How To Change Skateboard Bearings: A Professional Guide To Speed And Precision

To change skateboard bearings, remove the axle nut and speed rings, then use the skateboard axle as a lever to pry the old bearings out of the wheel hub. Press the new bearings in by hand and seat them firmly using the truck axle to ensure they are perfectly flush with the hub's bore. Proper installation requires maintaining an 8mm internal clearance and ensuring speed rings are positioned to prevent friction against the bearing’s inner race.

Essential Preparation and Mechanical Inventory

Before initiating a bearing swap, understand that you are handling precision-engineered components designed to operate at high RPMs under significant radial and axial loads. Skateboard wheels typically utilize the "608" standard bearing size, which measures 8mm for the internal bore, 22mm for the outer diameter, and 7mm in width. Replacing these requires a clean environment to prevent grit from contaminating the new lubricants immediately upon installation.

Equipment and Technical Requirements

• Essential Tools: A dedicated T-tool or a 1/2-inch socket wrench for the axle nuts; a flat-head screwdriver (optional for stubborn shields).
• Replacement Components: Eight new 608-standard bearings, four spacers (if not using built-in bearings), and eight speed rings (two per wheel).
• Cleaning Supplies: Isopropyl alcohol (90%+) and a lint-free microfiber cloth for wiping down the truck hangers and wheel hubs.
• Estimated Duration: 15 to 25 minutes for a full set of four wheels.
• Budget Benchmarks: Standard steel bearings range from $15–$30, while high-performance ceramic sets or precision-Swiss bearings can cost $50–$120.

Comprehensive Mechanical Workflow for Bearing Replacement

The process of changing bearings is more than just swapping parts; it is an opportunity to inspect your hardware for structural integrity. Follow these steps to ensure a professional-grade installation that maximizes roll-time and minimizes vibration.

Step 1: Wheel Assembly Disassembly

Begin by placing your skateboard on its side on a stable surface. Use your 1/2-inch socket to loosen the axle nut. Rotate the nut counter-clockwise until it is removed. Be extremely careful not to lose the speed rings—these are the thin washers that sit on either side of the wheel. There should be one speed ring between the truck’s hanger and the inner bearing, and another between the outer bearing and the axle nut.

Warning: Do not use power tools like impact drivers to remove axle nuts. The high torque can easily strip the 5/16-inch threads of the truck axle, rendering the entire truck useless.

Step 2: The Axle Lever Extraction Technique

Once the nut and the outer speed ring are removed, pull the wheel halfway off the axle so that only the inner bearing is hooked onto the tip of the axle. Grip the wheel firmly and use the axle as a lever, prying the wheel at an angle away from the truck. This force will pop the bearing out of the plastic wheel hub without damaging the bearing seat. Flip the wheel over and repeat the process for the second bearing in the same wheel.

Step 3: Hub Inspection and Debris Removal

Before inserting new bearings, inspect the internal "seat" of the wheel hub. Use a cloth to remove any accumulated road grime, hair, or metal shavings. If the hub is stretched or deformed from high-impact landings, the new bearings may "slop" or rattle. Ensure the hub is bone-dry; any moisture trapped inside will eventually lead to oxidation (rust) on the outer race of your new bearings.

Step 4: Installing the New Bearings

Take your new bearing and identify the shield side. Most bearings have a colored rubber or metal shield on one or both sides. If the bearing has only one shield, the open side (where you can see the balls and retainer) must face the inside of the wheel to protect it from dust.

Place the bearing on the axle first, then press the wheel down onto the bearing using your body weight. You should hear or feel a "click" or a firm seat. If you are using spacers—small metal cylinders that sit between the two bearings—drop the spacer onto the axle after the first bearing is installed, then press the second bearing in on top of it.

Pro-Tip: If the bearings are difficult to press in by hand, place the wheel on the ground and use the truck axle as a press. Ensure the bearing is perfectly horizontal before applying pressure to avoid "cocking" the bearing, which can permanently damage the wheel hub.

Step 5: Final Tensioning and The "Rattle" Rule

Slide the inner speed ring onto the axle, followed by the wheel assembly, then the outer speed ring. Thread the axle nut back on by hand to avoid cross-threading. Tighten the nut with your tool until the wheel no longer moves side-to-side on the axle, then back the nut off approximately 1/16th to 1/8th of a turn.

The goal is to have the smallest possible amount of lateral play. This ensures that the inner races of the bearings are not being crushed, which causes friction and heat, leading to premature bearing failure.

Skateboard Bearing Specifications and Material Standards

The choice of bearing material and the precision of its manufacture directly impact top speed and durability. While many manufacturers use the ABEC rating system, it is important to note that ABEC was designed for industrial machinery, not the side-loads experienced in skateboarding.

Solving Common Rotation Issues and Mechanical Friction

Even with new hardware, you may encounter performance bottlenecks. Most issues during a bearing change arise from improper seating or neglected secondary hardware.

• Wheel Stops Spinning Almost Immediately

  
  
  
  • Root Cause: The axle nut is over-tightened, compressing the bearing shields against the internal balls, or the speed rings are missing, causing the nut to rub against the outer race.
  • Actionable Fix: Loosen the axle nut by a quarter turn. Verify that a speed ring is present on both sides of the wheel to ensure the nut only contacts the inner race.

• Audible Clicking or "Crunching" Noise

  
  
  
  • Root Cause: A bearing is seated at a slight angle (cocked) or the spacer is vibrating because it is not the correct width for the wheel hub.
  • Actionable Fix: Remove the wheel and re-seat the bearings. If using spacers, ensure they are 10mm width for standard wheels; if the noise persists, check for grit that may have entered the bearing during the install.

• The Wheel Rattles Excessively Side-to-Side

  
  
  
  • Root Cause: The axle nut is too loose, or the bearing seats in the wheels are "blown out" (stretched).
  • Actionable Fix: Tighten the axle nut until the play is minimized. If the bearing can be moved inside the wheel hub with your finger, the wheels must be replaced as the structural integrity of the hub is compromised.

Frequently Asked Questions

Should I remove the shields from my bearings for more speed?

Removing shields, often referred to as riding "raw," allows the bearings to spin more freely in a laboratory setting but is detrimental in the real world. Without shields, dust and microscopic debris enter the races immediately, creating a grinding paste that destroys the polished surfaces of the balls and races within hours of use.

What is the difference between ABEC 7 and ABEC 9 bearings?

The ABEC scale measures tolerances for dimensions and geometry, with higher numbers indicating tighter tolerances. However, for skateboarding, the quality of the lubricant and the strength of the steel are often more important than the ABEC rating, as the shocks of landing tricks far exceed the precision limits of the ABEC scale.

Can I use WD-40 to lubricate my new bearings?

Never use WD-40 on skateboard bearings. WD-40 is a solvent and a light lubricant that evaporates quickly and leaves behind a sticky residue that attracts dirt. Instead, use a dedicated synthetic high-speed lubricant (often called "speed cream") which is designed to withstand the heat and friction specific to small-bore bearings.

How do I know when it is time to change my bearings instead of cleaning them?

If a bearing feels "crunchy" even after a deep cleaning with isopropyl alcohol, or if you see visible pitting and dark discoloration on the steel balls, the metal has reached its fatigue limit. Additionally, if the inner race has significant "play" or wobbles within the outer race, the bearing is structurally compromised and should be replaced for safety.

Optimize Your Ride Quality

Regularly maintaining your hardware ensures that your skateboard remains a high-performance machine rather than a liability. Upgrade to a premium set of bearings today to experience decreased rolling resistance and increased consistency in your lines.