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Brake Mounting Flange for 2-3/8" Round Axle

Brake Mounting Flange for 2-3/8" Round Axle

Item # 4-35
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Accessories and Parts 4-35 - 2-3/8 Inch Diameter Axle - Redline
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Trailer Brake Mounting Flange - gets welded to the end of the axle beam to support the brake assembly. Call 800-298-8924 to order Redline accessories and parts part number 4-35 or order online at etrailer.com. Free expert support on all Redline products. Guaranteed Lowest Price and Fastest Shipping for Brake Mounting Flange for 2-3/8" Round Axle. Accessories and Parts reviews from real customers.
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  • Reviews (11)
  • Q & A (104)
  • Videos (1)
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Redline Accessories and Parts - 4-35

  • Trailer Brakes
  • Disc Brakes
  • Electric Drum Brakes
  • Hydraulic Drum Brakes
  • Redline
  • Hardware
  • Mounting Flange
  • 10 Inch
  • 2-3/8 Inch Diameter Axle

Trailer Brake Mounting Flange - gets welded to the end of the axle beam to support the brake assembly.


  • For Use with 10" Brake Assembly
  • Center hole diameter: 2.27"
  • 4 Bolt Holes are 2-7/8" a part (center to center)
  • Flange thickness: 1/4"
  • Brake mount flange gets welded to the end of the axle to provide a secure mounting place for brake assemblies

4-35 Brake Mounting Flange for 2-3/8" Round Axle

Video of Brake Mounting Flange for 2-3/8" Round Axle

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

Video Transcript for Redline Trailer Brakes 4-35 Review

Today we're going to be taking a look at a brake mounting flange for a 2 3/8" round axle. This trailer brake mounting flange gets welded to the end of the axle beam to provide a secure mounting place and support for the brake assembly. This part number includes one brake mounting flange. It's for use with a 10" brake assembly. The center hole diameter, that pilot hole. That's going to give us a diameter of 2.27".

You can see that's going to contain four bolt holes. These are going to be separated apart from one another on center by 2 7/8", and that's going to be the same separation for each one. That's a square design. It's a steel construction that has a thickness of about 1/4". Overall measurements going edge to edge this direction. It's going to measure 3 3/4", and again it's a square design so it's going to measure the same going in this direction, 3 3/4".

That's going to do it for today's look at the brake mounting flange for a 2 3/8" round axle.

Customer Reviews

Brake Mounting Flange for 2-3/8" Round Axle - 4-35

Average Customer Rating:  4.7 out of 5 stars   (10 Customer Reviews)

Trailer Brake Mounting Flange - gets welded to the end of the axle beam to support the brake assembly.

- 4-35

Product arrived in excellent condition and clean. I was eligible for free shipping. Order was placed on sunday afternoon and received north of NY state on next friday. I would definitely consider buying from etrailer again. 524549

- 4-35

fits right on a heavy duty spindle ready to weld on for a brake flange. Good solid metal. 467092

- 4-35

Flange was a perfect fit, quality material, would buy again if needed. 615632

- 4-35

Worked Awesome!!! 555615

- 4-35

Service was good and shipment was rite on time. One of the grease seals was bent in the shipment but I think it will work time will only tell. I was hoping that Dexter being made in America that they would use American made bearing also, they don't . The only other thing was I Thought I was getting bearing buddies but after looking back at the description I see that it wasn't , that is my mistake for not knowing better. I would have saved 18 dollars being I used my old grease caps instead. But over all I will use this company again great service. Keep up the great work. 451290

- 4-35

product works great still in like new condition ! A++++++ 429528

- 4-35

not sure decided not to use it 335729

- 4-35

The package arrived today, look great! (Brake flanges) I ordered around 1:00 pm and received a email around 5:00 pm stating that they have shipped, could not believe this, but they are here. Thanks for all the promptness!! Merv L. 290146

- 4-35

Once I received this brake flange, it turn out great. Remember to get the large opening for 3500# axles. 220167

- 4-35

it works 15389


Ask the Experts about this Redline Accessories and Parts

  • 10 Inch Electric Brake Assemblies for Boat Trailer
    Thanks for all that info, and the hole spacing you mentioned for your brake mounting flange means you have a standard 4-bolt flange like Brake Mounting Flange # 4-35. Based on that and the 10 inch drums you have then the brakes you need are for 3,500 lb axles and for that I recommend the Electric Trailer Brake Kit # AKEBRK-35-SA. These are self-adjusting electric brakes that measure 10" x 2-1/4" and will work with your brake mounting flange and 14 inch wheels. To install them you'd...
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  • Recommendation For Replacement For Brake Mounting Flange
    I have brake mounting flanges that will work for you. We have several different types and sizes so you will need to find the right size and then have it welded on by a licensed professional welder. For example, for a 2-3/8 inch round axle we carry a Redline Brake Mounting Flange, Item # 4-35. I am attaching a link to an article, a video, and our available inventory for you to check out.
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  • Can Brakes be Added to 3,500 Pound Dexter Trailer Axle
    Yes, brakes can be added to your trailer and I've linked an article to help with the parts you'll need. The first thing you'll need is the brake mounting flanges welded to the axle, like you mentioned. The correct flange is # 4-35 however these need to be welded by a qualified welder because the mounting flange must be welded square and concentric. This is generally done using a jig at a trailer shop. I've linked our selection of hub and drum assemblies for 3,500 pound axles. You'll...
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  • Replacement Hub/Drums and Brake Assemblies for Lippert Axle
    A replacement hub and brake assembly will work well with your existing axle if you choose a hub/drum that's compatible with the spindles on your axle, if the replacement hub drum and your existing hub use the same inner and outer wheel bearings and the same wheel bolt pattern, and if your existing axle has a brake mounting flange on it (see photo). I'll link you to our selection of hub/drums for a 3500 lb axle. Simply use the filters on the side of the page to narrow down your selections...
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  • Is there a Brake Mounting Flange for a Square 3500 Pound Trailer Axle
    When square axles are made brake mounting flanges with round holes are still used. It may require some additional steel when welding but your best option is # 4-35. Keep in mind that welding on a brake mounting flange properly requires a special jig and someone with experience in welding them on to ensure they are perfectly straight and concentric. Otherwise it can lead to all sorts of brake, tire, and other issues.
    view full answer...
  • Adding Electric Brakes to a 1997 Dutchmen Pop Up Camper
    Installing electric brakes on any trailer isn't too hard actually. All you have to do is mount the brakes (which requires a brake mounting flange), install a hub and drum assembly, and then run some wiring and a breakaway kit and your trailer is good to go. On your vehicle side you need a 7-Way connector and a brake controller to activate the trailer brakes. Most likely you have a 2,000 lb axle (which you can verify by looking in the middle of it for a stamp) so you need the mounting...
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  • Recommended Disc Brakes for 3,500 lb Axles
    There is a little bit of information from Kodiak brakes that has some tests that I will link you to separately. We do consider Kodiak to be top-notch and for a 3,500 lb idler hub, I recommend the following braking system: - Kodiak Disc Brake Kit - 10" Rotor - 5 on 4-1/2 - Dacromet and KodaGuard - 3,500 lbs # K2R35DKG These will fit over your hubs so long as they have a 5 on 4-1/2" bolt pattern, which is pretty standard, though I'll link you to a help article to figure out how to determine...
    view full answer...
  • Where does a Brake Flange need to be Welded on a Spindle
    Welding a brake flange on a spindle is not something we recommend most people doing. Most spindles have these welded on at the factory with specialized jigs and higher precision welding equipment that what even experienced do-it-yourselfers have. The flange needs to be welded on concentric and square. Square meaning the flange must be a true 90 degrees from the spindle and concentric meaning the gap around the spindle must be the same 360 degrees around. If not, the brakes will not wear...
    view full answer...
  • Parts Needed to Add Electric Drum Brakes to a 16 Dual Axle Trailer
    To install electric brakes on your trailer you need brake mounting flanges, brake assemblies, hub and drum assemblies, trailer wiring for the brakes, a breakaway kit, and a brake controller installed in your vehicle. You do want to install brakes on both sides of the axle(s) otherwise your trailer will pull to one side when your brakes are applied. We also recommend installing brakes on all of the axles that you have on your trailer. This helps to ensure that you have enough stopping...
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  • Are Specs Available for Welding on a Brake Mounting Flange to a Trailer Spindle
    There is a special jig required to weld on brake mounting flanges such as # 4-35. The flange needs to be welded on concentric and square. Square meaning the flange must be a true 90 degrees from the spindle and concentric meaning the gap around the spindle must be the same 360 degrees around. If not, the brakes will not wear evenly and will cause reduced braking performance. If not at the right depth the brakes will not be as effective and again, wear unevenly. Ideally you would...
    view full answer...
  • How To Determine What is Needed To Add Electric Brakes To Enclosed Trailer
    In order to add electric brakes to your trailer there are a few things needed. I have attached a link to a helpful article that explains how to add electric brakes to a trailer an what is needed. Some of the things you will need to know are the weight capacity of the axle(s), and if the axle has a brake mounting flange installed, similar to part # 4-35. If there is no brake mounting flange on the axle, you will need to have one welded on by a certified professional. You will then...
    view full answer...
  • Parts Needed to Add Electric Brakes to Boat Trailer with 3,500 Pound Axles
    There are a number of parts you'll need to add electric brakes to your trailer. I've linked an article they may help explain some of them for you. With a 3,500 pound axle you'll need brake flanges with a 4-bolt pattern like # 4-35. Your trailer ay already have these and if so that's good. The brake flange needs to be welded to the end of the axle to support the brake assemblies. It will need to be welded perfectly straight for your brakes to function properly so the work should be...
    view full answer...
  • How to Add Electric Over Hydraulic Disc Brakes to a Boat Trailer with 3,500 Lb Axle
    I am assuming you are referring to an electric over hydraulic disc brake system? If this is the case then you are going to need the following if you don't already have them which are a brake mounting flange, disc brake assembly, brake line kit, electric over hydraulic actuator, and a breakaway kit. I have attached my recommendations on each of the following parts below. We also have a help article that explains this whole process which I have attached for you. Brake Mounting Flange:...
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  • Can Electric Brakes With Parking Brakes for 3,500 lb Axle Work on 3,000 lb Axle
    We do offer electric brakes with a parking brake for 3,500 lb axles, and so long as you have a 4-bolt mounting flange like part # 4-35 and you have drums that measure 10" diameter and 2-1/4" deep you can use these brakes. The correct brakes for this are the Dexter Electric Trailer Brake Kit w/ Parking Brakes # K23-086-087-00. If you don't have an adjustment spoon you will also need Brake Adjustment Spoon # W80630. I have added a link to a video review of the brakes for you to...
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  • Determining the Axle Capacity of a 2 Inch Square Trailer Axle
    The only way to know for sure is to find a stamp or plate somewhere on the axle with its capacity. If this isn't available you can use the bearing numbers to determine which spindles the trailer has and we can determine the capacities of the hubs that will fit. Another possible thing to check is if the axle has brake flanges how many bolt holes does the flange have? a 4 bolt flange it's likely a 3,500 pound axle or smaller. A 5 bolt flange is usually a 4,400 pound axle or larger.
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  • How to Find a Brake Mounting Flange for an 8 inch Rotor
    To find out if the Redline Brake Mounting Flange # 4-35 that you referenced will work for your application you will just need to take a few simple measurements. This mounting flange fits 2-3/8 inch round axles and will be welded to the axle. The bolt hole pattern that you will need to match to your brakes is 2-7/8 inches center-on-center as is demonstrated in the attached video and picture. If your axle is a different diameter just let me know what it is and what your brake/rotor...
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  • How to Determine Correct Electric Brake Size for Trailer
    To determine the brake assemblies that will fit your trailer, you need to know your axle's weight capacity, your mounting flange bolt pattern and the inside diameter and depth of your drum. For example, the Electric Trailer Brake Kit # AKEBRK-2 are for 2,000 lb axles, measure 7" diameter x 1-1/4" wide (so that is the drum size they fit in) and fit a 4-bolt mounting flange that has bolt holes which measure 2-7/8" apart on center like Mounting Flange # 4-35. I have added a link to...
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  • Parts Needed to Add Electric Brakes on Trailer With 3,500 lb Axle
    We do have what you need to install electric brakes on your trailer, and so long as your current hub and drums are 10" diameter x 2-1/4" wide (which is standard for 3,500 lb axles) and you have a 4-bolt brake mounting flange such # 4-35 you can use the Dexter Electric Trailer Brake Kit # 23-26-27. If you don't have that brake mounting flange you would need to get it welded onto your axle beam. Other parts you need for this are the Brake Adjustment Spoon # W80630 and Hopkins Engager Push-To-Test...
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  • 4 Hole Brake Mounting Flange Dimensions for 10 Inch Brake Assembly
    The Electric Trailer Brake Kit - 10" - Left and Right Hand Assemblies - 3,500 lbs # AKEBRK-35 will bolt onto the standard brake flange like # 4-35 that is 2-7/8 inches on center and 4 inches diagonal on center. I've attached a photo to assist. The bolts will be 7/16"-20 and the Mounting Hardware for 10" Brake Assemblies # BRKH10B will give you the necessary lock washers and nuts compatible. The holes range from 15/32 to 1/2 inch.
    view full answer...
  • How to Find the Correct Brake Mounting Flange
    Capacity is what will have the capacity as opposed to the spindle, and the correct brake mounting flange will depend on the diameter of your axle. Since you mentioned a 3,500 lbs I assume that is your axle's capacity and typically those have 2-3/8" diameters. For that there is the Brake Mounting Flange for 2-3/8" Round Axle # 4-35. We don't have any flanges for 2" axles, but the other possibility is the Brake Mounting Flange for 1-3/4" Round Trailer Axles # 4-34 which is the typical...
    view full answer...
  • Brake Assembly Replacement Recommendation for Dexter Assemblies 36-19-47
    Based on what you described you have a standard 4-bolt trailer brake assembly bolt pattern. For brake assemblies that match that and the 4,400 lb axle capacity you have you'd want the part # K23-478-00 for the left hand side and part # K23-479-00 for the right hand side. For a brake flange you'd then want the part # 4-35 if you were also in need of that.
    view full answer...
  • How to Determine Correct Over-the-Hub Disc Brakes for Boat Trailer
    There are a few things that you will need to know in order to choose the right disc brake kit for your 2003 DHM boat trailer. I assume you have idler hubs and are replacing your brakes so you already have a 4-bolt brake mounting flange # 4-35 as well as an actuator and brake lines. If so, the first thing you need to know to get the right brakes is the axle capacity you have, and the other is your bolt pattern. If you aren't sure what your bolt pattern is I've linked a help article as...
    view full answer...
  • Adding Brakes to Utility Trailer with Custom 3,500 lb Axle with 6 on 5-1/2 Bolt Pattern
    Since you're looking for a relatively easy installation and your camper only has a single 3,500 lb axle, your best option is to add electric brakes. These will work well to provide safe and reliable breaking on your fully loaded trailer and do not require major modifications like adding a hydraulic brake actuator or running hydraulic brake lines, which is the case when adding drum or disc hydraulic brakes to a trailer. If you already have hubs with integrated drums on your trailer,...
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  • Brakes, Bearings and Grease Seal for Dexter 8-247 Hubs
    Thank you for that info and we have everything you need. An 8-247 hub and drum, which is the same as Dexter Trailer Hub and Drum Assembly # 84546UC3 uses Inner Bearing # L68149, Outer Bearing # L44649, Inner Race # L68111, Outer Race # L44610 and Grease Seal # 58846. These parts are all available in Bearing Kit # BK2-100. For your brakes the correct replacements are Dexter Electric Trailer Brake Assembly - Left Hand # 23-26 and Dexter Electric Trailer Brake Assembly - Right Hand # 23-27....
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  • Replacement Brake Assembly Parts for 2800 lbs Philips/Dexter Axle with 1-1/4 Inch Deep Hubs
    You will want the Replacement Brake Spring Set for Dexter 10" x 1-1/2" Electric Trailer Brake Assembly # K71-362-00. Then you will want the Replacement Trailer Brake Magnet Kit for 7" Brake Assemblies # BP01-068 due to the thinner hubs instead of the traditional 10 x 2-1/4 inch hubs. That guide for the anchor post is not available as a replacement part from any of our manufacturers. Your only other option is to replace the assemblies with the Dexter Electric Trailer Brake Kit - 10"...
    view full answer...
  • Brake Mounting Flange Recommendation for Dexter 3,500 lb Axle
    Looks like you have a 3,500 lb Dexter axle without brake flanges. The correct brake flanges for that style of axle is the part # 4-35. Welding a mounting flange, possible item # 4-35, is a very precise installation. The flanges need to be installed square and concentric to the hub and drum assembly and each other. If the flange is installed incorrectly rapid brake lining wear, improper braking, trailer dog legging, bearing failure, rapid tire wear and, worst of all, weakening of the axle...
    view full answer...
  • How to Determine Correct Electric Trailer Brake Size
    We don't have any way of knowing the brakes you need for your Shorelander boat trailer but can tell you how to determine the right ones. To determine the brake assemblies that will fit your trailer, you need to know your axle's weight capacity, your mounting flange bolt pattern and the inside diameter and depth of your drum. For example, the Electric Trailer Brake Kit # AKEBRK-35-SA are for 3,500 lb axles, measure 10" diameter x 2-1/4" wide (so that is the drum size they fit in) and...
    view full answer...
  • Best 175/80-13 Trailer Tires for Highway Trips & Can Electric Brakes be Added to Boat Trailer
    Let's start with your tires and the best 175/80-13 tire is absolutely the radial tire, the Karrier ST175/80R13 Radial Trailer Tire - Load Range D # AM10210. The reason you want to use this tire over the Bias # AM1ST77 you mentioned is because radial tires are designed for on-road use while bias are designed for things like off-road and agricultural use. Radial tires flex more and run cooler to help prevent blowouts so the best option is absolutely the radial Karrier Tires # AM10210. As...
    view full answer...

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Info for this part was:

Expert Research:
Robert G
Expert Research:
Michael H
Updated by:
Adele M
Installed by:
Cole B

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