ROTOR Q-Ring XT 8000 2-speed black

Show all items from ROTOR
  • Caution:
    The images above are symbolic in nature and may differ from the actually delivered goods respectively the delivery inclusion might differ.
    Hence we please you to carefully read the item name and the item description. Just drop us a short mail in case that you have questions though.
  • You can find more information about what there is exactly included in delivery on the left-side menu.
  • Improve your performance by using oval chainrings! Oval chainring with 12.5% ovality. The Q-ring has the largest diameter at the point of greatest power output, the smallest diameter at the top dead center. With the patented OCP system adjustable in 3 positions to suit your riding style and needs.

    Easy adjustment without dismantling the crank, so the different settings are easy to test.

    The specific Wide Narrow tooth design prevents the chain from jumping off without the need for a chain guide. CNC milled and durable due to hard anodized surface.

    For double cranks available in 39, 38 and 36 teeth on the outside, 26, 25 and 22 teeth on the inside.

    96mm BCD
  • Rate this product

    •  
    • Unfortunately, there isn't any review yet. Be the first one and share your experiences with thousands of other riders!
  • 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
  • Customers who viewed this also viewed:
Almost worldwide delivery
Large stock & affordable prices
You are here:
This item is crafted in Spain