Replacement Bearing for ADA Spring-Loaded Chain Tensioner for GSR40 $6.99 Quantity discounts available QuantityPrice Quantity: -+ SKU: GG507C ABOUT THIS PRODUCT:Replacement Bearing for ADA Spring-Loaded Chain Tensioner for GSR40AboutAboutReplacement Bearing for ADA Spring-Loaded Chain Tensioner for GSR40 (part gg505). Bearing is a R4A-ZZ.