Wednesday, June 26, 2013

Are Oversized Pulley more efficient?

Oversized Pulley, cycling, bike parts,

Professional road racers use Berner's uniquely oversized rear derailleur cages because they say that it reduce drivetrain friction because of its huge 15-tooth pulleys. Jason Smith of confirmed that it does reduce friction through an independent testing. However, the advantage is pretty small at just 1.76 watts compared to a standard Shimano Dura-Ace setup.

You can download Jason Smith's detailed report for free:

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