What could cause tyre split like this?
Bicycles Asked by Dandan1 on August 18, 2021
I had a shop convert my Avanti mtb to an ebike. The tyres were replaced (from knobbly to road) as part of the job. I’ve ridden it maybe 5 hours tops for a 3 commutes and a tame off-road ride locally.
I’ve just noticed this split on the outside of the tyre, close to the rim. Lucky I did, because I was just about to take my baby out for a ride, after recently getting a seat added to the back.
What could cause this? I have had my tubes pumped to max 60psi… the bike it stored in an outdoor room that can get warm in summer (though usually doors are open). 
One Answer
Contact your bike shop ASAP - I'd politely ask for a replacement under warranty, looks like a possible manufacturing defect in the photo, unless it happened to get slashed exactly between the threads.
Or could there be someone stabbing your tyre with a sharp craft knife when its parked somewhere ?
You're right not to ride that tyre as-is - the inner tube seems to be visible already and it won't take a lot to herniate out.
Answered by Criggie on August 18, 2021
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