Recommended U Bolt Kit and Shackles for 3500-lbs Axle

Updated 05/16/2020 | Published 05/14/2020

Products Featured in This Question

U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts

(1998)

$68.09

CE Smith U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts - Zinc

(977)

$43.80

Shackle Strap - 2-1/4" Long

(504)

$5.65

Question:

Looking for 8 u bolts with nuts and 8 shackles with bolts and nuts for 3500 trailer axles. Can you help? Thank you.

asked by: Kelly W

Expert Reply:

For a 3500-lb axle, it's most likely a 2-3/8" diameter so you can use the U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts # APUBR-1. If this is a boat trailer or utility trailer that might be sitting outside a lot you may want to consider upgrading to the CE Smith U-Bolt Kit # CE23002 since they're zinc plated and will help fight off corrosion a bit better.

For shackles, the most popular size shackle is 2-1/4" like the part # TRSL225, but you'll want to measure the existing shackles on your suspension to make sure you get the correct size. If yours aren't 2-1/4" long measured from center of one bolt hole to the center of the other bolt hole, you'll want to choose the shackles that most closely match your current ones and allow your leaf springs to sit as level as possible. I've linked our entire selection of shackle straps for you to look at if the ones mentioned above don't work for your application.

I've also linked some review videos of these parts that you may want to check out, as well.

expert reply by: Erik B