ROTOR 3D+ MAS Triathlon Aero

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  • As the lightest crank in the road line, the redesigned 3D+ takes advantage of new 7055 alloy and a redesigned structure based on TDS technology to reduce weight while keeping a high stiffness.
    It’s 30mm axle with UBB30 technology makes 3D+ compatible with almost all bicycle frame standards available.

    The 100% aluminium construction of the 3D+ forgoes the use of trendy materials and stays true to its goal of delivering unrivalled performance at its weight level. By doing so it offers aluminium stiffness at a lower weight than most high end carbon cranks! With the use of our Trinity Drilling System to hollow out the crank arms and the application of our super stiff and ultra-compatible UBB30 axle, it offers a new level of performance for quality bike builds of any brand, era and type.


    Micro Adjust Spider
    The new Micro Adjust Spider (MAS), offers more positions to suit every rider’s needs. Our new advanced MAS spider has an alternative bolt hole placement allowing for intermediate positions between existing OCP (Optimum Chainring Position) of the Q-Ring. A standard crank in combination with the OCP of the Q-Rings, allows approximately 5 degrees of adjustment.
    The MAS spider when used with Q-Rings offers half positions giving approximately 2,5 degrees. This means that you can micro adjust the position of your Q rings, to suit your riding style.


    Features & Information
    130 BCD
    • 485 g for 170 mm / 497g for 175 mm
    • 170, 172, 175mm
    • 100% mecanizado CNC, Al 7075 T6
    • Q-Factor 148 mm, Chain line 43,5 mm
    • Ultra stiff 30mm Aluminum UBB axle
    • Compatible with BSA, ITA, BB86, BB30, BB30 PF, BBRight and BB386 Evo frames
    110 BCD
    • 485 g for 170 mm / 497g for 175 mm
    • 170, 172, 175mm
    • 100% CNC, extruded, T6 7075 crank arms with trinity drilling. Black polished crank with laser graphics and red axle bolts
    • Q-Factor 148 mm, Chain line 43,5 mm
    • Ultra stiff 30mm Aluminum UBB axle
    • Compatible with BSA, ITA, BB86, BB30, BB30 PF, BBRight and BB386 Evo frames.
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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.
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This item is being handcrafted in Spain