T-Bob Posted June 20, 2013 Share Friction Facts: Bigger pulleys really are more efficient Among the pulleys tested were 13-tooth Shimano Dura-Ace 7700 (left), Berner's 13/15-tooth set (middle), and a pair of 15-tooth ones from RALTech (right). Small power-saving differences detected between rear derailleur pulley wheels This article originally published on BikeRadar Pro road racers who use Berner's uniquely oversized rear derailleur cages have sworn time and again that they reduce drivetrain friction thanks to their humongous 15-tooth pulleys. Now, Jason Smith of Boulder-based lab Friction Facts has confirmed that claim with his own independent testing. Berner-equipped racers such as Fabian Cancellara, Edvald Boasson Hagen, Philippe Gilbert and others will be relieved to know that the advantage is genuinely there – but it's also pretty small at just 1.76 watts compared to a standard Shimano Dura-Ace setup. Via cycling news http://www.cyclingnews.com/features/friction-facts-bigger-pulleys-really-are-more-efficient nathrix 1 Link to comment Share on other sites More sharing options...
Guest EdEdEd Posted June 19, 2014 Share Friction Facts: Bigger pulleys really are more efficient Among the pulleys tested were 13-tooth Shimano Dura-Ace 7700 (left), Berner's 13/15-tooth set (middle), and a pair of 15-tooth ones from RALTech (right). Small power-saving differences detected between rear derailleur pulley wheels This article originally published on BikeRadar Pro road racers who use Berner's uniquely oversized rear derailleur cages have sworn time and again that they reduce drivetrain friction thanks to their humongous 15-tooth pulleys. Now, Jason Smith of Boulder-based lab Friction Facts has confirmed that claim with his own independent testing. Berner-equipped racers such as Fabian Cancellara, Edvald Boasson Hagen, Philippe Gilbert and others will be relieved to know that the advantage is genuinely there – but it's also pretty small at just 1.76 watts compared to a standard Shimano Dura-Ace setup. Via cycling news http://www.cyclingne...-more-efficient You need a bump? Link to comment Share on other sites More sharing options...
Jakkals. Posted June 19, 2014 Share Just ask Ryder Hesjedal, He rides them beeeeg Link to comment Share on other sites More sharing options...
T-Bob Posted June 19, 2014 Share You need a bump? Cheers for the bump, I'd forgot about that bit of 'tech'... Wonder where I can get those big 15 toothers. Link to comment Share on other sites More sharing options...
Captain Fastbastard Mayhem Posted June 19, 2014 Share Cheers for the bump, I'd forgot about that bit of 'tech'... Wonder where I can get those big 15 toothers.I hear they grow them 15 toothers in Tazzie, mate. T-Bob 1 Link to comment Share on other sites More sharing options...
Guest EdEdEd Posted June 19, 2014 Share I hear they grow them 15 toothers in Tazzie, mate.Tell me about the SPACESHIP!!! ? Link to comment Share on other sites More sharing options...
T-Bob Posted June 19, 2014 Share I hear they grow them 15 toothers in Tazzie, mate. Feck, I've honestly just stopped laughing... Captain Fastbastard Mayhem 1 Link to comment Share on other sites More sharing options...
Captain Fastbastard Mayhem Posted June 19, 2014 Share Feck, I've honestly just stopped laughing...Thought you'd like that.... Link to comment Share on other sites More sharing options...
Captain Fastbastard Mayhem Posted June 19, 2014 Share Tell me about the SPACESHIP!!! ?SPACESHIP!!!! Vangar 1 Link to comment Share on other sites More sharing options...
Brett Posted June 19, 2014 Share Heard that plastic wheels are more efficient than sealed bearing aluminum wheels, like that of kcnc. Anyone know the truth in this? Link to comment Share on other sites More sharing options...
Guest EdEdEd Posted June 19, 2014 Share SPACESHIP!!!! Now what what!? Link to comment Share on other sites More sharing options...
Captain Fastbastard Mayhem Posted June 19, 2014 Share Now what what!?watch the Lego Movie and you'll understand Link to comment Share on other sites More sharing options...
Guest EdEdEd Posted June 19, 2014 Share watch the Lego Movie and you'll understand Ooh... Still need to do that! Link to comment Share on other sites More sharing options...
milky4130 Posted June 19, 2014 Share 1.76watts is a lot & free (well not exactly free but you'll have the advantage) if I had the means I'll do it too. Edited June 20, 2014 by milky4130 Link to comment Share on other sites More sharing options...
milky4130 Posted June 19, 2014 Share It's like the Right chain & lube I read somewhere also on bike radar some time ago will also give you "free watts" by reducing friction. Link to comment Share on other sites More sharing options...
Headshot Posted June 20, 2014 Share Is this a roadie thread? Link to comment Share on other sites More sharing options...
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