Rotor Q-Rings help to minimize the time spent in the dead spot while pedaling. While oval chainrings have historically been controversial, we believe that allowing a rider to fine tune the chainring position offers opportunities to minimize the dead spot never before realized with conventional chainrings.

How do Q-Rings work?

Q-Rings reduce dead-spot negative effects due to its effective variable gear oval concept. The effective gear is lower at the dead-spot zone, so it is easier, faster and more comfortable (smoother) to pass through it. Once the pedal is over the dead-spot and enters the down stroke, the Q-Rings progressively increase the effective tooth size as more muscle strength is available.

A 53T Q-Ring at the dead-spots is equivalent to a 51T, so it is easier to move through the dead-spot. But as the pedal goes down and more strength is available you can see how the gear (effective tooth size) gets bigger: reaching the equivalent chainring tooth size of 56T during the power phase.

All models of road and compact Q-Rings are compatible with both Shimano and Campagnolo drivetrains, 8/9/10 speed, and are specially beveled to fit most cranksets such as Dura-Ace 7800, Ultegra, FSA SLK, FSA K-Force, Zipp 300, Truvativ, and most other models. One exception being exotic carbon cranksets with overbuilt spyders. With exception to the singlespeed specific models, all Q-Rings are ramped and pinned and include chain drop prevention pins. The 53T Q-Ring measures 231mm at the major dimension, equivalent in size to a standard round 56T chainring. The 54T AERO Q-Ring measures 234mm at the major dimension, equivalent in size to a standard round 57T chainring. Road Triple Q-Rings use the same standard 130BCD size as the Road Double sets, size 54/53/52/50/48/46T. There is presently only one size middle and inner in the Triple Q-Rings.

Weights are 153g for the 53/40T Q-Rings set, and 152g for the 54T AERO Q-Ring. The outer 50T 110BCD compact Q-Ring does not fit the Campagnolo or Shimano compact cranksets without excessive machining, however it does fit 2005+ FSA (including the 2007 K-Force Light), Truvativ and other compact cranksets. Known cranksets not compatible are:

• Campagnolo Compact cranks: At this point in time, only the 41t inner road double chainring for Campagnolo will fit the new compact crank. If demand is sufficient, we will design a specific Q-Ring for these cranks.
  
• Stronglight compact cranks: A number of Stronglight compact cranks have been known to pose problems in installing Q-Rings because of carbon fiber reinforcements that interfere with the OCP ring behind the crank arm.
  
• Some models of FSA pre-2005 Carbon cranks: A ridge on the back of the crank arm on (some models of) 2004 and earlier FSA carbon cranksets prevents Q-Rings from being installed on these cranks.
  
• New Shimano Compact cranks: Q-Rings will not fit the new 2006 Shimano compact road cranks.
  
• Dura-Ace 9-speed Triple cranks: The inner small Q-Ring will not fit the 130/92BCD Dura-Ace FC-7703 9-speed Triple Crankset. The middle and outer rings will fit.
• SRM Dura-Ace Compact cranks: You can use Q-Rings on the 110/130BCD SRM Dura-Ace Compact cranks. Just order the 36T 110BCD inner and 50T 130BCD outer Q-Rings.

What’s the best OCP setting for my road bike and my riding style?

• For road bikes, use the default setting as recommended in the user guide (OCP #3)
  
• For forward positioned TT and tri bikes, start with the outer Q-Ring OCP #3 setting for two weeks, then try the #4 setting and see how it feels. Each rider has different needs and preferences ... one of the best features of Q-Rings is that the OCP system (multi-position bolt holes) are designed to suit your individual riding habits, body geometry, strength and position on the bike.

Shipping:
Shipping to worldwide,i can complex multiple items in one box for save shipping fee.There are two shipping methods available.
1.EMS Express:
   USA -US$15.99 - 4 to 7 days
    West Europe country,Canada - US$21.99 - 4 to 7 days
   Australia and East Asia - US$13.99 - 4 to 6 days
   East Europe,West Asia,South America,Africa and other countries - contact me to require for the fee before bid
2.Airmail:10-15 days,but sometime and some country need 30 days or more.Can not be tracked online.
All countries - US$5.99

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