Best 3500 lb Trailer Axle Kit for Single and Tandem Setups

#1 · Best Overall

1. Trailer Parts Outlet Single Axle Kit

• Weight: 84 lb

Best for: Complete light-duty single-axle builds.

Why it ranks #1: The 89-inch hub face, 74-inch spring center, and 5×4.5 pattern pair with an idler axle, springs, hangers, and U-bolt kits.

The pre-packaged bundle pairs a fully assembled 3,500 lb idler axle with leaf springs, hangers, and U-bolt kits, giving small utility-trailer builders the core running gear in one purchase. Its 89-inch hubface, 74-inch spring center, and 5-on-4.5 bolt pattern define the setup it supports.

The included double-eye hanger kit, four-leaf double-eye springs, and two 1.75K U-bolt kits bring suspension mounting parts alongside the axle, helping consolidate a single-axle installation. The 89-inch hubface and 74-inch spring center are key layout dimensions for planning the frame and wheel position, while the 5-on-4.5 pattern specifies the hub bolt arrangement. High-carbon-steel construction and OEM-grade parts suit utility, cargo, and ATV trailer applications.

Skip it if you need electric braking in the supplied kit; Johnson Trailer Parts' Dexter 3,500 lb Tandem Trailer Axle Kit includes electric brake axles.

A practical choice for a builder assembling a light-duty single-axle utility, cargo, or ATV trailer who wants axle and suspension components together. Check that the 89-inch hubface and 74-inch spring-center layout suit the intended frame.

Listed on Amazon as: 3500 lb Light Duty Single Trailer Axle Kit with Suspension – Leaf Springs, Hanger & U-Bolt kit (89" Hubface – 74" Spring Center, 5×4.5 Bolt Pattern)

#2 · Best Tandem Brake Kit

2. Dexter Tandem Brake Kit

• Weight: 200 lb

Best for: Tandem builds needing electric brakes.

Why it ranks #2: Includes two 3,500 lb electric-brake axles, springs, U-bolt kits, and tandem hangers; listed tandem capacity is 7,000 lb.

Two Dexter 3,500 lb electric-brake axles give this tandem kit a stated combined capacity of 7,000 lb, bringing braking and suspension running gear together for a trailer upgrade. The 95-inch hubface, 80-inch spring center, and 5-on-4.5 pattern specify its fit dimensions and wheel-bolt layout.

The kit combines two electric-brake axles with double-eye leaf springs, U-bolt kits, and tandem hangers, equalizers, and shackles, reducing the need to assemble those running-gear categories separately. Its 95-inch hubface and 80-inch spring center are specified for an 82-inch-wide trailer frame, providing concrete dimensions for fit planning. E-Z Lube is included as a feature, making this a relevant option for buyers who want that axle maintenance setup.

Skip it if you are replacing only one axle; Jecoupoon's 3500lb 85 70 Trailer Axle Kit is a single-axle option with stated dimensions.

This kit suits tandem utility, cargo, boat, or landscape trailer owners seeking electric brakes and coordinated suspension hardware. Its 95-by-80-inch dimensions and specified 82-inch frame fit make layout compatibility an important boundary.

Listed on Amazon as: Dexter 3,500 lb Tandem Trailer Axle Kit – Electric Brake Axles – Full Suspension Running Gear Kit – 95” Hub Face / 80” Spring Center – E-Z Lube – Made in USA – 7,000 lb Capacity

#3 · Mixed Axle Setup

3. Johnson Tandem Axle Kit

• Weight: 200 lb

Best for: Complete tandem brake-and-idler setups.

Why it ranks #3: Combines an electric-brake axle and an idler axle with springs and tandem suspension hardware, using 95-inch hub face and 80-inch spring center.

Pairing a Dexter electric-brake axle with a Dexter idler axle, this 7,000 lb tandem kit gives builders two axle roles in one running-gear package. Its 95-inch hubface, 80-inch spring center, and 5-on-4.5 pattern target most 82-inch-wide trailer frames, according to the fit specifications.

The complete kit adds double-eye leaf springs, U-bolt kits, and a tandem hanger set with equalizers, shackles, and hardware, helping consolidate mounting and suspension parts for a tandem installation. A 2-3/8-inch axle tube and 5-lug, 4.5-inch bolt pattern provide additional setup details, while the 95-by-80-inch dimensions guide frame layout. The mix of brake and idler axles suits buyers needing both configurations in one system.

Skip it if you need electric brakes on both axles; Johnson Trailer Parts' Dexter 3,500 lb Tandem Trailer Axle Kit lists two electric-brake axles.

A strong match for builders or repairers setting up a tandem trailer with one brake axle and one idler axle. Its stated 95-by-80-inch geometry and fit for most 82-inch frames remain essential layout checks.

Listed on Amazon as: 3500 lb Tandem Trailer Axle Kit, 95 in Hub Face, 80 in Spring Center, 5 on 4.5 Bolt Pattern, Electric Brake and Idler Axles, Complete Install Kit

#4

4. Jecoupoon 85/70 Axle

• Weight: 61.6 lb

Best for: Single-axle 85-by-70 replacements.

Why it ranks #4: A 3,500 lb axle with an 85-inch hub face, 70-inch spring center, and 5 on 4.5-inch bolt pattern suits matching single-axle replacements.

An 85-inch hubface paired with a 70-inch spring center gives this 3,500 lb Jecoupoon axle a clearly stated layout for buyers matching a single-axle trailer setup. The five-lug, 4.5-inch bolt pattern defines its wheel attachment, while the listing emphasizes stable fitment for varied trailer configurations.

The 3,500 lb rating identifies the stated load capacity, and the 85-inch hubface plus 70-inch spring-center measurements help determine whether the axle aligns with a trailer's wheel and suspension layout. Its 5-on-4.5 pattern specifies the hub's five-lug arrangement, useful when planning wheel compatibility. The package list describes one axle, rather than a complete suspension bundle, so buyers should account for the rest of the running gear separately.

Skip it if you need springs and tandem suspension hardware bundled together; Johnson Trailer Parts' 3500 lb Tandem Trailer Axle Kit includes those components.

A fit for trailer owners replacing or specifying a single axle with an 85-by-70-inch layout and five-lug 4.5-inch hubs. It is an axle-only purchase, so plan separately for springs and suspension mounting parts.

Listed on Amazon as: 3500lb 85 70 Trailer Axle Kit 5 on 4.5" Bolt Pattern

#5

5. Replacement 89/74 Trailer Axle

• Weight: 61.9 lb

Best for: Precision-machined 89-by-74 axles.

Why it ranks #5: Lists an 89-inch hub face, 74-inch spring center, 5×4.5 pattern, and 3,500 lb rating, but is an axle rather than a complete suspension kit.

Precision machining and a balanced axle structure distinguish this 3,500 lb replacement axle, with the listing linking balance to reduced vibration and improved handling. Its 89-inch hubface, 74-inch spring center, and five-lug 5-by-4.5 pattern give buyers concrete dimensions for matching a trailer's running gear.

The 2-3/8-inch tube diameter and solid-steel construction supply specific build details, while the 3,500 lb rating defines the stated capacity. An 89-inch hubface and 74-inch spring center help establish whether the axle aligns with the trailer's wheel and spring positions. The listing also names compatibility as a replacement for Dexter, AL-KO, and Hayes, giving owners of those axle brands a reference point when planning a replacement.

Skip it if you need a full tandem suspension package with electric brakes; Johnson Trailer Parts' Dexter 3,500 lb Tandem Trailer Axle Kit includes both axles and running gear.

A fit for owners replacing a single axle whose 89-by-74-inch layout, 2-3/8-inch tube, and five-lug pattern match the trailer. The listing's replacement-axle focus means suspension and brake components are separate considerations.

Listed on Amazon as: 3500 lbs Trailer Axle 89" Hub Face 74" Spring Center, 5 x 4.5 Bolt Pattern

#6

6. Jecoupoon 73/58 Axle

• Weight: 50.9 lb

Best for: Buyers matching a 73-by-58 layout.

Why it ranks #6: The 3,500 lb axle lists a 73-inch hub face, 58-inch spring center, and 5-lug 4.5-inch pattern; its package description also lists other sizes.

The stated 73-inch hubface and 58-inch spring-center dimensions give this 3,500 lb Jecoupoon axle a defined fit target for trailer builders replacing or specifying running gear. Its five-lug, 4.5-inch bolt pattern connects that layout to a common wheel-mounting configuration for small and medium trailers.

The 3,500 lb maximum load capacity identifies the axle's stated rating, while the 73-inch hubface and 58-inch spring center help a buyer compare its width and suspension-mount spacing with a trailer frame. The five-hole, 4.5-inch bolt pattern specifies the lug arrangement at the hubs. The package description also lists 61/46- and 95/80-inch axle dimensions, so verify which listed configuration applies before planning an installation.

Skip it if you want suspension and brake components in the same purchase; Johnson Trailer Parts' 3500 lb Tandem Trailer Axle Kit includes springs, hangers, and an electric-brake axle.

Consider it when your project calls for a 3,500 lb axle and the 73-inch hubface, 58-inch spring-center, and five-lug pattern match your trailer plan. The multiple size sets in the package description need resolving before installation.

Listed on Amazon as: 3500 lbs 73/58 Trailer Axle kit 5 4.5 Bolt Pattern

#7

7. Nakkaa 89/74 Axle

• Weight: 57.9 lb

Best for: 89-by-74 single-axle replacements.

Why it ranks #7: This solid integral axle is rated at 3,500 lb and titled with an 89-inch hub face and 74-inch spring center, but included suspension parts are not specified.

The 89-inch hubface and 74-inch spring-center dimensions identify this Nakkaa axle's intended layout, while its 3,500 lb rating addresses light-duty trailer applications. A solid integral axle format provides the central running-gear component for buyers replacing an axle rather than sourcing a complete suspension kit.

Nakkaa describes this as a solid integral axle with a 3,500 lb static and dynamic load-bearing capacity, giving the buyer a stated rating for a light-duty trailer build. The 89-by-74-inch dimensions help compare wheel-end spacing and spring placement with the trailer's existing layout. Because the supplied product details identify an axle rather than a bundle of suspension parts, this option keeps the purchase focused on the axle component.

Skip it if you need an axle plus springs, hangers, and U-bolts together; The Trailer Parts Outlet's 3500 lb Light Duty Single Trailer Axle Kit bundles those parts.

Choose this for a light-duty trailer project when the 89-inch hubface and 74-inch spring-center layout match and you need the axle component. It is not presented as a complete suspension running-gear bundle.

Listed on Amazon as: Nakkaa 89 74 3500 lb Trailer Axle 5 on 4.5" Bolt Pattern

#8

8. GXYWADY Axle with U-Bolts

• Weight: 83.8 lb

Best for: Axle replacements with U-bolts.

Why it ranks #8: A 3,500 lb, 5-lug axle with 2-3/8-inch tubing includes a U-bolt kit, though hub-face and spring-center measurements are not supplied.

A U-bolt kit is included alongside this 3,500 lb GXYWADY axle, giving replacement buyers mounting hardware with the axle itself. The listing specifies five-lug hubs, a 2-3/8-inch axle tube, 1/2-inch studs, and 1-1/16-inch spindles to guide component planning.

The 3,500 lb per-axle rating establishes its stated capacity, while the five-lug hub and listed stud and spindle sizes provide concrete details for checking a replacement setup. A 2-3/8-inch tube diameter further informs the axle specification. GXYWADY describes the structural design as easy to mount, and the included U-bolt kit can support mounting work; the package contents list one axle with that kit, rather than a broader suspension bundle.

Skip it if you want springs and tandem suspension hardware bundled with the axle; The Trailer Parts Outlet's 3500 lb Light Duty Single Trailer Axle Kit includes springs and hangers.

Consider it for a single-axle replacement where the five-lug hubs, listed stud and spindle sizes, and 2-3/8-inch tube match the project. The included U-bolts do not make it a complete suspension kit.

Listed on Amazon as: GXYWADY 3500lbs Trailer Axle 5 Lug 4.5 with U Bolt Kit

#9 · Best Fabrication Kit

9. BYOAK Square Spindle Kit

Best for: Custom square-tube axle fabricators.

Why it ranks #9: Designed for custom work with 2-inch square tubing, its weld-on spindles are rated at 1,750 lb per side; it is not a complete axle.

Square weld spindles rated at 1,750 lb per side make this BYOAK kit a fabrication component for creating a 3,500 lb axle assembly. It targets builders using 2-inch square trailer tubing, commonly with a 1/4-inch wall, rather than buyers seeking a ready-made complete axle.

Each spindle has a 1.5-inch square weld end and a stated 1,750 lb rating per side when properly installed, giving fabricators a defined basis for assembling the 3,500 lb-rated axle. The kit is intended for 2-inch square trailer tubing, commonly 1/4-inch wall, so the buyer supplies the structural tube and handles welding. That makes it relevant to custom utility and small-equipment trailer projects, but not a drop-in axle replacement.

Skip it if you need a ready-made axle instead of welding spindles to tubing; Jecoupoon's 3500lb 85 70 Trailer Axle Kit lists a complete axle.

Best suited to a fabricator assembling or repairing a custom 3,500 lb axle for a utility or small-equipment trailer. It requires the specified square tubing and proper spindle installation, so it is not a turnkey axle kit.

Listed on Amazon as: BYOAK-84-H545-SQ 3500lb Trailer Axle Kit 5 on 4.5" Square Weld Spindles

#10

10. BYOAK 5-on-5 Idler Kit

Best for: Custom 5-on-5 idler-hub builds.

Why it ranks #10: This fabrication kit supplies 5-on-5 idler hubs and hardware but requires a separate 2-inch schedule 40 axle tube, limiting its use as a complete kit.

Five-on-5-inch idler hubs with a stated 3,500 lb axle capacity make this BYOAK kit a focused choice for custom fabrication or axle repair. It supplies spindles, bearings, grease seals, and mounting hardware for builders using standard 2-inch schedule 40 steel pipe as the axle tube.

The package includes SP-20084NWC spindles, L44649 outer and L68149 inner bearings, and 10-19 grease seals, giving a fabricator specified hub-related components for a 3,500 lb setup. Dust caps, spindle nuts, washers, and lug nuts add installation hardware. The kit is designed around standard 2-inch schedule 40 pipe, but the axle tube is not included, so the buyer must source it and assemble the axle rather than install a complete axle unit.

Skip it if you need a complete axle with the tube already supplied; Nakkaa's 89 74 3500 lb Trailer Axle is listed as a solid integral axle.

Aimed at fabricators and repairers building a custom 3,500 lb axle with 5-on-5 idler hubs and 2-inch schedule 40 pipe. The axle tube is excluded, so it requires sourcing and assembly work.

Listed on Amazon as: BYOAK-84-H550-2.0R 3500 lb Trailer Axle Kit 5 on 5 Idler Hubs