Forum menu
The Specialized tyre on Mrs Davids bike has started to slip round on the rim (XC717). It moves to such an extent that if you start the ride with the valve vertical within 3-4 miles you'll have torn the valve off as the tyre has moved round and taken the tube with it.
I've tried cleaning the tyre bead/rim, with/without talc in the tyre and am now stumped as the back wheel has exactly the same tyre/rim combination and is fine and until 2 weekends both tyres had been staying out and working fine for over a year.
Anybody got any sneaky tips/handy hints or is it time for a new tyre?
Cheers.
DAVE
rim locks?
have to be putting down some serious horsepower to move it with one of these fitted*
*might be a little excessive
I had this years ago with a mavic 717 and a fire xc - a liberal coating of talc on the tube sorted it fine. How much talc did you use?
You coukld stick one bead to one rim wall, provided you leave the other side free for changing punctures. Or go ghetto 😉
try a double thinkness of rim tape and make sure the rim tap is wide enough
Could try cleaning the outside of the tyre around the bead thoroughly, perhaps also roughen up the inner edge of the rim with some sandpaper to help the inflated tyre grip the rim when pumped up and talc the tube.
I've also cuts a little 'X' ina bit of old innertube and threaded it over the valve of an innertube before fitting, just to pack the rim valve hole away from the innertube a bit before too.
Lightly file the valve hole with a needle file if its sharp/got sharp edges.