Join Date: Jul 2011
Bikes: Santa Cruz Blur TR, Cannondale Quick CX dropbar conversion & others
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I ride my MTB on the road sometimes and it works fine, but I coast down hills sooner (as in, at a lower speed) than I would on a road or cyclocross bike because it runs out of gear.
It's a 28/39 2x10 using a 11-36 cassette. (the odd chainrings are because the rear derailleur won't work with the stock 26T small chainring and the 11-36 cassette.) 39x11 is a lot of gear when you get down to it, and you can go >20 mph on flat ground. but like I said, you can't expect to pedal >30 down a hill. just coast and enjoy the ride.
On the trail, I can stay in the big ring and use the whole cassette in most areas. Only in really hilly areas (yep, Kansas has a few, near OK and MO mostly) do I even need to shift to my small ring. I wouldn't use a 1x10 though.