Over ten years the range expanded beyond commuter bikes to include road, mountain, cyclo-cross, gravel, kids and fat bikes. Get a great deal with this online auction for a mountain bike presented by Property Room on behalf of a law enforcement or public agency client. The Datum comes with 32c tyres, which is a bit… Continue reading 29″ Genesis GS29 Mountain Bike 800 mile performance review by Marvin McKenzie Fitness After Fifty