GOFIRA 15mm Motorcycle Wheel Spacer Kit — 11-Piece Steel Axle Bushings for XR50/CRF50 50–160cc, Precision-Machined

If your mini bike or pit bike needs correct wheel spacing or you’re replacing worn axle sleeves, this GOFIRA kit gives you a range of common thicknesses in one compact set. The kit contains six popular sleeve thicknesses to cover most adjustments, all with a 15mm inner bore to slide over standard 15mm axles used on XR50, CRF50 and similar models. These steel bushings are built to resist wear and keep wheel alignment stable under load.

Which sizes are included and why do they matter?

This set bundles six thicknesses—5mm, 10mm, 20mm, 25mm, 30mm and 35mm—totaling 11 pieces to cover left/right combinations and quick replacements. Using the right spacer thickness prevents axle binding, avoids improper bearing loads, and preserves correct chain and brake alignment.

• 11 total bushings for spare and paired use
• 15mm inner diameter to fit standard pit/mini bike axles
• Multiple thicknesses let you dial in wheel offset and clearance
• Helps maintain correct brake and sprocket alignment

How does material and machining affect performance?

These bushings are machined from high-grade steel for toughness and long service life. Steel offers strong wear resistance and better heat dissipation than softer metals, so spacers keep their shape under pressure and temperature cycles encountered on the trail or track.

• Precision machining for consistent diameter and concentricity
• Steel construction resists deformation under load
• Improved thermal conductivity reduces heat buildup at the hub
• Finish prevents premature wear of axle and bearing surfaces

What installation checks should I do before fitting these spacers?

Measuring the existing sleeve and axle is essential—an incorrect spacer thickness or bore fit can damage bearings, forks, or the wheel hub. Verify the axle diameter is 15mm and confirm the required spacer thickness by measuring brake rotor to swingarm clearance and hub shoulder distances before installation.

• Confirm axle outer diameter is 15mm before use
• Measure current sleeve length and hub spacing for correct selection
• Install one side, torque axle to spec, then recheck alignment
• If unsure, consult a mechanic or contact GOFIRA support

Will these spacers work with my bike model?

The kit is tailored for small-displacement off-road bikes and many imported mini bikes that use a 15mm front or rear axle. Common fits include XR50 and CRF50-style pit bikes and 50–160cc mini/dirt bikes, but compatibility depends on axle specification and hub geometry, so measure before buying.

• Designed for most 15mm-axle pit and mini bikes (50–160cc)
• Useful as a universal spare set for multiple bikes in a garage
• Not for axles with different inner diameters or proprietary spacers
• Contact GOFIRA for fitment questions prior to purchase

Who is this for: Riders, mechanics, and weekend wrenchers who need a reliable assortment of axle spacers for mini and pit bikes. If you maintain more than one small off-road bike, perform wheel work often, or want spare sleeves for field repairs, this compact GOFIRA kit gives flexible sizing, durable steel construction, and straightforward installation options to keep wheels running true.