ROTOR 3D+ crankset 130/74mm 175mm Triple 3-speed 30mm axle black/red

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  • Your bike is more than just a tool for training; it's an accessory to your lifestyle. You've engineered your life to accommodate your riding, it seems reasonabe to expect the same of your bike components. The 3D+ 110 is a work of engineering founded upon the principles of lightweight and rigid. Crank arms CNC-machined in Spain from aeronautic-grade 7055 aluminum are combined with proprietary technologies to yield cranks with an exceptional stiffness to weight ratio that can handle the dizzying wattage that you'll stomp out on the 3D+. Together with ROTOR's Universal Bottom Bracket (UBB) system, the 3D+ compact crank offers a performance upgrade opportunity for almost all bikes on the market.

    • Spider: 5-arms
    • Lenght: 175mm
    • BCD: 130/74mm
    • Weight: 518g
    • Spindle: 30mm aluminum alloy
    • Q-Factor: 148 mm RD3 158,5mm
    • Chainline: 43.5mm RD3 45,5mm
    • Material: aluminum alloy 7055 100% CNC-machined
    • Bottom bracket: BB30
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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 adjustmentsinstruction manual
    517.09 KB
    Which bottom bracket do I need?instruction manual
    894.62 KB
    Which bottom bracket do I need?instruction manual
    894.62 KB
    Q-Ring adaption guide / Starting with Q-Ringsinstruction manual
    194.47 KB
    Q-Ring adaption guide / Starting with Q-Ringsinstruction manual
    108.76 KB
  • EAN/UPC
    Factory number:C02-060-21010-001
    EAN:8434366002590
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This item is crafted in Spain