Determining Axle Weight Capacity for Boat Trailer with 1-3/4-inch x 2-3/4-inch Rectangular Axle

Updated 03/03/2014 | Published 02/28/2014

Products Featured in This Question

Dexter Trailer Idler Hub Assembly for 6,000-lb Axles - 6 on 5-1/2

(893)

$130.88

Dexter Trailer Idler Hub Assembly for 2,200-lb Axles - 5 on 4-1/2

(893)

$105.22

Dexter Trailer Idler Hub Assembly for 3,500-lb Axles - 5 on 4-1/2

(893)

$88.36

Question:

I have a boat trailer with an axel 1 3/4inch by 2 3/4inch rectangle There are 5 leaf springs. The rim has 5 lugs. The tires are 13inch

asked by: Mel

Expert Reply:

Typically boat trailers with 13-inch tires and a 5-on-4-1/2-inch wheel bolt pattern will have either 2000-lb- or 3500-lb-rated axles. The link provided will show you examples of hub-and-drum assemblies with your bolt pattern and wheel size range that fall into these two weight categories. For example, Dexter hub # 84545BX is for 3500-lb axles while # 8-258-5UC1 is for 2000-lb-rated axles.

The hub assembly you referenced, part # 42655UC1 from Dexter, has a 6-on-5-1/2-inch bolt pattern and is intended for 6000-lb axles. For reference, the linked article shows how to confirm your wheel bolt pattern.

The best way to confirm the capacity of your axle is to check for any markings on the axle itself, such as on a safety/warning sticker or plate. If the axle is the original one that was supplied by the trailer manufacturer then the safety/warning sticker on the trailer might indicate axle capacity. You can also contact the trailer manufacturer with the model and VIN number of the trailer to confirm its capacity and to identify appropriate replacement parts.

expert reply by: Adam R