A Quality Chain Roller Kit from All Balls Racing. Hi-performance rollers
for replacement of OE chain rollers. The universal 34mm and 38mm
Polyurethane chain rollers have a 98A Durometer hardness for long life and
feature sealed precision bearings with two additional outer seals to
prevent water and dirt from contaminating the bearings. They are the
longest lasting chain roller in the industry. The OE replacement chain
rollers that mount directly to a frame boss are made from hi-performance
self lubricating nylon.