right on our idler hub just like that, very common on automobile applications. They call this more like a top hat rotor where it it slides over your lugs, and then your wheel is actually going to hold that in and flush.Next, we'll move on to getting our caliper installed. Now the calipers can go either side. You don't have to have a left and a right. You can see we've got a bleeder screw on both sides. We want, of course, for our hydraulic connection to be facing in. Our slide bolts are going to come in this way just like that, and then these two portions are going to go on the back side of our bracket. So we slide that over, bring it in, and then we'll just push our bolts in, line them up with our holes and get them started. Now those do have loctite on them, so you'll just get them started a little bit, and then we'll use a 13mm socket and snug them on down.Now that we've got those snugged down, we'll use our torque wrench and we're going to torque them down to the specifications listed in the instructions. With our brake assemblies in place, it's time at this point to install our tire back on. Now, we do recommend using a torque wrench and torquing these down properly per the 1/2" stud application. Something we've seen, especially in the automobile industry, if you tighten these lug nuts down too much, you might cause that rotor to warp a little, decreasing your performance. That's going to complete our look at the Kodiak line of Disc Brake Kits.

Customer Reviews

Kodiak Disc Brake Kit - 10" Rotor - 5 on 4-1/2 - Stainless Steel - 3,500 lbs - K2R35S

Average Customer Rating:  4.5 out of 5 stars   (6 Customer Reviews)

Trailer disc brake kit includes 2 assemblies with rustproof, stainless steel rotors; calipers; and mounting brackets. Assemblies fit 3,500-lb axles and 14" and larger wheels. The 10" rotor features a 5 on 4-1/2 bolt pattern.

- K2R35S

Just installed, which was very easy; everything fit nicely! My only complaint concerns the bleed nipples, the neck is too short. Having a heck of a time getting an air tight seal with the bleeder hose. Will update after a few dips in the ocean; will see how well they hold up. Semper Fi 637703

- K2R35S

This website is very informative and obviously designed and written by people who know their products. All my questions were answered by the click of a button thus allowing me to order parts that fit with no need for returns. The K2R35 kit was all stainless and made well, installed easily and worked perfect with all parts included. The best choice for saltwater use. Extremely pleased with purchase. 278106

- K2R35S

DOES NOT INCLUDE MOUNTING BOLTS. The 7/16 galvanized mounting bolts are NOT included. What a way to cheap out on a 700 dollar set of brakes. The brakes are good and come loaded with SS pads, but making me take a separate trip to the hardware store? That really sends the wrong message when you crack the box open on these. 522960

- K2R35S

Used 2 sets on a boat trailer and went electric over hydraulic at the same time. Boat is trailering better then ever. Thinking of going with a similar setup on my toy hauler, I'm that happy with the set up. The install was easer then expected, other then needing to run hydraulic lines, it was as easy as a normal brake job on the trailer. 418058

- K2R35S

Would get 5 stars if the bolts for the brackets were included. 521291

- K2R35S

Delivered faster than expected. Fair pr icing. 458938


Ask the Experts about this Kodiak Trailer Brakes
Do you have a question about this Trailer Brake?

  • Stainless Steel Kodiak Disc Brakes for 3,500 Pound # 84 Spindle
  • A # 84 spindle, like # R40484, is a spindle for a 3,500 pound axle that has inner bearing # L68149 and outer bearing # L44649. The bearing kit that fits is # BK2-100. To replace your brakes and hubs you'll need the Kodiak Stainless Steel Brake Kit # K2R35S with hubs # KH84545S. You'll also need the bearing kit # BK2-100 that I mentioned earlier.
    view full answer...

  • Parts Needed to Install All Stainless EOH Disc Brake Components on Trailer with 3,500 Axles
  • For the idler hub axle the easiest way to add stainless disc brakes would be a slip on kit like part # K2R35S which has rotors that would slip right over the current hubs and comes with everything else needed to install. To convert the hubs too of this axle to stainless you'd also need the part # KH84545S. Using the hub # KH84545S with the slip on disc kit part # K2R35S with it would be your best option for your current brake axle too since it's the only way to get everything stainless....
    view full answer...

  • Lug Nut Recommendation for Use with Kodiak Disc Brake Kit part # K2R35S
  • The lug nuts associated with the Kodiak Disc Brake Kit part # K2R35S that you referenced is the part # KALN1375S.
    view full answer...

  • Is the Titan Disc Brake Kit # T4843400 Good For a Salt Water Boat Trailer
  • In the Titan disc brake kit, # T4843400, the hubs and calipers are silver cad plated, the actuator is zinc-coated, and the lines are all steel. This is not an ideal set up for a salt water application. The best option would be to go with stainless steel parts. You could start with Kodiak disc brakes, # K2R35S. For 2 axles you would need 2 sets. They fit 14 inch and larger wheels and will fit a hub with a 5 on 4-1/2 bolt pattern. The rotors are the over the hub style. The actuator...
    view full answer...

  • Are the Backing Plates for the Pads in a Kodiak Stainless Steel Disc Brake Kit Also Stainless Steel
  • I spoke with my contact over at Kodiak and he said that the stainless steel disc brake kits that they carry are completely stainless steel. That does include the backing plates for the pads.
    view full answer...

  • Complete Disk Surge Brake Setup Recommendation for a Rogue Tandem Axle Boat Trailer
  • We have everything you need, just not in one kit. For a disk brake kit that will bolt up to your 4 bolt brake flanges and will slip over your 5 on 4-1/2 inch bolt pattern you would want the part # K2R35D for a dacromet finish. Or if your trailer will see salt water I would recommend the stainless steel kit part # K2R35S. You will need a quantity of two of these kits for both axles. For a brake line kit you will need the part # DM5425. And then for a surge brake actuator you would...
    view full answer...

  • What Type of Stainless Steel are the Kodiak Disc Brake Kits Made of
  • I spoke to my contact at Kodiak and he informed me that the Kodiak Disc Brake kits like part # K2R35S that you referenced are made of 304 stainless steel..
    view full answer...

  • Will Kodiak Disc Brakes Work on a 3,500 lb. Dexter TorFlex Axle
  • Yes, as long as your 3,500 lb. Dexter TorFlex axles have a brake mount flange. A set of Kodiak brakes such as the Kodiak Disc Brake Kit part # K2R35S for idler hubs or part # K2HR35D for without idler hubs, will work well for you. If you do not have a brake mounting flange already installed on your Dexter TorFlex axles, you will want to have a qualified professional welder do so.
    view full answer...

  • Best Disc Trailer Brake Kit for Salt Water Use on 3500 Pound Axle
  • The Kodiak disc brake kit # K2R35DS is made up of Dacromet and stainless steel components. Dacromet has a 400 to 600 hour salt spray rating while stainless steel is about as corrosion resistant as you can get. Still when using these items in a salt water environment be sure to hose them off after use with fresh water. For the absolute best in corrosion resistance go with an all stainless kit like # K2R35S. I have linked installation details for you. I have also included a link to our...
    view full answer...

  • Everything Needed to Install Electric Over Hydraulic Disc Brakes on Trailer with 3,500 lb Axle
  • I can help you pick out the parts you would need and make it as simple as possible, but there isn't a single axle electric over hydraulic kit that includes everything. You would want to start the part # HS381-9067 which comes with the nicest actuator around, a breakaway kit, junction box and the needed wiring. For the brake components you would want the part # K2R35D for a 3,500 lb kit unless the trailer will be seeing saltwater. In that case you would want the # K2R35S instead. For...
    view full answer...

  • Brake Line Kit to be Used with Kodiak Disc Brake Kit K2R35S
  • The Kodiak disc brake kit part # K2R35S is designed for one axle. So it fits the left and right of a single axle. If you had a tandem axle you would need to buy two sets of this. I like flexible brake line as it's easier to work with. So for a single axle trailer you would want the part # 18SI-BLKIT. If you have a tandem axle trailer you instead would want the part # 20TA-BLKIT.
    view full answer...

  • Recommend Kodiak Disc Brake Kit To Fit Trailer With 13 Inch Wheels
  • The reason why the Kodiak Disc Brake Kit - 10 Inch Rotor, part # K2R35S, will not fit 13 inch wheels is because part # K2R35S uses a slip on rotor, so the assembly is slightly bigger making the caliper sit out further. You would need a hub and rotor assembly disc brake kit. The caliper and rotors you would need for your trailer with 13 inch wheels is the Kodiak Disc Brake Assembly, part # K2HR35DS. You would need to order a quantity of 2 of part # K2HR35DS, as it is sold for one side....
    view full answer...

  • Can Stainless Steel Brake Assemblies Attach to Galvanized Steel Mounting Flange
  • In general if you are in a situation with atmospheric conditions of moderate to mild humidity, contact between a galvanized steel surface and a stainless steel is unlikely to cause substantial incremental corrosion. Only under extreme humidity would this be an issue. I wouldn't worry about it if I were you. We've yet to hear about an issue from any of our customers either.
    view full answer...

  • Availability of Rust-Proof Electric Trailer Brake Assemblies for Use in Sea Water
  • Generally electric trailer brakes are not ideal for use in or near water. Boat trailers generally use either drum or disk hydraulic braking systems to avoid mixing water and electricity, which generally do not like each other. The best brakes for salt water environments are stainless steel disc brakes, such as # K2R35S from Kodiak. It would not be a good idea to mix brake components from different manufacturers since these parts would not have been tested together.
    view full answer...

  • Is there a Left and Right Side for the Kodiak Disc Brake Kit # K2R35S
  • For Kodiak Disc Brake Kit # K2R35S it does not matter which side you mount the components. Both of the rotors and the calipers can be mounted on either side. I have linked a video showing an example installation for you.
    view full answer...

  • Availability of Kodiak Disc Trailer Brake Kit for Salt Water Use
  • Many of our Kodiak disc brake kits are made up of Dacromet and stainless steel components. Dacromet has a 400 to 600 hour salt spray rating while stainless steel is about as corrosion resistant as you can get. Still when using these items in a salt water environment be sure to hose them off after use with fresh water. We do not have Kodiak kits for 2 axles that include new lines and a controller. However we can build a kit for you ala carte. To build the correct kit we will need your...
    view full answer...

  • Electric/Hydraulic Disc Brake System for Tandem Axle Boat Trailer Exposed to Saltwater
  • The hub/rotors included in the # T4843700 are Dacromet coated. Dacromet has a 400-600 hour salt spray rating, which means it can withstand 400-600 hours of exposure before signs of corrosion begin to appear. Although stainless offers better corrosion resistance, the Titan kit would last you for awhile, especially if you do a good job of hosing the trailer off after exposure to salt water. The Titan # T4843700 is compatible with 3500 lb axles, and uses a L68149 inner and L44649 outer...
    view full answer...

  • 3,500 lb Axle Disc Brake Kit Recommendation for 10 inch Wheels
  • For your 3,500 lb axles the Kodiak Disc Brake Kit # K2HR35E-8 will be a direct fit and will work great. These also fit behind 10 inch wheels so it will be compatible in that regard as well.
    view full answer...

  • Stainless Steel Disc Brakes for 3,500 Lb. Axles with a 5 on 4-1/2" Bolt Pattern
  • For a completely stainless steel version of the Kodiak Disc Brake Kit part # K2HR35D you will want to use the Kodiak Disc Brake Kit part # K2R35S. You will also need an idler hub like the Kodiak Trailer Hub part # KH84545S as the stainless steel version of this kit is only offered with the rotor and not the hub/rotor assembly. If you want the hub/rotor disc brake kit in stainless steel then the only option I have for you is the Kodiak Disc Brake Kit part # K2HR35DS which is a combination...
    view full answer...

  • How to Determine Correct Replacement Disc Brakes for EZ Loader Boat Trailer for Salt Water
  • I can let you know how to determine what disc brakes you need although we do not have any type of database with parts based on year, make and model of trailer and I was unable to find any reference to a model TRSX240. To get the right replacement disc brake assemblies you need to know the weight capacity of your trailer's axles, the number of bolts in your brake mounting flange (like in the accompanying photo) and your bolt pattern for the rotors to slip over. If you are unsure of what...
    view full answer...

  • Which Caliper Should You Start with When Bleeding Brakes
  • When bleeding the brakes, you will indeed want to start with the caliper farthest from the actuator and then bleed the other assemblies that share the same hydraulic circuit. After those have been bled, simply start again on the other side of the trailer with the furthest brake from the actuator. This is to ensure that no air bubbles get trapped up along the trailer lines. I did also check with both Kodiak and Titan and both also recommend starting with the calipers furthest away from...
    view full answer...

  • Compatibility of Disc Brake Kits for Idler Hubs on Boat Trailer
  • The Kodiak Disc Brake Kit # K2R35S is designed for 3500-lb-rated axles that have idler hubs and allows converting them from idler to disc brake operation. The bolt pattern determines whether they will fit on your idler hubs; and they will fit a #84 spindle like # R20484. This system would brake too aggressively if installed on a 2100-lb GAWR axle. Brakes should always be selected based on the axle weight rating; this is true for disc or drum brakes. Typically a 2100-lb axle will...
    view full answer...

  • Does Kodiak Disc Brake Kit # K2R35S Have Stainless Brake Pads
  • The Kodiak Disc Brake Kit # K2R35S does not have stainless brake pads. This disc brake kit has stainless steel rotors, calipers, and mounting brackets. The kit has high performance Ceramic brake pads. This kit is designed for 3,500 lb axles and 14 inch and larger wheels. This kit has a 5 on 4-1/2 bolt pattern.
    view full answer...

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Info for this part was:

Expert Research:
Michael L
Video Edited:
Zack K
Written by:
Lindsey S
Expert Research:
Michael H
Installed by:
Jeff D
Expert Research:
Jameson C
Video Edited:
Jacob T
Updated by:
Adele M
Expert Research:
Adam R
Photos by:
Amber A
Expert Research:
Jeffrey L
Updated by:
Sarah W
Updated by:
Hannah L
Updated by:
Mike S

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