Overview Reviews Product Description ProTaper 033223 Race Spec Aluminum Rear Sprocket 51T Blue 520 Size ProTaper 033223 Product Videos Custom Field Product Reviews Write a Review Write a Review × ProTaper ProTaper 033223 Race Spec Aluminum Rear Sprocket 51T Blue 520 Size Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *