Originally Posted by
sphynx_000
I am putting a pair of old road tires on my commuter bike.
I noticed one tire has started to wear flat, while the other is still rounded and shows very little wear.
I am guessing that the worn tire is from the rear, but am not sure?
Either way should I mount the worn tire on the front or back?
Leave the fresh tire on front., since a failure there is more likely to lead to a crash than one in back.
When the rear tire shows cords, breaks cords and gets lumps, gets side-wall damage, or starts to flat unacceptably often put a new tire on front and move the previous front tire to the back.