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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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Accessories and Parts 4-35 - 2-3/8 Inch Diameter Axle - Redline
4-35 - Hardware Redline Trailer Brakes
Brake Mounting Flange for 2-3/8 Inch RD Axle
Brake Mounting Flange for 2-3/8 Inch RD Axle
Brake Mounting Flange for 2-3/8 Inch RD Axle
Brake Mounting Flange for 2-3/8 Inch RD Axle


  • Trailer Brakes
  • Disc Brakes
  • Electric Drum Brakes
  • Hydraulic Drum Brakes
  • Hardware
  • Redline
  • 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. 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 (9)
  • Q & A (74)
  • Videos (1)
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Redline Accessories and Parts - 4-35

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 Accessories and Parts 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   (9 Customer Reviews)

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

- 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

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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

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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

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

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

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

- 4-35


not sure decided not to use it 335729

- 4-35


Worked Awesome!!! 555615

- 4-35


it works 15389


Ask the Experts about this Redline Accessories and Parts
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  • You will need to measure to select the correct brake assemblies for your axles. You need to know that the brake assembly is compatible with the brake mounting flange and with the drum's diameter and depth. I added a photo showing how to measure a hub/drum for you, Typically 6,000 lb Dexter axles have a 5 bolt brake flange, like part # 4-44-1, and utilize 12 x 2 inch brake assemblies, like part # 23-106. The correct brake shoes for these assemblies are part # AKBRKR-S-12. If you...
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  • Recommendation for Installation of a Brake Mounting Flange on a Trailer Spindle and Axle
  • 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 can occur. Usually special jigs are used to install the flange. The jig will keep the flange square and concentric to the axle and...
    view full answer...

  • How to Find Wheel Bolt Pattern to Find the Correct Replacement Trailer Brakes
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  • 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...
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  • Replacement Hub/Drums and Brake Assemblies for Lippert Axle
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  • Will Titan Disc Brake Kit # T4843200 Fit Tandem Axle Boat Trailer w/ 3500 Axles
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  • Can Kodiak Disc Brake Kit # K2R35D Replace Idler Hubs on Demco Tow Dolly
  • Thank you for including a photo of your idler hubs. The Kodiak Disc Brake Kit you referenced, part # K2R35D, requires a standard 4-bolt brake mounting flange in order to mount. The standard 4-bolt square mounting flange that this kit will fit, part # 4-35, is shown in the linked photo which includes measurements of the hole spacing. We do not recommend drilling your existing flanges; it is better to have a qualified welder replace them with the correct ones. Your existing hub appears to...
    view full answer...

  • Disc Brakes Recommendation For 3500 Lb Boat Trailer
  • The Kodiak disc brake kit you asked about, part # K2R35DS, will fit 3500 pound axles with wheel sizes 14 inches or larger. The 10 inch rotors have a 5 on 4-1/2 bolt pattern. The additional 1/2 inch would mean the wheels would indeed be mounted approximately 1/4 inch further out on each axle. The existing hubs along with the bearings and races would have to be removed. You mentioned that the axle has a 4 bolt flange already welded to it. I have attached a photo of how the brake mounting...
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  • Can Electric Brakes Be Installed On One of The 3,500-Lb Axles of a Tandem Axle Utility Trailer
  • I would first check with the laws in your state as far as how many brakes are required for the gross vehicle weight rating (GVWR) of your tandem axle trailer. Some states require brakes on both axles of a tandem axle trailer. If brakes are allowed on one axle I would recommend to put them on the front axle since that is the axle that will be bearing the most weight of the trailer. Also, when stopping the trailer, the weight of the trailer will be shifting to the front axle more than...
    view full answer...

  • How To Determine Which Electric Brakes Will Fit On A 6x12 Utility Trailer Without Any Brakes
  • I will need the bearing part numbers and the grease seal part number from your trailer so we can determine the correct hub drum assembly that is needed to install electric brakes on your trailer. The numbers needed for your bearings will be imprinted on the bearings and seals themselves. You would disassemble the hub and read the numbers off the bearings and seals. Remember which order they go in. Some trailer hubs have different size bearings on the inner and outer sides of the hubs. I...
    view full answer...

  • Recommended Disc Brakes for a Magic Boat Trailer with 3,500 Pound Tandem Axles
  • Adding a disc brake system will be a great addition to your Magic boat trailer. The parts you will need are a brake mounting flange, spindle, disc brake assembly, hydraulic disc brake actuator and brake line kit. I recommend the Kodiak disc brake kit # K2R35DKG because it has rust resistant disc brakes and is great for boat trailers. The cast iron, slip on over the hub rotors are great because you won't need to replace your entire hub assembly. Note, as long as your bolt pattern is...
    view full answer...

  • Electric Brakes for 2001 Jayco Eagle 12 SO Pop-Up Camper
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    view full answer...

  • How to Add Trailer Brakes to a Home Made Trailer
  • If your trailer axle has spindles with mounting flanges, # R20384EZ, on them then the conversion to electric trailer brakes should be fairly easy. You will need electric brake assemblies, # 23-26, sized properly for the trailers gross weight loaded and ready to travel. You will also need trailer hub and drum assemblies, # 84546UC3, sized properly to match the trailer spindles, wheel bolt pattern and the brake assembly selected. If your spindles do not have mounting flanges you will need...
    view full answer...

  • Parts Needed To Add Electric Brakes On Motorcycle Trailer
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    view full answer...

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  • Adding Electric Trailer Brakes to a 3,500 Pound 2001 Car Mate Trailer
  • The first thing to check for on the trailer is whether or not it has brake mounting flanges welded to the ends of the axles. A brake mounting flange on a 3,500 pound axle would look like # 4-35. If there are no brake mounting flanges they would have to be installed to add brakes to the trailer. The brake assemblies do not come with hub and drum assemblies so those would have to be purchased separately based on the bearing numbers on the current trailer hubs. The bearing numbers are stamped...
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  • Availability of Retrofit Disc Brake Kit with Surge Coupler for Single 3,500 Pound Axle Trailer
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  • Recommended Brakes for a 3000 Pound Tandem Axle on a Aluma Trailer
  • The first thing you will need to obtain is your bearing numbers. If you the inner bearing # L68149 and outer bearing # L44649 then I recommend the Titan disc brake kit and actuator # T4843100. This will give you the complete kit needed to switch over to disc brakes on your trailer. Many people have switched to disc brakes because it only has one moving part. Hence, fewer parts to maintain thus reducing the cost of maintenance. If you don't have the bearing numbers above, then let me...
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  • What is the Mounting Hole Pattern for Galvanized 10 Inch Marine Trailer Brake Assembly 40715
  • The Demco hydraulic drum brake assembly, # 40715, mounts to a standard 4-bolt mounting flange like # 4-35. The bolt holes are 2-7/8 inches apart on center. If measuring diagonally from a top hole to a bottom hole it is 4 inches on center.
    view full answer...

  • Parts Needed to Add Electric Brakes to a Trailer with a Standard 3,500-lb Axle
  • If you are wanting to add brakes to your trailer that has 3,500-lb axles with a 5 on 4-1/2 inch idler hub that fits 15 inch wheels, like part # AKIHUB-545-35-K, then you will need to upgrade to a hub and drum as there are no kits that add a drum to an idler hub. If you do have the standard size spindle on your axle then you can very well use our Trailer Hub and Drum Assembly # AKHD-545-35-EZ-K which meets all of the criteria that you mentioned. You will need to verify what the inner...
    view full answer...

  • Trailer Brake Mounting Hole Pattern is Not the Same as Drum Bolt Pattern
  • The bolt pattern of the drum has nothing to do with the mounting pattern of a brake assembly. The drum bolt pattern is going to have to match the wheels you are using. The brake mounting pattern needs to match the flange that it bolts to. There are 2 common brake mounting hole patterns; a 5-hole and a 4-hole. The 5-hole version looks like # 4-44-1. The 4-hole looks like # 4-35. etrailer brake assembly # AKFBBRK-35R-D uses the 4-hole pattern. So if you look at your brake mounting...
    view full answer...

  • Brake Flange, Brakes, And Drums Recommendations
  • You said the brake flange you currently have on your trailer measures 2 x 2-1/4 inches. My best recommendation is to have the brake flange you currently have cut off and then have new brake flanges like part # 4-35 welded on by a professional. These are normally welded in place with a jig because they have to be concentric and square. This flange is for round axles that are 2-3/8 inches diameter, and are designed to work with 10 inch brakes like # 23-26 and # 23-27. The drum that would...
    view full answer...

  • 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...

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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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