Originally Posted by
FastJake
Yep.
1. The problem is NOT the brifters.
2. The problem is NOT the Ultegra calipers. Dual pivot brakes are very strong.
3. The problem is NOT the brake pads. Kool Stop makes good stuff.
Unless something is broken or defective, that leaves the cables and housing and how far the pads are from the rim.
I'd try Jagwire ripcord cable housing. It's compressionless.