Originally Posted by
bradtx
DaveSSS, I agree that a small-small
usage shouldn't be used, but having a cross chaining princess daughter (nuff said there.
) the amount of RD wrapability needs testing, which I took for granted, but shouldn't have, as more damage can be done if the big-big is selected and the chain is too short than if the chain is too long and there's tension/guide wheel interferance.
Brad
I agree that the chain must be long enough to use the Big-Big combination without excess tension since this will damage and disable the drivetrain. If the range of the gears is larger than the real chain-wrap capacity of the RD (once the safety factor is removed), than allow slack as needed. A slack chain on the small-small combination will not cause damage and the only issue is a small risk of chain drop.
Michael