Consistent circular cuts around the valve

[Anthony]

Magics are front and rear specific, front is skinnier. I could try it to definitly rule out the rim as the cause of the cuts, but the tyre dragging the inner tube about sounds so plausible and is also consistent with the shape and location of the cuts that i think it won't be necessary.

Everything Andy says is plausible!

I know they are front and rear specific, but it might help you establish whether the Magics are incompatible with your rim, or whether there is a fault with the bead of that particular tyre.

The fact that you have a Schraeder-size hole which is cutting a Presta tube, even with the lock nut tight (presumably) makes me suspect that you need a rim with a Presta-size hole - a Presta tube locked onto a Presta-size hole might work, even if the Magics are moving slightly.

[I seem to recall you used to be able to buy adapters to convert Schraeder holes into Presta holes]

I would assume that the greater the pressure, the less tyre movement you should get. But if there is a fault with the bead, there may be no solution to the problem.

 

[Andy R]

Magics are front and rear specific, front is skinnier. I could try it to definitly rule out the rim as the cause of the cuts, but the tyre dragging the inner tube about sounds so plausible and is also consistent with the shape and location of the cuts that i think it won't be necessary.

Everything Andy says is plausible!

If only it was so, Anthony

However, the suggestion to convert to ghetto tubeless wasn't (in this instance :roll: ) some facetious throw -away line.

Eighteen months ago I fitted a pair of Michelin XC Dry tyres to the Kona Kilauea that I have out in Greece, and while they were ideal for the dry, dusty conditions of a Greek summer I couldn't stop them from creeping on the rims (whatever Mavic variant was OEM on '95 Kilaueas). It was probably made worse by high (+38 degree) temperatures.
In the end I gave up with them.
However, I built a new pair of wheels for the Kilauea (Hope Pro2/Mavic 717) and decided to try the Michelins run "ghetto" tubeless. Although they seem a loose fit, they inflated with just a track pump and with 60ml. of Stan's in each were faultless through fifteen weeks of riding. Not a burp, no appreciable pressure loss in spite of picking up dozens of thorns.
It wouldn't be an exaggeration to say that they transformed my riding experience - I'm hoping that they'll be as good when I'm back there in a couple of week's time.

So these things are worth a try......

 

[REKIBorter]

Or convert them to ghetto tubeless.....

Swearbox!