Replacement Leaf Springs for Calkins Boat Trailer with 3500-lbs Axles

Published 07/12/2020

Products Featured in This Question

4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 25-1/4" Long

(2045)

$49.38

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

(1998)

$68.09

3-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 23-1/8" Long

(2045)

$38.72

4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 27" Long

(3597)

$75.81

Question:

Which U-Bolts can I use?

asked by: Naoki M

Helpful Expert Reply:

I'm not seeing any matches with a CW1820 on that trailer, but it sounds like your trailer has a 3500-lbs axle capacity. You will need to measure your existing leaf springs and then choose the closest match in length; your worn out springs will be a bit longer than a new spring, so you'll typically you'll go down by about 1/2" to find the closest match.

For 3500-lbs axles, something like the # e54SR is 25-1/8" long and might be a good option, but there are also a 23-1/8" spring # e59SR and 27" springs # SP-210275. You will want to measure from the center of one eye to the center of the other eye to get the correct measurement.

If you measure and none of these springs are close to the measurement you're finding, or you've got a different style than the double eye springs, please let me know and I can look for an alternative solution.

expert reply by: Erik B

Naoki

7/12/2020

Which U-Bolts can I use?

Erik B.

7/12/2020

You can use the U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts # APUBR-1 if you also need new U-Bolts for this installation.