Mine's notoriously bad, but I found that going from little to big ring if it doesn't shift, I cycle the gears to a higher one at the back, and the difference in tension seems enough to force it onto the big ring. Not a solution, but a workaround if it happens whilst out on a ride. Never had a lever jam though. Sounds bad!
Mine's notoriously bad, but I found that going from little to big ring if it doesn't shift, I cycle the gears to a higher one at the back, and the difference in tension seems enough to force it onto the big ring. Not a solution, but a workaround if it happens whilst out on a ride. Never had a lever jam though. Sounds bad!