Most road double FD's, Shimano or otherwise, at least before the "sneaky" current road designs, shift triples fine. I'm unaware of their FD's otherwise being troublesome, unless with indexing. The CX-70 is a "normal" FD as far as I recall.
As for the FD hitting the arms, A photo or two from different perspectives would be helpful ! Plus the ring sizes. Details help. Even back in the day with narrow straight crank arms, a rather wide cage Campy double FD moved the chain without hitting the arms. FWIW, I used a 9sp 105 FD-5500 double FD with 26/44/48 rings on a TA Zephyr crank for years and it shifted great. The Silver crank is about the same tread width as the Zephyr was, as I think it was a Grant favorite back then. I then used that same double FD with a Sugino XD 24/36/46 crank. I tried a Tiagra 9sp double FD also and it worked as well. No worries, I'm sure it's something simple. On Friday, March 14, 2025 at 2:37:26 AM UTC-4 Matthew Williams wrote: > Hello all, I’m having a tough time finding the correct components for my > Appaloosa's drivetrain—specifically, the front derailleur doesn’t like the > Silver crankset. > > Here’s the existing setup: > > Shifters: Shimano friction, thumb > Cassette: Shimano XT 11-34 9-speed > RD: Shimano Deore RD-M591 > Chain: IRD 9-speed chain > BB: Shimano BB-UN55 (stock from RBW) > Crankset: Silver 3-ring (stock from RBW) > FD: Shimano CX-70 (yes, it’s a double, it came with the bike) > > The CX-70 barely functions on the Silver triple. I have tried several > Shimano triple 9-speed derailleurs, but their travel hits the Silver > crankset arm before they can move the chain to the outermost ring. > > I have heard Shimano doesn’t play well with other components, and I’m now > wondering if I need a crankset with wider arms so a 9-speed triple > derailleur has enough travel room to move the chain into position. > > How have other people solved this issue? What front derailleurs and > triple-ring 9-speed combinations are you using? What do you recommend? As > always, your wisdom, advice, and experience are appreciated. -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/rbw-owners-bunch/676dde44-d4a1-4d50-a95a-ed6b15b14a15n%40googlegroups.com.
