Originally Posted by
Tandem Tom
Considering an early '80's Miyata 610 for my wife. I have a mid'80's with barend shifters. She is not to keen on barends so here is my question. I am thinking of maybe 105's STI's but wonder if they will work with the older crankset?
Thanks!
As mentioned, it depends on what generation of 105.
If you did 8 speed 105 or 600, the current crank could probably be fine. Ive used cranks which were originally on 6 and 7 speed bikes for 8 and 9 speed conversions without changing the chainrings. Shifts were/are fine.
If you want more recent 105, the chain will be thinner and may not play well with the thicker chain rings. You can always try before changing the rings. Ive read that the chain can 'skate' when shifting from large to small when using rings that are too thick for the chain.
New 105 may mean STIs, new cassette, new crank, new derailleurs, and new bottom bracket.