SRAM XX1 & X01. Independently tested and winning
competitions for the least rolling resistance,
the truly best part of these jockey wheels is
the silent and crisp shifting they afford.
Machined from solid Delrin at our California
machine shop, not molded, they are much harder
and precise than any competitor's that have
copied this design. Where aluminum jockey wheels
are loud and deteriorate almost immediately
after installing, Enduro Bearings jockey wheels
will shift perfectly and precisely a year or two
from now just the same as the day you installed
them. There is no composition information for this item
There is no additional information for this item
There is no wash and care information for this item