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Shop for Pulley Wheels Derailleurs & Parts at Nashbar. Various colour options, hardly available anywhere else on the market will make your bike even more uniqueFor correct installation and cage usage, please refer to the information presented below: after the cage is installed, remember to setup the position of the cage correctly in order to ensure the optimal drivetrain performanceWith Garbaruk RD cage for 11-speed SRAM rear derailleurs, you can squeeze much more performance out of your standard 11-speed rear mech thanks to the more efficiently positioned rear derailleur cage. Many assume it’s the well-marketed ceramic pulley wheel bearings (fitted with light contact seals and fast lubricant) that provide the claimed 2-4W savings, and while they play a role, the real benefits are in the oversized pulley wheels.Due to its obvious presence, pro teams with drivetrain sponsorship agreements aren’t allowed to ride a product like the OSPW.Pictured is a version specific to SRAM Mechanical. SRAM X.7/X.9 Derailleur Pulley Kit Pair 4.7 out of 5 stars 102. All models were tested as a set of two pulleys (typically one upper, and one lower pulley). 3. I ended up settling on the highest (and highest-friction) spring tension, simply because the chain slap was otherwise too great on my poorly surfaced local roads. A new Shimano Ultegra groupset is said to cost approximately 20W when pedalled at 250W (90rpm)* — in other words, your rear tyre receives 92% of what you put into the pedals. On Campagnolo derailleurs , the adjustment is done via a screw near the p-knuckle. sport camera; technologies. Many can indeed make you faster, while others perhaps exist because there is profit to be had.From exclusive content to premium benefits, join us and experience all we have to offer. Manufacturing equipment, design, and compatibility should be considered, too.”And right there is likely the reason for why we don’t see more drivetrain modifications in professional cycling: sponsorship conflict. Step into other disciplines where lucrative drivetrain contracts are rarer, such as Ironman, and OSPWs and similar modifications are a common sight.One argument I’ve seen is that the watts an OSPW would save over an already optimised drivetrain are negated by increased aero drag, and not surprisingly, that argument is disputed by CeramicSpeed. On Shimano and SRAM derailleurs, the b-tension adjuster fine-tunes the height of the guide pulley. And if it’s so good, why don’t we see more pros racing with it? select product lineup. So, if you're running a Shimano Dura-Ace rear derailleur, and fate has dealt your pulleys a vengeful, destructive hand, your only hope of salvation is the Dura-Ace Pulley Assembly Pair for the Rear Derailleur. It should provide better efficiency gains than a bottom bracket or hub bearing upgrade, and those benefits only amplify the harder you pedal and the dirtier your chain becomes.The Dura-Ace R9150 Di2 derailleur fitted with its OSPW weighed 230g, approximately 30g heavier than a stock derailleur, but like the SRAM version, the fitting of the OSPW grows the lowest gear allowance to 32T (30T stock).So we can keep doing this to the best of our ability, please join our mission by becoming a member.If the data is there, then why do all three major components manufacturers stick to small pulleys?You’ll find very few items in cycling that cost this much and still look this simple.So exactly how many watts will an OSPW save you? I was told the team would choose to use the system if it didn’t directly conflict with a far more valuable drivetrain sponsorship agreement.I reached out to Shimano’s R&D department for insight into the matter and simply got a “no comment”.Given that you can find an entire Dura-Ace Di2 rear derailleur (or an entire Shimano Tiagra groupset!) The metal pulley wheels should wear more slowly than resin versions, more because their larger size spreads the load further, rather than because of the materials used. I’m not going to beat around the bush: this product is overpriced for what you get.The data suggest the OSPW will indeed save you watts, although that speed is anything but free. Once installed, you’ll need to remove the cage in order to change it.Still, if you’re in the pursuit of marginal gains and spending $500 to save a couple of watts seems like the next step, then the OSPW is exactly for you. rokko. Stylrtop 2 pcs 11T Aluminum Sealed Bearing Jockey Wheel Rear Derailleur Pulley for Shimano Sram Rear Derailleur Etc. ... > road > category > rear derailleur pulleys. unzen. 1-800-727-2453; Live Chat; ... Shop for Pulley Wheels Derailleurs & Parts at Performance Bicycle Shimano Pulley Wheels Derailleurs & Parts. It could be because drivetrain efficiency is not considered by the ‘Big Three’ as a mass-market requirement yet. drivetrain. It’s simply applied through the ports on the backside of the cage. Well, that depends on the conditions you ride in.The large aluminium pulley wheels are noisier than small plastic pulleys, but not so noisy to be a nuisance over the whirr of your tyres or the hum of nearby traffic.