If you’re still rockin’ a Shimano Dura-Ace 11-speed group, you’re in luck. Not only does Muc-Off say those 11-speed chains are 36.6% faster than the new 12-speed chains, but their new oversized derailleur pulleys make them even faster.
Formerly available only for their pro teams (EF Education Easypost, INEOS Grenadiers, and Elite IRONMAN triathletes Laura Philipp and Kat Matthews), they’ve made a limited batch of the L.O.P.S. 2.0 (Lightweight Oversized Precision Shifting) upgrades available for purchase. More than just reducing friction with a ceramic bearing upgrade, Muc-Off tweaked the angles to reduce articulation and friction, further optimizing the chain’s path. It’s designed, developed and built in the UK specifically for the Dura-Ace RD9100 and 9150 Di2 rear derailleurs. The 13-tooth upper and 19-tooth lower pulleys are machined from aerospace-grade aluminum, then coated with a friction-reducing finish that they say has 88% less friction than standard alloy and 71% less than hard-anodized metal.
The frame is a mix of carbon fiber with additive 6/4 titanium, making it both light and a claimed 62% stiffer than the stock Shimano cage.
Their own in-house testing, which uses a complete drivetrain for the most realistic results, used multiple cassette ratios. Results showed the L.O.P.S. 2.0 system having the lowest drag of other popular brands’ oversized derailleur pulley systems.
Weight is 79.4g, and retail is £999.99 while they last. Available direct from Muc-Off.