Tyre problems - they're not round
Hi, this is my first post and i know little about bikes.
I've got a fairly old (3 years) mountain bike, with the full knobblies, I need to start commuting on bike so i want to switch to slicks and if i'm fairly fast i might buy a road bike. I bought some slicks (and smaller inner tubes too) and tried to put them on, everything went smoothly, tyres on, I went for a test ride and found that every time the tyres go round, I feel a bump. On closer inspection it seems like both of the tyres aren't being pushed out enough so the rims and the tyres arent hooking properly, instead the rims are rubbing against the side walls at those points.
This has happened to both front and rear tyres and i've tried several tyres to take them off and put them back on. It seems to happen furthest from the valve but not 100% sure about that.
Any help would be much appreciated.