QUALITY MATERIAL: This bike rear guide wheel adopt quality aluminum alloy which is to use.
CERAMIC MATERIAL: Ceramic material can reduce drag force which can improve cycling efficiency.
FASTER SPEED: Positive and negative tooth guide wheel, no strange voice and faster speed.
APPLICATION: Stronger compatibility with flexible rotation. Suitable for use 4 / 5 / 6 mm guide wheel screws.
GUARANTEE: If you are not satisfied with our product you received, you can send emails to us at any time. We will reply you instantly and help you solve your problem.