Prestacycle UniBlock PRO Cassette | 12-Speed for Campagnolo 9-12 Freehub

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Prestacycle UniBlock PRO Cassette | 12-Speed for Campagnolo 9-12 Freehub



  • SHIFTING: Campagnolo, Shimano & SRAM
  • FREEHUB: Campagnolo 9-12 speed only


  • Maximum Performance 12 Speed Shifting
  • Interchangeable Drivetrain performance
  • Ultra-Strong ChroMoly 3D Structure
  • Ultra-Light – less material needed
  • Larger, better-distributed Freehub engagement
  • Easier to Clean
  • Red alloy locknut included
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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.  This allows Prestacycle to remove more unnecessary material, making our cassettes lighter than even top Manufacturer models that use fast-wearing aluminum big cogs.

Better Engagement, Smoother Operation

Single block design insures the freehub has MORE 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!

New Advanced Shifting Technology

Prestacycle now introduces UniBlock Pro.  Our new Professional cassettes create a new generation of compatibility and enhanced shifting performance.  UniBlock Pro 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 specific benefits in one system or another.  By examining the demands and benefits to each particular drivetrain, we’ve been able to combine all the different benefits of all drivetrains using one new design.  Where one OEM drivetrain has one benefit over another, our new design facilitates the fastest, smoothest possible shifting to all systems while minimizing the impact to power delivery.

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 provide the highest possible speed and reliability in shifting.  Even shifting under load is maximized.

Cross-compatibility of shifting systems*

Since the advent of 11 Speed, all major shifting systems have had nearly identical cog spacing. At it’s core, this has proven itself to better support racing and professional service.  The days of a rider not being able to take a replacement wheel from Neutral support because they had a different drivetrain are long over**.

On UniBlock Pro, our new tooth profiles not only provide maximization of shifting technologies, but also are profiled to insure all micro-variations in cog spacing are encompassed by tooth thickness.  Stronger ChroMoly steel allows us to vary tooth thickness to provide gap compliance while maintaining strength so that each cog spacing exactly matches all three major drivetrain profiles.  Our same Cassettes enable the best possible shifting and running performance on any drivetrain.

Use one freehub on another system.  Our complete cross-compliance allows you to use any freehub with any drivetrain*.  You no longer need to find freehubs for your wheels to match your drivetrain.  Use an HG freehub wheelset on Campagnolo with UniBlock Plus and see the same improved shifting we offer on Campagnolo freehub versions.  Use a top-end Campagnolo wheelset with Campagnolo freehub on an HG based drivetrain.  Any system benefits from maximum performance.

UniBlock Pro Design enhancements also allow adapting newer standards to old, such as adding 11 & 12 speed to Shimano 10 speed wheels (with our optional lockring), or adding a shifting system to a wheelset or direct drive trainer that does not otherwise support that drivetrain.

HG12 Profile – fewer teeth, greater engagement

Prestacycle UniBlock Pro’s Unique HG12 interface is compatible with all HG12, HG11 and HG10 Freehubs.  Wider inner and outer freehub teeth maintain engagement at all points in all gears and create an overall increase in freehub contact, despite having fewer teeth.  This provides the added benefit of reduced noise and weight.

*Installation notes

  • While Tooth gaps and shifting profiles are optimized for all systems, re-adjustment may be necessary.  Various brands of freehubs can cause small variations in cassette positioning.
  • Not all derailleurs are compatible with all gear ranges.  Please verify if your derailleur is compatible with the largest tooth size you are ordering.  Electronic shifting systems are the most picky about working with gear ranges not offered by the Original Manufacturer.
  • DI2 installation instructions may suggest “one full turn” of the limit screws past the limit.  We have found this negatively affects the shifting of any brand cassette as it controls the range for each shift.  We highly recommend setting the limits screws to offer no-more-than regular free operation of the min/max gears.

** 11 and 12 speed only.  10 speed shifting systems do not have compatible spacing between shifting system brands.  Prestacycle cross-compatibility does NOT apply to 10 speed cassettes.

Additional information

Weight 1 lbs
Dimensions 5 × 5 × 3 in

11-25T, 11-29T, 11-32T, 11-34T



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