Regarding Rene Herse bb spindle length, on mine a 111mm bb spindle length results in a 119mm clear space between the arms, though this could vary a bit on different bb's and RH cranks due to machining tolerances. To determine at a bb spindle length for an RH crank you could subtract 8mm from your chainstay spread (at crankarm distance) and then add back a healthy margin for square taper interface differences, crankarm clearance, and chainline adjustment. On my bike (not a Hilsen), the chainrings aren't a problem, as the crankarms would contact the chainstay well before the 42-24 rings.
One problem I did have when going to a short spindle is learning that some front derailleurs won't swing far enough inward to drop the chain onto the inner ring. A later-model Shimano 105 wouldn't work until I filed off the inner adjustment limit stop. An older Campy Chorus works fine unmodified. Jack - Seattle On Tuesday, May 4, 2021 at 4:11:10 PM UTC-7 KenP wrote: > Hi Doug, > My Appaloosa needed a much longer bottom bracket. > RH shipped me a 121 & LBS had me return the BB because it needed to be > even longer. The RH crank has a different feel because of the Q factor. > It puts the legs closer together. It weighs about the same. Advantages > that you customize it with the rings you want, a longer/shorter crank arm, > finish color, etc. The rings have a different bolt pattern than the XD2. I > switched front derailleur and I switched to a RH crank from XD2 and am > satisfied. I had been having trouble with the XD2 having the chain drop > between the rings. Riv's own new crank might be nice as well if they have > them available. > Ken > On Sunday, May 2, 2021 at 3:53:47 PM UTC-4 Doug Williams wrote: > >> I have a 58cm 650b A. Homer Hilsen that I purchased from Riv in 2014. I >> have been loving it ever since! It has the Sugino Triple Crank 46-36-24 and >> I run it all friction shifting with bar end silvers, 8 speed with a 11-32 >> cassette. The front derailer is Shimano Claris Triple. The bottom bracket >> is bbc110. >> >> So...I'm getting older and I notice I don't use the 46 ring much, at >> least not with the higher gears in the back. I am definitely an "UnRacer" >> anyway. I am thinking of getting the Rene Herse double cranks with 42-26 >> rings. If I go with the 8 speed megarange 11-34 cassette in the back, I >> would give up almost nothing in the lower gears and lose just some high >> gears that I rarely use anyway. So two questions: >> >> 1. Is my bottom bracket compatible with the Rene Herse cranks? I think >> so, but I'm not sure. Would now be a good time to replace it anyway? >> >> 2. Should I just keep my Claris triple FD and crank in the limit screw or >> go with something like the Shimano CX70 or some other double FD that works >> well with compact 42-26 rings? >> >> Any other comments or suggestions would be welcome. >> >> Doug >> > -- 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 rbw-owners-bunch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/b339496c-9cd4-4430-8261-c1697f20aaabn%40googlegroups.com.
