Bicycle Components & Accessories

GPDNBIEU, Indoor Bicycle Trainer,Bike Rollers Foldable, Indoor Cycling Bicycle Roller Trainer(Red) SMOOTH QUITE: Matrix bridge structure makes the force even, which can reduce the impact during riding; Aluminum alloy roller lower abnormal noise between 60-75 dB. (The sound of Mountain bike will be louder than road bike because of different tires)... GPDNBIEU, Indoor Bicycle Trainer,Bike Rollers Foldable, Indoor Cycling Bicycle Roller Trainer(Red)