power vs weight vs triple / compact

[deptfordmarmoset]

Maybe even doubles will be a thing of the past soon http://roadcyclinguk.com/gear/sram-...tm_source=newsletter_rcuk#4GTrRjzlwGfz4bGj.97

Ok, so you lose the weight of an additional ring, front dérailleur and cabling. In exchange, if you want a comparable gear range you'll have to have a monster cassette and put up with big steps between gears. Also, assuming the single ring sits more or less where the middle ring on a triple is, your chain line in the fastest and slowest gears is not straight. I would have thought that, if there were any gear where you'd like the straightest chain line with the lowest possible loss of power, you'd want that to be smallest cassette ring and front ring to be well aligned. But if the front ring sits more in line with that cassette ring, the lowest gears will have some fairly extreme cross chaining.

 

[Trull]

…mind you all the really cool kids are using Rohloff for its impervious design and sweet gear changes even when still. Coupled with a (gasp) belt drive you have a rock solid drivechain which will last and last.