Best Trailer Axle Lift Kit for Torsion and Leaf-Spring Setups

#1 · Best Overall

1. AGILLE 3500 Over-Under Kit

Best for: 2-3/8-Inch Axle Owners.

Why it ranks #1: Specifies 3,500-pound capacity, a 2-3/8-inch round tube, and Dexter K71-384-00 compatibility, with spring seats, U-bolts, tie plates, and nuts.

The 2-3/8-inch round-tube fit is the defining feature of this AGILLE over-under conversion kit, letting compatible 3,500-pound axles change position relative to the leaf springs. That repositioning can provide additional trailer-frame clearance without a major structural modification, making axle diameter and suspension type the key checks before choosing it.

The kit is specified for 3,500-pound axles with 2-3/8-inch round tubes and compatible Dexter K71-384-00 applications using suitable double-eye leaf-spring suspension. Its spring seats, U-bolts, tie plates, and nuts provide the listed components for the conversion, so buyers can plan around a complete set of mounting pieces rather than sourcing those items separately. The over-under arrangement changes the axle's position relative to the springs; it is not a fit for 3-inch or square tubes.

Skip it if you have 3-inch axle tubes; the Generic K71-385-00 kit is listed for 3-inch tubes and 5,200–7,000-pound axles.

This is for owners converting a compatible 3,500-pound, 2-3/8-inch round-tube axle with double-eye leaf springs to gain frame clearance. Check tube shape and diameter first; it does not fit 3-inch or square axles.

Listed on Amazon as: Trailer Axle Lift Kit, Compatible with Dexter K71-384-00, Over Under Conversion Kit for 3500 lb Trailer Axles with 2-3/8" Round Tubes, Includes Spring Seats, U-Bolts, Tie Plates & Nuts

#2 · Highest Lift

2. TXINGMENG LC270682 Riser

Best for: 4,400-Pound Diamond Axles.

Why it ranks #2: Offers a stated 3-1/2-inch lift for 4,400-pound Diamond torsion axles and includes risers and zinc-plated mounting fasteners.

A stated 3-1/2-inch rise between frame and axle is the main draw of this TXINGMENG riser kit, aimed at compatible 4,400-pound Diamond torsion axles. That added height can increase ground clearance and make room for larger tires, while the 9-inch hole spacing helps buyers check the mounting layout.

The LC270682 kit is specified for 4,400-pound Diamond torsion axles and matching LC270682, 164888, or 164882 applications. Its 9-inch center-to-center mounting spacing gives a concrete alignment check, and the listed 3-1/2-inch lift targets extra clearance or larger-tire space. Two risers come with zinc-plated washers, hex nuts, and Grade 5 cap screws, supplying hardware for the stated direct bolt-on installation rather than requiring separate fastener sourcing.

Skip it if you need an over-under conversion for 3,500-pound round-tube leaf-spring axles; AGILLE's K71-384-00 kit is listed for that setup.

For owners of compatible 4,400-pound Diamond torsion axles, this kit offers a defined 3-1/2-inch rise and supplied bolt-on hardware. Match the listed axle application and 9-inch spacing before planning for tire clearance.

Listed on Amazon as: LC270682 Axle Riser Kit 4400# Torsion Axle 3.5" Lift 9" Hole Spacing

#3 · 3500-Pound Torsion

3. YllJYK K71-707-02 Kit

Best for: #10 Torsion Axle Owners.

Why it ranks #3: Fits a #10 3,500-pound torsion axle with a 2-5/8-inch lift and 8-inch hole spacing; its listing specifies bolts, washers, and locking nuts.

The 2-5/8-inch lift and #10 torsion-axle application define this YllJYK kit for tandem 3,500-pound trailer setups. Its 8-inch hole spacing and specified fastener set help buyers evaluate both bracket alignment and installation hardware before committing, rather than treating it as a general-purpose leaf-spring conversion.

This kit is listed as a replacement for Dexter Torflex #10 3,500-pound tandem trailer axles, with axle holes 8 inches on center. That measurement supports a direct check against the existing mounting pattern, while the stated 2-5/8-inch lift gives a defined height change to consider for clearance. Included pieces are four frame spacers, 24 washers, 16 locking hex nuts, and 16 1-1/2-inch hex-head bolts, supplying the specified mounting hardware.

Skip it if you need a 3-1/2-inch lift for a 4,400-pound Diamond torsion axle; TXINGMENG's LC270682 is listed for that application.

This suits buyers with a 3,500-pound tandem Torflex #10 axle seeking the stated 2-5/8-inch lift and supplied mounting hardware. Verify the 8-inch hole pattern against the axle; this is not an over-under spring kit.

Listed on Amazon as: K71-707-02 For Dexter Torflex Lift Kit #10 3500# Trailer Axle – 2-5/8 inch

#4 · 5200-Pound Torsion

4. Generic K71-724-01 Kit

Best for: 5,200-Pound #11 Axles.

Why it ranks #4: Targets a #11 5,200-pound single torsion axle, with a 2-7/8-inch lift and stated 9-inch top mounting-hole spacing.

The specified 2-7/8-inch lift targets single-axle Torflex #11 applications rated at 5,200 pounds, setting this kit apart from generic spring conversions. Its top and side hole measurements provide reference points for checking a compatible torsion axle's bracket layout before installation planning.

This kit is listed for a single 5,200-pound Torflex #11 axle and gives top mounting-hole spacing of 9 inches center to center and side spacing of 9.5 inches. Those measurements can help compare the kit with the trailer's existing bracket layout. The top bracket is listed as 2.5 inches wide, and the axle bracket as 11 inches long, providing further dimensions for the mounting-area check. The stated lift is 2-7/8 inches.

Skip it if you need a 3-1/2-inch lift for a 4,400-pound Diamond torsion axle; TXINGMENG's LC270682 is listed for that axle application.

This suits owners of a single 5,200-pound Torflex #11 axle seeking the stated 2-7/8-inch lift. Compare the 9-inch and 9.5-inch hole spacings and bracket dimensions with your mounting layout before choosing.

Listed on Amazon as: K71-724-01 Fits For DEXTER Torflex Lift Kits #11 5200# Single Axle 2-7/8" Torsion Axle Lift Kit – Trailer Lift Kit Replacement

#5 · 7000-Pound Torsion

5. YllJYK K-71-725-02 Kit

Best for: #12 Torsion Axle Setups.

Why it ranks #5: A #12 torsion lift kit for a listed 7,000-pound tandem axle, with a 3-1/8-inch lift and specified top and side hole spacing.

A listed 3-1/8-inch lift makes this YllJYK kit a specific option for tandem 7,000-pound Dexter Torflex #12 applications. Its mounting-hole measurements give buyers concrete dimensions to compare with the axle and frame before installation, helping narrow the choice to a torsion setup whose bracket layout matches the supplied specifications.

The kit is identified for a 7,000-pound tandem axle and replacement of Dexter Torflex #12 lift hardware, with top mounting holes 9 inches center to center and side holes 9.5 inches center to center. Those measurements help check bracket alignment against the trailer before work begins. The top bracket is 2.5 inches wide and the axle bracket is 12 inches long, useful dimensions for assessing the mounting area. The stated lift is 3-1/8 inches.

Skip it if you have a 3,500-pound #10 torsion axle; YllJYK's K71-707-02 is listed for that axle class and specifies a 2-5/8-inch lift.

Choose this for a tandem 7,000-pound Torflex #12 setup where the listed 3-1/8-inch lift and bracket dimensions suit the mounting layout. Its stated application is specific, so compare axle rating and hole spacing before selecting.

Listed on Amazon as: K-71-725-02 Replace for Dexter Torflex #12 Lift Kit 7000# Axle 3-1/8 inch

#6

6. Cindervane K71-707-01 Kit

Best for: Single-Axle Torsion RVs.

Why it ranks #6: Provides a stated 3-inch lift for compatible single torsion axles rated 2,300 to 4,000 pounds and includes spacers and mounting hardware.

A stated 3-inch rise gives this Cindervane kit a clear purpose for compatible single-axle RV trailers: adding ground clearance for uneven roads. Its listed 2,300–4,000-pound torsion-axle range and side-mounted bracket application help buyers narrow fitment to the suspension configuration described.

The kit is specified for single-axle trailers with torsion axles rated from 2,300 to 4,000 pounds, and for side-mounted axle bracket applications. Those limits make axle rating and bracket orientation the first fit checks. Its approximately 3-inch lift is intended to add clearance, while the included lift spacers, bolts, washers, and locking nuts provide the listed mounting hardware. The supplied components support installation planning without implying compatibility with other axle styles.

Skip it if you have a double-eye leaf-spring setup; DEXTER AXLE's K71-707-01 is listed as a single-axle hanger kit for double-eye springs.

This is for single-axle RV or trailer owners with torsion axles rated 2,300–4,000 pounds and side-mounted brackets who want about 3 inches of clearance. Bracket orientation is an essential fit consideration.

Listed on Amazon as: Torflex Lift Kit for RV Trailers, K71-707-01,Fits #9#10#11#12 Axles

#7

7. SPARKWHIZ 3500 Flip Kit

Best for: 3,500-Pound Leaf-Spring Trailers.

Why it ranks #7: Fits 3,500-pound axles with 2-3/8-inch tubes and 1-3/4-inch springs; the listing states a 4–5-inch lift and includes conversion hardware.

The stated 4–5 inches of lift makes this SPARKWHIZ over-under flip kit an option for 3,500-pound axles with 2-3/8-inch tubes. It also specifies 1-3/4-inch-wide leaf springs, giving buyers key dimensions to check while considering added ground clearance or a change to towing alignment.

This conversion moves the axle relative to the leaf springs and is specified for 3,500-pound axles with 2-3/8-inch tubes and 1-3/4-inch-wide springs. The stated 4–5-inch lift can help address ground-clearance needs or towing alignment, with the actual result presented as a range. The kit includes four U-bolts, two tie plates, two spring seats, four spacers, and eight nuts, so its listed contents cover the main conversion hardware.

Skip it if you have 3-inch tubes and a 5,200–7,000-pound axle; the Generic K71-385-00 kit is listed for that tube size and rating range.

This fits owners seeking an over-under conversion on a 3,500-pound, 2-3/8-inch round-tube axle with 1-3/4-inch springs. Account for its stated 4–5-inch lift range and check those dimensions against your suspension.

Listed on Amazon as: K7138400 Trailer Axle Over/Under Conversion Flip Kit

#8

8. Generic K71-385-00 Flip Kit

Best for: 3-Inch Tube Axle Conversions.

Why it ranks #8: Designed for 5,200–7,000-pound axles with 3-inch tubes and describes moving leaf springs to raise or lower the axle about 2–4 inches.

Compatibility with 3-inch tubes across listed Dexter, Lippert LCI, and other axle applications is the defining feature of this over-under flip kit. It lets owners reposition leaf springs above or below the axle, with an approximately 2–4-inch height change depending on spring thickness.

The kit is listed for 5,200–7,000-pound axles with 3-inch tubes and supports moving leaf springs to the top or bottom of the axle. That makes tube diameter and axle rating central fit checks, while the approximately 2–4-inch height change gives a range to consider for raising or lowering the trailer. The listing identifies it as a conversion kit with the components needed for the swap, but ties the resulting height to spring thickness.

Skip it if you have 2-3/8-inch tubes and a 3,500-pound axle; AGILLE's K71-384-00 kit is listed for that smaller tube size and rating.

Choose this for a compatible 3-inch-tube axle when an over-under spring conversion can address clearance or height. Its listed 2–4-inch change depends on spring thickness, so do not treat it as a fixed lift.

Listed on Amazon as: K71-385-00 5200-7000# Trailer Axle Lift Kit Fits for RV Camper 3" Tube, Over Under Flip Conversion – Trailer Axle U-Bolt Lift Kit Replacement

#9

9. EWESD #10 Torsion Lift

Best for: #10 Single-Axle Torsion Setups.

Why it ranks #9: Lists a #10 3,500-pound single-axle torsion application, 2-5/8-inch lift, and 8-inch hole spacing, but provides few other fit details.

A stated 2-5/8-inch rise defines this EWESD lift kit for a 3,500-pound, single-trailer-axle #10 torsion application. The listing also gives 8-inch on-center holes, offering a concrete spacing measurement for buyers checking whether the axle mounting pattern matches.

The kit is identified as a #10, 3,500-pound single-trailer-axle torsion lift, with a 2-5/8-inch rise between the trailer frame and axle. That height provides a defined target when considering trailer clearance. The listed holes are 8 inches on center, giving a mounting-pattern measurement to compare with the existing setup. The supplied details do not enumerate kit components, so buyers can assess the stated application and dimensions without assuming particular hardware is included.

Skip it if you need a complete listed hardware set for a 3,500-pound #10 torsion axle; YllJYK's K71-707-02 specifies spacers, washers, nuts, and bolts.

This is for owners of a single 3,500-pound #10 torsion axle seeking a stated 2-5/8-inch rise. Check the 8-inch hole spacing against the mounting pattern, and note that included hardware is not itemized.

Listed on Amazon as: Lift Kit #10 3500# -Single Trailer Axle – 2-5/8" Lift Torsion

#10

10. Dexter Torflex Lift Kit

Best for: Double-Eye Spring Hanger Setup.

Why it ranks #10: The listing describes a single-axle hanger kit for double-eye springs, not a stated lift height or torsion riser, making its lift-kit fit less clear.

The included bushing distinguishes this DEXTER AXLE single-axle hanger kit for double-eye springs, providing a listed component for attaching trailer springs to the frame. Buyers considering it should focus on that spring-and-hanger application rather than assuming it is a torsion-axle riser or an over-under conversion.

DEXTER AXLE describes this as a single-axle hanger kit for double-eye springs and says it contains what is needed to attach trailer springs to the trailer frame. The included bushing is an additional named component for buyers planning the hanger assembly. Alloy steel is the listed material. The supplied facts do not state a lift height or torsion-axle rating, so treat this as a spring hanger attachment kit, not a specified-height axle lift.

Skip it if you need a defined 3-inch lift for a single torsion axle; Cindervane's K71-707-01 lists that lift and a 2,300–4,000-pound rating range.

Consider this for a single-axle trailer using double-eye springs when the task is attaching springs to the frame. The listing provides no lift-height figure, so it is not the choice for a specified rise.

Listed on Amazon as: DEXTER AXLE Torflex Lift Kit