Bike roller is causing deformed tyre? I got a roller of the weekend (to be specific a Tacx Antares). After ridding it for less then 20 minutes my back tire looks like this![enter image description here]( In other words there a lots of bulges. I tried deflating the tire and re-inflating, but they are still there. I can't find anything on the internet concerning this problem. Does anyone know the cause, and solution? **Update** Following Criggie's answer, I bought a roller-specfic tire for my back wheel. Thus far it seems to be holding up much better then the tire shown in the picture. Thus it seems like it was a heat issue with that specific type/make of tire.

Yes - your rear tyre has failed internally through being run under-inflated, combined with the heat generated on the roller surface. As such that tyre is no longer suitable to ride on the road.

Indoor Trainers are hard on rear tyres - at least the ones that use a roller setup to interface resistance with the tyre.

There are roller-specific rear tyres available for this purpose, which have a much harder wearing surface, at the cost of grip. You would not use a trainer specific tyre on the road.

Or you can simply "use up" all those half-worn spare tyres that cyclists seem to acquire over time. I'd continue to use that tyre on a rear roller right through to where you can see cords, which is a lot deeper than I'd use on the road.