Wheels Manufacturing Aluminum Chainring Spacers (Bag of 20) (3.8mm) - CS-3.8
Wheels Manufacturing Aluminum Chainring Spacers (Bag of 20) (3.8mm) - CS-3.8, Wheels Individual Chainring Spacer. Features: For chain and derailleur alignment Specs: Fits:middle Size:3.8mm Package:20/bag