Bearing Spacers

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Bearing spacers are small metal cylinders that fit into a skateboard wheel between the bearings. Their purpose is to reduce the weight distributed to each bearing, which can make your turns smoother and more stable and also extend the life of your bearings. Bearing spacers are totally optional; longboarders and casual skaters likely won't put enough pressure on their boards to ever need them, though they are definitely a good investment if you want to slide, do a lot of tricks, and generally skate hard. Bearing spacers are typically inexpensive, and can be made from steel, aluminum, or other types of metal.

Unlike bearings, bearing spacers are not one-size-fits-all. Bearing spacer size is measured by two things: axle diameter (not to be confused with axle width!) and overall spacer width. For example, 8mm x 10mm is a very common bearing spacer size. The first number (8mm) refers to the diameter of the axle, and the second number (10mm) refers to the overall width of the bearing. Most truck axles are 8mm in diameter, so determining axle size is pretty straightforward--you may even see the first number dropped from some bearing spacer measurements. Determining the overall spacer width you need is not an exact science, but generally large longboard wheels will take 10mm, and skateboard wheels will take 8mm. When you purchase new bearings, the set may come standard with bearing spacers, but they can also be purchased separately.

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To install bearing spacers, begin by sliding in your first bearing. Then flip the wheel over and press the bearing spacer in. It should be held firmly in the wheel core; if the bearing spacer moves or rattles around at all, that's a sure sign that your spacers are too small. Once the spacer has been pressed into place in the center of the wheel, slide the other skateboard bearing into place.

CR Seals (SKF) 450208 Bearing Spacers

1.41 1.5 kN
50 mm 35.5 kN

Timken X1S-56425 Bearing Spacers

2.00 mm 570000 N
280.0000 mm 377000 N

Timken K147767-2 Bearing Spacers

141 kN 46.831 mm
TER 112 44.45 mm

Timken HM926740XA Bearing Spacers

12 mm 0.54 kN
4.75 kN 34000 r/min

Timken X1S93787 Bearing Spacers

HMVC 26E 129.692 mm
130 mm 114.3 mm

Timken X1S3662 Bearing Spacers

0.8 91.5 kN
252 mm 3.5 mm

Timken X1S67790-2 Bearing Spacers

232 kN 169 mm
120 mm 8.8 mm

Timken LM961510EA-2 Bearing Spacers

1.00 mm 200.000 mm
2100 rpm 351000 N

Timken HM840410ES-2 Bearing Spacers

73.00 mm 190.0000 mm
3000 rpm 2000 rpm

CR Seals (SKF) 455031 Bearing Spacers

39.954 mm 299.339 mm
6 PL 60

Timken M719149XS-2 Bearing Spacers

0.5 m/s 4 mm
0.036 kg 25 N/mm²

Timken M719113ES-2 Bearing Spacers

105 ° 30 mm
22 mm 45 N/mm²
1/9