Please welcome SLF Motion's new V2 Oversize Hyper Speed System. Building upon what we learned over the past 18-months using/testing/selling our Version1.0 Hyper Speed System, we have designed our new V2 system to be stronger, lighter, stiffer, to have more adjustability, and improved shifting. This new V2 system now utilizes 100% USA made carbon fiber cages, offers multiple spring tension settings, is ~15% lighter (model dependent), uses redesigned 7075 Aluminum 14-Tooth and 18-Tooth wheels for better chain engagement and easier setup, improved bearing design, and now offered in multiple anodized wheel color options. Model 679 Hyper Speed Systems are compatible with cassette's up to 28T - Model 891 Hyper Speed Systems are compatible with cassette's up to 34T.
Shimano Oversize 14/18 Hyper Speed System - Available in both Model 679 (Ultegra 6700/6800 and Dura Ace 7900/9000 - 10 & 11sp as well as ) and Model 891 (Ultegra 8000/8050 and Dura Ace 9100/9150).