Additional Measurements for # A20RS440 Axle-less Trailer Suspension

Updated 06/24/2026 | Published 06/20/2026

Products Featured in This Question

Timbren Axle-Less Trailer Suspension w/ Idler Hubs - Standard Duty - No Drop - 4 on 4 - 2,000 lbs

(116)

$1061.82

4" Carbon Fiber Digital Caliper

(27)

$12.31

Question:

Timbren Axle-Less Trailer Suspension w/ Idler Hubs...Part Number: A20RS440 Your product page lists mounting hole locations relative to each other and the base and side plates dimensions C, F, K, L but I also need to know the offset of the mounting holes from the forward edge of the entire bracket Forward edge to the first vertical flange hole the C-F holes Forward edge to the horizontal face mounting hole the K-L holes Thank you

asked by: David F

Expert Reply:

Hey David!

I've attached the manufacturer's engineered drawing for Timbren Axle-Less Trailer Suspension w/ Idler Hubs - Standard Duty - No Drop - 4 on 4 - 2,000 lbs # A20RS440 below to ensure you have all of the specifications you're looking for, but I took a couple of measurements myself as well just to make sure I have you covered. I measured using 4" Carbon Fiber Digital Caliper # PTW80157

The forward edge to holes C measures 1.92" and to hole F measured 2.22"; the top edge to holes K & L measures 0.38".

I'm curious, how are you planning on using this kit? Most times, it's installed on a smaller trailer that isn't wide enough for full-sized axles, but I have heard of some other uses that aren't conventional for these.

expert reply by: Jerry B

David F.

6/24/2026

Thanks Jerry, but I do not see the manufacturer's drawing. The 'Helpful Link" at the bottom is broken. We are manufacturing a custom light weight trailer for a client and need more accurate mounting location info to properly pre-drill all the holes.

Jerry B.

6/24/2026

@DavidF I'm not sure why that's not working for you, but here's the link to the manufacturer's drawing. https://cdn.shopify.com/s/files/1/0693/4560/7962/files/Axle-less_Imperial_REV102622_1.pdf?v=1680556418 That's awesome! Are you a trailer manufacturer or working on a one-time project?

David F.

6/24/2026

@JerryB Thanks - that worked. A bit confusing as the 'hubless' Timbren part number is Timbren #ASR2000S01, whereas with 4x4 hub is #A20RS440. Appreciate the help. We design/mfg whatever the client needs which in this case is a lightweight trailer with Timbren Axle-less suspension :)

Jerry B.

6/24/2026

@DavidF These two parts come from the manufacturer as # ASR2000S01, we just make it into a kit to allow you confidence on having the correct part. So # ASR2000S01 is just the suspension, whereas # A20RS440 is the suspension and a hub.