When I apply the front brake I can feel a "shudder" or "pulse" through the front wheel, fork and handlebars. It's faster when I'm travelling faster and slower when I'm moving slower.
I assume there's something wrong with the rim, causing the brake pads to catch (rim braking, not discs). But I've checked the rim carefully and can't see anything. There isn't any ledges and I can't see that parts of the rim are wider than other parts (although I haven't checked with calipers or anything since I don't have any). It's happened since the wheels were new. They're Charge Dish wheels. I've used multiple different brake pads and they have all had this problem (to varying degrees).
How can I diagnose and fix this problem?
Updates based on comments:
- The bike is an SE Lager, about 18 months old. I'm running Conti GP4000S 23mm tyres.
- I've spun the wheel and eyeballed the rim/pad clearance. I can't see any noticeable bulge, but I'm assuming that's what's causing the problem.
- It's a large frame (I'm 6'3")
Thanks for the suggestions. If there is a bulge in the rim can I fix it, or do I need to replace it?