Originally Posted by
Dean V
Your chainline will probably be a bit narrower than it should be for a 145mm wheel. Having the timing belt out wide does increase its bending moment on the bike though it probably doesn't matter. The Paketa system of having it on the inside seems better to me. Looks tidier as well. Maybe Calfee could modify your chainstay to allow this while they are mucking around with the frame?
Already asked Calfee, and it would be a big thing to modify the spacing.
Not going to get into discussing Paketa RSD, other than to say I have a list of issues with that design. Beyond scope of this thread.
Based on our projected gearing (48/30 and 11-28 majority of the time) we will be running the "big ring" 48t at least 90% of our riding with a great chainline in that gear. It would be like running the middle ring, but a bigger version
Actually, tandem blasphemy that it is, we will probably just keep using a 12-27 SRAM 1070 cassette. For the .1% of the time we ever use a top gear, we certainly do not "need" the 11t. We are pretty fast up & down hills, but do not care to push high gears and do not race it. For bigger, steeper hills, likely use a custom 12-34t made up of combining the SRAM and a XT cassette we already have.
Agree the granny chainline will be a bit more to the inside (obviously), I believe it is still within spec/limits. I've tested the Di2 setup and it runs ok.
It seems this use of a
standard triple crankset has an advantage of being one of the narrower Q-factor setups achievable on a tandem using OOTB components.