One piece machined from chromoly cassette. This is the only 12 speed cassette on the market that includes an 18T cog. Lighter than super record. Weighs only 163 grams! Please note that the 11-29T version is pictured. (I will take pics of the actual 11-25T version in the coming days). FREEHUB: Campagnolo 9-12 speed. Ratios: 11-12-13-14-15-16-17-18-19-21-23-25 Weight: 163 grams. Prestacycle UniBlock Pro Cassettes. Prestacycle UniBlock Pro Cassettes are a single-piece unit machined from a solid block of cold-forged Chrome Molybdenum alloy steel, then heat-treated, tumble-finished and electroplated for added durability and low-friction operation. ChroMoly alloyed steel is significantly stronger than materials used in other Cassettes including top-end OEM Cassettes and will last longer. The single block design offers 3D structure to optimize strength and distribute forces. Greater Freehub Engagement, Smoother Operation. Single block design insures the freehub has. Engagement no matter what gear your are in. Single cogs from other Cassettes can cut-like-a-knife into freehubs. By increasing and distributing engagement across the entire freehub in any gear, we are reducing torsional loads thus reducing freehub wear and insuring lowest rolling resistance within the freehub. This also makes our Cassettes the safest to use with high-end alloy freehubs. Without any spacers in UniBlock, there is nothing to loose, and nothing you can install incorrectly. Faster cleaning on and off the bike, with quicker, mistake-free installation insures you are ready-to-go! Prestacycle introduces UniBlock Pro cassettes with ARCT Shifting tooth profiles. UniBlock Pro ARCT is our own unique, all-new shifting profile that provides shifting characteristics equaling or improving upon shifting performance for every major brand. We’ve performed extensive analysis of all major shifting systems. Our results show that due to how narrow chains have become, chains offer only small differences that contribute to shifting performance. Meanwhile, a great deal of varying technologies exist in cassette tooth profiles from major drivetrain manufacturers creating different specific benefits in one system or another. By examining the demands and benefits required by each particular drivetrain, we’ve been able to create a new system with the benefits of all drivetrains using one new design, creating all advantages to all systems. Going deeper, we’ve optimized every single tooth pairing on every cassette. A shifting profile from a 16T-to-17T cog is different from a 15T-to-17T cog on a different cassette. These exact-match pairings for both up-and-down shifts provide the highest possible speed and reliability in shifting. Even shifting under load is maximized. Our new Professional cassettes create a new generation of compatibility and enhanced shifting performance. Campagnolo 9-12 Freehub Profile. Prestacycle UniBlock Pro’s splines are compatible with all Campagnolo 9-12 speed freehubs, as well as N3W adapter kit. Wider inner and outer freehub teeth maintain engagement at all points in all gears and create an overall increase in freehub contact, no matter what gear you are in. Not all derailleurs are compatible with all gear ranges. Please verify if your. Is compatible with the largest tooth size, and cog gaps that you are ordering.
