Hi Friends --
I recently got a Trek T200, and I'm updating the drivetrain. Happily, it's 145 OLD at the back, so I am able to easily go to 9 speed. I've added Ultegra 9 speed STI brifters, a SRAM 9 speed cassette, and new chains. The rear shifts great with the XT derailer. However, the front is a little slow both from the inner 30T to the middle 42T, and also from the 42T back to the 30T. I have tweaked the cage on the stock 8 speed 105 front derailer to narrow it for the 9 speed chain, which helped. But I think having a ramped, pinned, and gated 42T would help a lot -- the stock chainring does not have ramps and pins. Problem is, the cranks are the Sugino XD tandem cranks, which are 110 BCD. Where can I obtain a ramped and pinned 42T in 110 BCD for a reasonable cost?