3.5k TK Trailer Axle – 3500 lb Idler 5 Lug – (4″ Drop)

3.5K 4″ Drop Idler Trailer Axle — 3,500 lb capacity | 5×4.5 bolt pattern | Fully assembled
Upgrade your trailer with this 3,500 lb 4″ drop idler trailer axle. The 4 inch drop lowers your deck height for easier loading and a lower center of gravity, and the spring seats ship loose so you can set your exact spring center during installation.

Axle Specifications:
Load rating: 3,500 lbs (3.5K)
Axle type: Idler
Tube diameter: 2 3/8″ axle tube
Drop: Standard 4″ drop
Hubface/Spring Center: 73″ hubface / loose spring seats
Bolt pattern: 5×4.5
Stud size: 1/2″-20 × 1.99″ (press-in)
Tire compatibility: Fits 13″–15″ tire & wheel assemblies
Spring mount: Loose spring seats (ship unwelded so you can set your exact spring center)
Compatibility: Direct replacement for Dexter, AL-KO, Lippert, and Hayes axles
How to Measure: Hubface is measured from one hub face (where the studs come out) to the hub face on the opposite side. Spring Center is measured from the center of one spring seat to the center of the opposite spring seat.

What’s Included (Pre-Assembled Internal Components):
3.5K TK Drop Axle Beam — 2 3/8″ tube, standard 4″ drop
3.5K TK Axle Hub — 5×4.5
3.5K (3500 lb Capacity) Bearing Kit
3.5K TK axle studs — 1/2″
Key Benefits:
Fully assembled & packed with high-temp axle grease — ready for fast installation
High-strength steel construction — Ensures durability and a smoother highway towing experience
EZ-Lube design — grease the axle via zerk fitting without removing the hub
Ideal For:
RV builds or replacements
Utility trailer conversions
Boat trailer upgrades
Cargo & equipment trailers
Why Buy from The Trailer Parts Outlet?
This Axle is proudly manufactured in the U.S.A.
Fast shipping — order today, ships tomorrow
Bulk & wholesale options available
Financing options
Dedicated expert support