If you’re upgrading or customizing a motorcycle, rear wheel spacers help ensure a precise wheel alignment, improved stability, and compatibility with aftermarket hubs. This guide highlights five reliable spacer kits designed for Harley, pit bikes, and general motorcycles. It explains who each product is best for, what to check before buying, and practical installation notes. The top picks cover CNC aluminum, steel, and universal fit options to suit different axle sizes. Whether you’re a weekend rider or a professional builder, you’ll find spacers that balance fit, durability, and cost.
| Product | Best For | Key Size Range | Notes |
|---|---|---|---|
| Wheel Axle Spacer Kit 13 Pcs, I.D.1″ – O.D.1-1/2″ | Harley riders needing precise 1″ ID spacers | I.D. 1″ | O.D. 1-1/2″ | CNC Aluminum, black |
| Wheel Axle Spacer Kit 13 Pcs, I.D.3/4″ – O.D.1-1/8″ | Harley and custom builds with 3/4″ axles | I.D. 3/4″ | O.D. 1-1/8″ | Chrome, CNC Aluminum |
| 15mm Motorcycle Wheel Spacers Kit (11 Pcs) | Mini bikes and pit bikes with 15mm axles | Multiple sizes including 5mm–35mm | Includes 11 pieces; universal fit |
| TOFR Chrome 13 Piece OD 1.5″ Wheel Spacer | Harley Touring and Sportster models | OD 1.5″ | fits 1″ axles | Chromed finish |
| 20pcs M12 Spacer Sleeve Bushings Kit | Versatile steel spacers for various bikes | 5mm–35mm variants | Includes 17 bushings and 3 lock nuts |
Wheel Axle Spacer Kit 13 Pcs, I.D.1″ – O.D.1-1/2″ (Harley Compatible)
This kit is designed for Harley motorcycles and custom bobbers with a 1″ axle diameter. Its CNC aluminum construction provides a balance of strength and light weight, helping maintain proper chainline and wheel alignment. Best for riders seeking a durable, rust-resistant spacer set that complements black finishes and custom builds. Suitable for riders who prefer a compact assortment of spacers in a single kit for easy future maintenance. A potential limitation is the fixed ID size; verify axle compatibility before purchase.
Wheel Axle Spacer Kit 13 Pcs, I.D.3/4″ – O.D.1-1/8″ (Harley, Chrome)
Best for Harley models and custom builds that use 3/4″ axles. The set’s chrome CNC aluminum construction supports accurate fits with minimal slop. It’s a versatile option for riders who want multiple spacer sizes within a single kit, aiding precise hub and frame alignment. The product notes emphasize careful size matching to avoid misfit. Choose this if you need a bright chrome finish and reliable CNC precision for a variety of hub and frame configurations.
15mm Motorcycle Wheel Spacers Kit Axle Bushings For XR50 CRF50
This kit targets small-displacement bikes and pit bikes with 15mm axles and 11 pieces in total. It provides a complete set of common spacers (5mm, 10mm, 20mm, 25mm, 30mm, 35mm) and emphasizes universal fit for a range of import motorcycles. Best for enthusiasts who need flexibility across multiple bikes or ongoing projects. A caution: incorrect sleeve size can damage components; measure the original sleeve before buying to prevent misfit or alignment issues.
TOFR Chrome 13 Piece OD 1.5″ Wheel Spacer for 1″ Axle
Best for Harley Touring, Road King, and related models that use a 1″ axle with a 1.5″ outer diameter spacer. The chrome finish complements chrome or polished accents on touring bikes and sportier Harleys. It’s selected for riders who want a straightforward, chrome-plated spacer option with a precise fit. Better for riders who prioritize appearance along with function. A limitation to note is the fixed OD; verify compatibility with existing hubs and frames to avoid clearance issues.
20pcs M12 Spacer Sleeve Bushings Industrial Steel for Motorcycle
This steel kit covers a wide range with 17 bushings and 3 lock nuts, designed for 12mm spacers. It’s a practical choice for riders who need a durable, heavy-duty solution suitable for more demanding riding conditions. Best for projects requiring substantial resistance to vibration and wear, with a generous size range from 5mm to 35mm. Note that the kit’s compatibility depends on your axle and hub dimensions; measure carefully before ordering.
Buying Guide: Key Considerations For Rear Wheel Spacers
- Axle diameter compatibility: Verify the spacer’s inner diameter against your axle to ensure a snug, secure fit without play.
- Outer diameter and clearance: Check hub spacing, brake caliper alignment, and chain or belt clearance to avoid contact or rubbing.
- Material choice: CNC aluminum spacers are lighter and corrosion-resistant; steel spacers offer durability and stiffness in harsh conditions.
- Finish and corrosion resistance: Chrome and anodized finishes resist weather exposure; consider your bike’s aesthetic and environment.
- Installation considerations: Ensure proper alignment of spacers, bearings, and axle nuts or quick-release pins; misalignment can cause wobble or accelerated wear.
- Number of pieces in the kit: For ongoing projects or multiple bikes, a larger kit with multiple sizes reduces future purchases.
- Manufacturer and model compatibility: Always reference your motorcycle’s service manual for intended spacer sizes and torque specs.
Quick Comparison By Use Case
- Harley touring and custom builds needing a sleek black CNC spacer: Best pick is the 1″ ID kit for clean aesthetics and fit.
- Harley models with 3/4″ axles or chrome styling: The 3/4″ ID chrome kit offers reliable fit with a bright finish.
- Mini bikes and pit bikes with 15mm axles: The 15mm kit provides a universal set with multiple sizes.
- Harley and touring models emphasizing chrome appearance: The Chrome TOFR spacer suits this look and fit.
- Versatile projects across various bikes and conditions: The steel M12 sleeve kit delivers durability and broad size coverage.
Frequently Asked Questions
- What should I measure before buying wheel spacers?
Measure axle diameter, hub inner bore, and brake caliper clearance to ensure compatibility. - Can spacers affect motorcycle safety?
Yes. Incorrect size or improper installation can cause misalignment, wobble, or component wear. Always tighten per manufacturer torque specs. - Are aluminum spacers as durable as steel?
Aluminum spacers are lighter and resistant to corrosion, but steel spacers can offer greater stiffness in demanding usage. - Do I need a spacer kit with multiple sizes?
If you own multiple bikes or plan ongoing mods, a universal or multi-size kit provides flexibility and saves future purchases. - Is chrome finish important for spacers?
Chrome finishes improve corrosion resistance and match chrome components, but finish is cosmetic compared to fit and material strength. - How do I avoid choosing the wrong spacer size?
Use the original sleeve dimensions as a reference and confirm hub-to-frame spacing before ordering.