1991 trek 930 single track mountain bike here i have a complete rebuild of a trek singletrack 930 as a commuter/everyday bike. Thanks???? The 1991 Trek 930 Retro Singletrack Mountain Bike is a sleek and vintage-looking bike featuring a 19-inch steel frame in a classic black colour. This bicycle is perfect for men who enjoy tackling rugged terrain and conquering challenging trails. With 26-inch wheels, V-brake front suspension, and adjustable seat, this Trek bike offers a smooth and comfortable ride.