Rotor Q-ring 38t downhill chainring review



Rotor Q-ring Downhill 38t Chainring

BikeRadar verdict

65.0 out of 5 stars

"Effective bit of kit but only available in red and at a price"

Friday, July 17, 2009 3.00pm By

The Q-Ring is designed to do two things – give assistance through the dead spot of the pedal stroke by reducing the effective gear, and enhance the point of most force, or ‘Q-moment’, by raising the effective gear.

Using the middle of the three orientation settings – these allow you to tune the maximum power, as flat pedal riders will hit maximum power later in the stroke than clipped-in riders – pedalling is smooth and the extreme elliptical shape not even noticeable.

What is noticeable though, is that the Q-Ring succeeds in doing exactly what it sets out to do. Gearing does feel easier through the dead spot and seems to increase through the power stroke, without feeling lumpy or pulsing.

You'll need to adjust your chainguide to allow the elliptical ring to spin through untouched, leaving a big gap between the guide and chainring at the ring’s two low points. This gap does mean that the chain’s security is slightly at risk but we’ve suffered no problems as yet.

Whether the Q-Ring is worth the money over a traditional ring is a different matter, but those out there looking to shave fractions of a second off should certainly take a look. Former world champion Fabien Barel swears by these odd-shaped rings after all...

What's the score with BikeRadar reviews? You can find a full explanation of our ratings here.

User Comments

Submit Your Review:


Q-Ring Downhill 38t Chainring

Available Colours:
Red Anodised
7075 T6 Aluminium
Chainring Size (No of Teeth):
Number Of Bolts:
Chainring Set-up:

Latest questions

Related links