If you run Schwalbe Ultremo R tires on your bikes, you might want to keep an eye out for mysterious bulging.

WARNING: Schwalbe ULTREMO R tyres that exhibit bulging should be removed from use immediately. Free of charge replacements will be supplied.

Regrettably some ULTREMO R racing cycle tyres have been supplied into the market that may suffer failure during use due to a mistake in the manufacturing process, as the effected tyres’ carcass layer have not been sufficiently rubberised. In the few tyres concerned, after only a short time in use, the fault becomes clearly visible shown by a bulge due to the carcass layers becoming disconnected.

More information on this issue can be found at the Schwalbe site.