Installing new bearings in your wheels can transform how smoothly your setup rolls, reduces noise, and improves control. This guide walks you through the exact steps, tools, and precautions needed for a clean, reliable installation.
Before you begin, confirming the correct bearing size and compatible hardware will save you time and prevent damage to your wheels or axle components.
| Bearing Size | Wheel Compatibility | Typical Use Case | Key Installation Notes |
|---|---|---|---|
| 608 (8x22x7 mm) | Inline skates, longboards, skateboards | Street and park skating | Standard press fit, shield removal optional |
| 624 (4x13x5 mm) | Small hobby boards, longboard pivots | Light transport and cruising | Often paired with washers for preload |
| 688 (8x16x5 mm) | Tech decks, compact longboards | Technical tricks and tight spaces | Delicate, requires gentle handling and precise fitting |
| 693 (3x10x4 mm) | Mini boards, caster assemblies | Specialty and custom builds | Thin section, benefits from cleaning races before install |
Preparing the Wheel Races
Cleaning and Inspecting the Races
Thorough cleaning of the wheel races removes old grease and metal particles that can cause uneven seating. Use a non-flammable solvent and a soft brush, then dry completely before proceeding.
Inspect the race surfaces for nicks, burrs, or uneven wear, because any imperfection will be transmitted through the bearing and affect performance.
Pressing Bearings Into the Wheel
Using a Bearing Press or Vice
A proper bearing press applies even force to the inner race, preventing damage to the balls and cage. Place the wheel on the press, align the bearing carefully, and apply steady pressure until the bearing sits flush with the wheel body.
If you do not have a press, a large vice with soft jaws and spacer blocks can achieve similar results, but you must avoid tilting the bearing to prevent race damage.
Shield and Sealing Considerations
Choosing Shields and Managing Contaminants
Choose between rubber shields, metal shields, or no shields based on your environment; rubber shields offer better impact resistance, while metal shields provide greater protection against debris.
When installing sealed bearings, avoid removing the existing seals, and only press on the inner or outer race as instructed by the bearing manufacturer to maintain waterproof integrity.
Backspacing, Washers, and Preload
Fine Tuning Wheel Fit and Feel
Adding washers between the bearing and the wheel can reduce backspacing slightly and let you set precise side-loading on the bearings.
Applying light preload during installation tightens the arrangement for responsive rolling, but excessive preload increases friction and wear over time.
Recommended Practices for Long-Lasting Bearing Installation
- Clean both the bearing and the wheel races before pressing to eliminate grit and old lubricant.
- Use a proper bearing press or padded vice to apply even force directly along the inner race.
- Verify correct bearing size and orientation, noting shield placement and any markings.
- Apply a suitable wheel bearing grease to reduce friction and guard against moisture.
- Test spin the wheel after installation, adjusting preload only if you hear or feel binding.
FAQ
Reader questions
How do I know if I pressed the bearing in correctly?
Check that the bearing sits flush with both sides of the wheel, spins freely without wobble, and produces no grinding or roughness when rotated by hand.
Can I reuse old bearings after removing them from wheels?
Only reuse bearings that show no visible damage, retain smooth rotation, and still hold their grease; otherwise, replacing them reduces the risk of sudden failure.
Should I add extra grease when pressing bearings into wheels?
A thin, even layer of fresh high-quality grease inside the race and on the balls helps the bearing seat smoothly and protects against corrosion during installation.
Do I need special tools to install bearings in large off-road wheels?
For large off-road wheels, a sliding hammer or a sturdy press with protective cups is often necessary to avoid bending the rim or race during bearing insertion.