Effects of Chain Break-In on Efficiency Test

We examined 3 brand new, high-end, 10sp chains to determine how an 8-hour break-in affected the average efficiency. How much improvement in efficiency can be gained? Download the report to find out why you don't want to race on a brand new chain.

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Chains tested-

Campagnolo Ultra Narrow Record 10

Shimano CN-7901 (Dura Ace)

SRAM PC-1091R (Red)

Run time= 8 hours @ 250 watts load

Factory Lube