I've just been looking at the side wall of a Schwalbe Marathon tyre where it says "For crotched type rims only".
Never noticed it before. What is a crotched type rim please?
Crotched type rims
Re: Crotched type rims
Never heard of it before, but from Cycle Chat.......
"They mean croched rims ( from the French for hook ) "
"They mean croched rims ( from the French for hook ) "
- Tigerbiten
- Posts: 2503
- Joined: 29 Jun 2009, 6:49am
Re: Crotched type rims
There's a ridge on the inside of the rim that helps to hold the tyre bead in place under high pressure.
Luck .........
Luck .........
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- Posts: 7862
- Joined: 7 Mar 2009, 3:31pm
Re: Crotched type rims
It's the same the whole world over
It's the poor what gets the blame
It's the rich what gets the pleasure
Isn't it a blooming shame?
It's the poor what gets the blame
It's the rich what gets the pleasure
Isn't it a blooming shame?
Re: Crotched type rims
Well I've also just bought a pair of 'Slug-Masters' (Marathon Plus) tyres and noticed the 'For Crotched Type Rims'. I've never heard of them either so punched it into Google/Safari and ended up here.
Four punctures over the last few weeks (roughly 600 Km) in admittedly slightly worn Marathon Supremes has got the better of me.
A SLOW roll to Spring eh?
Four punctures over the last few weeks (roughly 600 Km) in admittedly slightly worn Marathon Supremes has got the better of me.
A SLOW roll to Spring eh?
Re: Crotched type rims
Another term for 'Hook Bead Rims' I believe. (As the illustrations above)
Part of the rim is designed to hook the bead in .
I have a couple of Classic Bikes and they don't have hook bead rims so have to be a bit careful fitting tyres and what pressure I use.
Most of my tyres say 'Use on hook bead rims only'
Part of the rim is designed to hook the bead in .
I have a couple of Classic Bikes and they don't have hook bead rims so have to be a bit careful fitting tyres and what pressure I use.
Most of my tyres say 'Use on hook bead rims only'
Re: Crotched type rims
Five for me in January (Only two for the whole of 2022) 3 thorns, a shard of glass and a mystery. Tyres were - Almotion (3) Supreme (1) standard pre Greenguard Marathon (1)
I've put it down as a run of bad luck, but if it continues at this rate I will have to start looking at alternatives.
Re: Crotched type rims
I have the club record for punctures as in 6 in one day. It was on my return after some time away on old tyres (Michelin Zig Zag)
Also have the club record for most unusual puncture. Carrying Trike over my head over a narrow bridge, caught a back wheel in a hawthorn bush .
Now generally running Panaracer Pasela's ( on 27's) and Continental on 700's .
Also have the club record for most unusual puncture. Carrying Trike over my head over a narrow bridge, caught a back wheel in a hawthorn bush .
Now generally running Panaracer Pasela's ( on 27's) and Continental on 700's .