X.P.S.S.™
Extreme Performance Shifting System
Special design of chain up and downshift zones - chainring pin profile optimization - allows for faster and more precise shifting in all conditions.
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CHORUS™ ULTRA-TORQUE™ ST 11s crankset
X.P.S.S.™ (eXtreme Performance Shifting System) is the acronym that denotes the most effective and efficient system ever, with the absolute best shifting speed and precision even under load.
The Chorus™ crankset with carbon fibre is the ideal partner for any competition.
Technologies
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X.P.S.S.™
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Ultra - Torque™
Pressure on the pedals is transmitted efficiently without any power loss.
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- Options
- Weight
- 170, 172.5,175 mm
39-52, 39-53- - 667 g
Technical Specifications
full-carbon unidirectional-multidirectional cranks - light alloy fixing bolts - light alloy chainrings with XPSS™ (eXtreme Performance Shifting System) - chainrings with hard anodization treatment - 8 pins on the large chainring - integrated ULTRA-TORQUE™ semi-axles - requires ULTRA-TORQUE™ BB cups
FEATURES & BENEFITS
- XPSS™: exclusive design of the eight upshift zones and two downshift zones of the chainring. The specific profile of the teeth and the zones dedicated to upward and downward chain movement enable fast and precise shifting in all conditions.
- ULTRA-TORQUE™ BOTTOM BRACKET: pressure on the pedals is transmitted efficiently without any loss of power.
- 8 CHAIN UP SHIFT AND 2 CHAIN DOWNSHIFT ZONES: Faster and more precise shifting, even under stress.
- EXCLUSIVE CRANK/CHAINRING MOUNTING SYSTEM: Reduced weight - easy maintenance.
* The nominal weight refers to the lighter specification among the available options. The weight of the hubs does not includes the quick-release.
The nominal weight does not take account of the sometimes considerable quantities of grease used in the assembly of the products.