Does Brake Width Matter for Brake Assemblies on a 10K Trailer Axle


Brake width? 12 1/2 by 3/12 What’s the common width? Does it really matter? I’m sure the diameter matters.


Expert Reply:

The closest brake assemblies that we have to your 12-1/2" x 3-1/2" measurements come in the Brake Kit # 10257-59 and are 12-1/4" x 3-1/2". The most common measurements for a 10K axle (which from your measurements sounds like you have) are 12-1/4" x 3-3/8" which are found in the Brake Kit # AKEBRK-10 that you referenced.

The 12-1/2" diameter measurement that you took is a bit unusual and I couldn't find anything that matches. If you measured your hub and drum assembly then it is possible that they are warped which would cause you to have that slightly different measurement. Since you want the diameter and width of your brake assemblies to match your hub and drum assemblies it is important for them to match up.

If you can send me some pictures of the measurements you took I can help you confirm what the correct brake assemblies are for your application. I have attached a review video for the Dexter Trailer Hub and Drum Assembly # 8-430-5UC3 as well so you can see how we take the internal measurements of the hub and drum assembly.

expert reply by:
Jon G

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