Hi all.

Bit of a newbie to road cycling and have just started commuting to work on a Trek 1.1. I got my first flat a couple of days ago and replaced it with a brand new presta 48 inner tube. Ever since, it feels like my rear wheel's riding over a little stone every single rotation of the wheel.

I've deflated the tire twice and had a play with the positioning of the inner tube but the problem still persists. It's definitely not a break/break pad issue.

Any help would be greatly appreciated.