Commuter Bike Derailleur gears, part-chainguard, 700C wheels with fairly light 1.125-inch wide tyres, calliper Vor cantilever brakes, mudguards, carrier rack, and possibly, built-in lights. The slant here is towards the performance of a fast road sports bike, and a primary use for regular journeys of some distance, say 7 to 8 miles or more. A good model should be 26 lb or less. See also the