Hello Whilst fitting some mudguards I noticed these marks on my rear tyres. All pictures are in separate locations on the tyre and I think there was intermittent rubbing of the tyre in the frame. I have now adjusted this to ensure it doesnt happen again. Should I be concerned? They are marathon tyres and they have done about 2000 miles.
As you can see all the "damage" is on that whitestrip that runs round the tyre.
If you're new please join in and if you have questions pop them below and the forum regulars will answer as best we can.