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| Title: |
  Causes and prevention of rear wheel lock up |
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| Hits: |
5637 |
| Rating: |
Rating:10 Votes:4 (Rating Scale: 1 = worst, 10 = best)
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| Added on: |
27 Feb 2010 |
| Author/Source: |
John Allen |
| Author's email/website: |
n/a |
| Posted by: |
John Allen |
| Comments: |
4 Comment(s)
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By
petert120r
22 Nov 2010
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Really useful. Like many others I suspect, I was fitting the oil seal the wrong side of the holder. All is now clear, especially when used in conjuction with the late lamented Biscuit's cutaway photo.
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By
Ex-member
06 Sep 2016
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EVERYONE SHOULD READ THIS, i have had it happen twice!!!once t 40 mph the other at 10mph
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By
rupert_brun
29 Sep 2023
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My G3 was supplied with the speedo drive in a box and a simple spacer in its place. I've been thinking about fitting the drive, this article has probably saved my neck, thank you.
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By
mjf65
24 Mar 2026
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Unfortunately I spoke to J Allen (author) after this happened to me on my M31. Luckily I was upright when the wheel locked up for a fraction of a second before rotation continued, Upon investigation I was lucky as I have the QD rear wheel. The damage was the bearing ring stripping the threads in the hub. I managed to ride home and all is now repaired with a second hand hub and I have removed the crown wheel in the speedometer gearbox so it can never happen again. A £15 gps cycle speedometer is a much safer option than the original design which is flawed.
The cause was a worn speedometer gearbox which must have jammed and started to unscrew the bearing ring causing the lock up. You have been warned.
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