Not Q-Rings, but this people has tested Rotor Cranks vs Normal Cranks and not found any difference in TT performance.velobob said:I am curious if anyone has done tests with these or used them. I like the concept and it seems like more pros are using them these days:
http://www.rotorcranksusa.com/i1-q-rings.shtml
COMPARISON OF POWER OUTPUT BETWEEN ROTOR AND NORMAL CRANKS DURING A 16.1KM TIME TRIAL.
W. Hailes, S.E. Gaskill, and B.C. Ruby.
Human Performance Laboratory,
Department of Health and Human
Performance, The University of Montana,
Missoula, MT, U.S.A.
Source: http://www.bases.org.uk/newsite/pdf/Abstract book etc.pdfIn conclusion, the theoretical improvement in cycling efficiency by eliminating the dead spot of the pedal stroke did not translate into an improvement in cycling performance during 16.1km time trial cycling.
Ale Martinez