An LBS charged me $16 for one eyelet's worth. I installed the new system in the lower eyelet after servicing my shock recently. I couldn't tell any difference when riding my Blur LT2. A mechanic also told me that in his experience they didn't last longer either. We'll see.
Mtbr's 2016 Winter Biking GearReviews and Roundups
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Thread: New Fox reducers+bushing