yes, you are right, with a long enough cage and careful selection of chain length, you MAY be able to get the chain to wrap the large / large or small / small combination on a triple, but why ? Both are at the extremes of chain tension and slack, and also friction and wear associated with cross-chaining are at a maximum, but more importantly, the gear ratios of both combinations can be approximated by less extreme selections of ring and cog.

I have only one bike with long derailleur cage, it can easily shift the large large, but I never ever use that combination, or the small small either. Sort of a department store bike anyway as you can see :- )




Mark Petry
Bainbridge Island, WA USA