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From Steve Potts, super concise, that's Steve
1 . Classic Road, caliper brake ( 47 mm reach) 700 x 25 mm max tire size ( 28 mm on some calipers )
2. Gravel, Disc or larger rim brake, 700 x 45mm max tire size, generally smaller front chain rings and new 1 x 11 drive trains.
3. Classic Mountain Bike, 26" 27.5 " and 29" , 2.35" max tire size.
4. Plus Mountain Bike, 26" , 27.5 " and 29" . 3" max tire size.
5. Mountain Snow, anything goes.....
Of course there are some geometry concerns with each design,,,,, back to work.
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