Joined: Jan 2009
Posts: 44,338
Likes: 6,640
From: New York, NY, and High Falls, NY, USA
Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem
Another concern is rider position. Mountain bikes have the rider leaning forward pretty well, which might make it hard to apply adequate weight to the coaster brake. If so, be sure to have at least a front rim brake, and be sure to use it.