Old yarn - friction?

**Richard Mc F** · 13th December 2011, 08:30

Originally Posted by Katman

Not that rim locks are used on road bikes.

The wheel would be impossible to balance.

As I recall my 1972 bonniville had them

**MSTRS:Me** · 13th December 2011, 09:10

I used rimlocks on a TS125, after tearing one tube valve off.
I guess that no matter the air pressure in there, the grip a tyre bead has against the rim is very low compared to a tubeless tyre. Otherwise, why is a tube necessary? (yes, I know, spoke holes...)

**unstuck** · 13th December 2011, 10:04

Only ever seen it on a tractor, not the hardly davidson type either.

**Paul in NZ** · 13th December 2011, 10:33

Originally Posted by unstuck

Only ever seen it on a tractor, not the hardly davidson type either.

If you look at the typical 'Trade Dunlop' WM3 on the back of a US spec pom bomb you will usually notice it has 40 spoke holes, 1 valve hole and 2 rim lock holes.... It was reasonably typical....

**Katman** · 13th December 2011, 10:41

Hey listen, bikes didn't exist before 1980. Ok?

**Paul in NZ** · 13th December 2011, 11:49

Originally Posted by Katman

Hey listen, bike's didn't exist before 1980. Ok?

Quite correct - they only had 'motor cycles' back then, you know, real things made of iron n steel n aluminium n stuff. No 'bikes' which are all plastic n horrible with too many cylinders and too many camshafts all in the wrong places... Bah!

**Grumph** · 13th December 2011, 12:09

You forgot....they weren't "designed" or "styled" by a bunch of poncy Europeans either...they were just as the engineers thought they should be.

Early Jap chrome rim with no serrations round the bead - hell yes - a very possible scenario,

As for rim locks - even Manx nortons came with them - eff'n hard dunlop triangulars could and did move on the rim without them.