Originally Posted by
deathshadow60
More contact area == more traction. That simple. If you're gonna go coaster brake as a larger adult, don't put it on flimsy thin sub 2" width tires; No doubt it's 26x2.125 "For the Win". Well, that an my fat ass usually bends the rims on anything smaller
A coaster brake doesn't give any less traction for a given contact patch than any other rear brake.
That being said, its always safer to have brakes on both wheels.