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What is the Difference Between Timbren Standard Duty and Heavy Duty 3.5K Axle-Less Kits  

Updated 01/27/2026 | Published 08/27/2024

Question:

What is the differences between Timbren Heavy Duty and Standard Duty axle-less suspensions?

0

Expert Reply:

Hey Troy, thanks for reaching out!

The Standard Duty Timbren Axle-Less Trailer Suspension - 4" Lift # ASR3500S06 fits with standard 3.5K brakes and hubs while the Heavy Duty Timbren Axle-Less Trailer Suspension - 4" Lift # ASR35HDS02 work with 5.2K brakes and hubs.

Basically, you just need the Heavy Duty style if you plan on using the trailer for more aggressive terrain like off-roading.

3.5K Brakes and Hubs
- Brakes # AKEBRK-35-SA
- Hub Drum # AKHD-545-35-EZ-K

5.2K Brakes and Hubs
- Brakes # AKEBRK-7-SA
- Hub Drum # AKHD-655-6-EZ-K

expert reply by:
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Jon G
Jesse M. profile picture
Etrailer Expert

Jesse M.

1/27/2026

Hey Troy, how did things go deciding between the Standard Duty and Heavy Duty Timbren axle-less suspensions? It’d be great to hear which setup you went with and how it’s performing. Your update could make it easier for others comparing these two options.

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