Free printable · Measure parts
Wheel bearing size chart and reverse lookup
Measure bore, outside diameter and width, read the bearing number off the table. Works without knowing what the machine is.
Layout preview of page one. The PDF itself is typeset text, not an image.
Download — free, no email
3 pages. No account, no sign-up, no newsletter. Print it, copy it, hand it to somebody else.
Version v1.0 · September 2026. Opens in your browser's PDF viewer, where you can print directly.
The problem it solves
Wheel and shaft bearings are the one part on these machines that is genuinely standardised — a 6203 is 17 by 40 by 12 millimetres whoever made it — and yet owners still order by guesswork because nobody tells them the number is derivable from three measurements. It is the easiest part on the whole machine to get right, and one of the most commonly got wrong.
Who it is for
- Anyone with a rumbling wheel and an old bearing in their hand
- Owners of a machine with no parts catalogue at all
- Anyone who would rather buy from a bearing supplier than a scooter shop, at a fraction of the price
What is on it
- How a bearing number is constructed
- ISO boundary dimensions for the 6000, 6200 and 6300 series
- True-size bore circles from 10mm to 25mm
- What the seal suffixes mean and why they are not interchangeable
- A record block for every bearing on the machine
How to use it
- 01Check the calibration rule with a steel rule before using the circles.
- 02Measure the bore, the outside diameter and the width of the old bearing.
- 03Find the row that matches all three. If only two match, measure again — the third is what distinguishes the series.
- 04Match the suffix as well: a sealed bearing and an open one of the same number are not the same part.
Use it with the registry
Other sheets you may want
- Mystery part measurement sheetYou are holding a part. Nobody knows what it is called. This sheet records everything a supplier needs in order to find it for you.
- Wheel bolt pattern measuring templateMeasure a bolt circle without a special tool, including the odd-numbered patterns where measuring across two holes does not work.
- Before you order a scooter part: checklistTwelve checks that take ten minutes and prevent the single most common expensive mistake these machines produce.
Free to print, copy, and share — including in forums, clubs and workshops. If you find a mistake on one of these sheets, tell us and it gets corrected. Every sheet carries a version so you can tell which one you have. All printables.