The seattube on steel frames is 1-1/8" (28.6mm) external diameter. If the builder uses 0.7mm wall thickness for the seattube, that gives 27.2mm internal diameter; 0.9mm gives 26.8mm.
I found that the 26.8mm seatpost supplied with my Appaloosa was a slightly loose fit in the seattube, and as I already had a nice Suntour Superbe Pro post in 27.0, I reamed the seattube slightly to take that seatpost. Nick David Person 25 Nov to RBW Owners Bunch I sure wish Riv hadn't changed the seat post diameter from 27.2mm to 26.8mm on their frames. Doing so really limits the available seat post options. One particular suspension seat post I use is only available in 27.2mm. Baffles me why Riv chose to do that. Glad I got my Hillborne before the change, but rules out an Appaloosa as my next bike. -- 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 on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/51f6cc64-5473-4dc7-adc1-7e48e9f2b85dn%40googlegroups.com.
