Bill L. brings up a good point at the end of his bikes' BB and crankset descriptions; the FD's shifter.
Many ills of FDs used outside manufacturer's recommended specs (T Max, Range) and capacities of integrated shifters are eliminated by manual levers, DT or bar ends. Makers don't want you to mix or deviate from installation specs for a number of reasons that fly in the face of BOBs doing BOB things to and on their bikes. I am using RH 46/30 cranks, 130mm rear hub with the 116mm SKF BB. With fenders over the 650B x 42 tires I had to dimple the lower DS end of the rear fender to avoid interference with the chain on the largest cog and inner chainring. I use a SunTour Superbe Pro (flat sides) FD with Shimano bar end shifters. I don't have overshifts or fail-to-shifts on this setup, no chain rub on the steep grind climbs either. This build was what I wanted, a result of my evolved experience and riding, not by any Shimano, SRAM or Campagnolo dictates. They don't have solutions for riders like us. Andy Cheatham Pittsburgh On Tuesday, December 3, 2024 at 9:05:26 PM UTC-5 [email protected] wrote: > Further context… I’ll be moving my drivetrain to a new 2024 “lugged > Roadini” when those frames ship. Instead of reusing my 113mm BB, I can go > with Riv’s default 110mm or I could source a 107mm and begin experimenting > first with that (and BB shims). I dunno. > > > On Tuesday, December 3, 2024 at 7:03:20 PM UTC-7 J-D Bamford wrote: > >> For a Rene Herse double crank (46-30) on a trad’ish randonneur (130mm >> rear spacing, 700x32mm tire clearance + fenders, straight chainstays not >> curved)… what actual BB spindle lengths have people had success with? I’m >> aware of the RH charts… one chart suggests 110mm and the other chart >> suggests 107mm - so I’m more curious about actual experience ‘from the >> field’. >> >> >> Origin of my inquiry… poor FD shifts (FSA/IRD “compact double”, I’ve >> tried them both)… either it throws my chain beyond the big ring and onto >> the crank arm… or I limit its travel and it won’t shift big at all. The >> narrow Q on the RH crank arm minimizes any experimentation with FD cage >> angle. And my cage sits just a mm or two above the big ring, akin to >> Shimano’s alignment sticker. So now I’m wondering if my 113mm spindle puts >> the FD cage too far out in its swing. I could easily fit a 110mm spindle, >> and probably 107mm based on eyeballing clearance to the chainstays. Maybe >> shorter spindles would improve FD throw/alignment? Thanks in advance for >> any thoughts on this wandering missive. >> > -- 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/f5b26787-6372-4350-be9d-a09eb7b6a40en%40googlegroups.com.
