ROTOR RHawk MTB crank arms set noir

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  • R-HAWK

    The R-Hawk checks all the standard boxes for an all-mountain/enduro crank. Like ROTOR’s REX cranks, the R-Hawk is a work of engineering built on the principles of lightweight and rigid, but R-Hawk’s modular concept offers compatibility that meets – and even exceeds – current trends in mountain bike technology. Crank arms will be available independent of an axle and chainrings; there’s no longer a factory-assembled arm+axle, both crank arms can be removed from the axle. This way the R-Hawk can be mounted to standard, boost, and downhill axles.
    Rubber bumpers protect crank arms against wear, and can be customized with a choice of seven colors: black, blue, green, yellow, red, pink, or orange.

    Direct Mount chainrings for the R-Hawk feature ROTOR’s patented Optimum Chainring Position (OCP) system to optimize your pedal stroke. Swapping out chainrings on the fly becomes incredibly easy with just an 8mm allen key.

    Chainrings also feature a proprietary spline.

    • Weight: 665g (175mm)
    • Sizes: 165/170/175mm


    Characteristics:
    • Spindle: 30mm
    • Q-Factor: 164mm standard (Link to standard axle) / 170mm boost (Link to Boost axle) / 179mm DH (Link to DH axle)
    • Chainline: 49,5mm / 52,5mm boost
    • 1x Compatible
    • Material: aluminum alloy 7055 100% CNC-machined
    • Compatibility: BBRight / BB30 / PressFit30 / BSA 68mm, 73mm and 83mm
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    • Why Q-rings?
    Biomechanical studies indicate that the effort made with Q-Rings becomes a greater performance and pedaling feeling more rounded and smooth due to their ability to make a better use of the strongest muscle groups while they also compensate the dead spot in pedaling.
    Q-Ring-Round Ring Comparison
    Far from feeling unusual, a Q-Ring feels much rounder than a round ring. A spinscan analysis visualize a cyclists power delivery, with a bar graph indicating the variation from maximum to minimum output and a polar graph showing the rotating shape of the power profile.

    By comparing the left hand Round chainring spinscan and the right hand Q-Ring spinscan below, one can see that Q-Ring graphs are clearly smoother (less variation in torque in the bar graph) and fuller (less of a peanut shape at the weakest point).
    Spinscan
    When one projects a polar plot of a typical spinscan over the varying drivetrain resistance of a 53t Q-Ring during its rotation, the value of a Q-Ring is clearly visible: Maximum power is met with a “56,5t” Time trial sized chainring diameter and minimum power is met with a “50,4” compact size chainring diameter.
    This variation creates the “perfect spin” we all aspire to, that simply isn’t possible with round chainrings. This is because Q-Rings compensate for the weakest zone of the pedalling stroke and maximize use of the most powerful zone.
    Key benefits (based on ROTOR study)
    • All Q-ring TT’s were faster, with an average gain of 1.6 sec and 0.7 km/h (1.8%).
    • All Q-Ring TT’s generated more power, with average increase of 26.7 W (6.2%)
    • Reduced oxygen consumption and heart rate in submaximal tests
    • An immediate performance increase on switching from round rings to Q-Rings
    • An immediate performance reduction on switching back to round chainrings
    • It also appears that the more effort a cyclist exerts, the greater the benefit of Q’s

    Please see this article for more detailed information.
  • Attachements
    Front derailleur adjustmentsMode d'emploi
    		517.09 KB
    Which bottom bracket do I need?Mode d'emploi
    		894.62 KB
    Which bottom bracket do I need?Mode d'emploi
    		894.62 KB
    Q-Ring adaption guide / Starting with Q-RingsMode d'emploi
    		194.47 KB
    Q-Ring adaption guide / Starting with Q-RingsMode d'emploi
    		108.76 KB
    Installation GuideMode d'emploi
    		1.14 MB
    Compatibility guideAppendice
    		1,013.43 KB
    Technical Drawing RHAWK / RRAPTOR StandardAppendice
    		210.99 KB
    Technical Drawing RHAWK / RRAPTOR DHAppendice
    		210.05 KB
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Ce produit est manufacturé à la main en Espagne