Rotor Oval ring sizing

Triathlon Forum
1

thinking of trying q rings this year

target race is im lake placid, so i was going to do 50t, which is what i currently run on my compact quarq,

is there a chart that shows what the max and min tooth equivalent is with these rings?

i should i look at a 52t q ring to get max benefit? or does the 50t provide a larger equivalent ring in the power phase?

2

53 x 39 Q-Rings with a 11-25 cassette is my choice.

3

im not a bif/strong rider, 180 ftp 140lbs…
so ive always gone 50t big ring for 90% of my riding

4

Hi I run a 50t q ring, as you turn the cranks the 50 becomes a 53 at the downstroke then gets less on the upstroke, ive used it for everything tris to time trials, ive no intention of changing as I like them
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5

Direct from Rotor:

" A 50T Q-Ring, around the upper dead-spot is equivalent to a 48T, but as the pedal goes down and more strength is applied, the equivalent chainring tooth size reaches 52T."
“A 53T Q-Ring, around the upper dead-spot is equivalent to a 51T, but as the pedal goes down and more strength is applied, the equivalent chainring tooth size reaches 56T.”

http://www.rotorbikeusa.com/products/qrings_compact.html

Hope that helps.
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6

perfect! now i just need to figure out if in csn get the aero rings on my elsa

7

I find that a 53t q ring feels ‘bigger’ than a 53t round ring. So if you’re riding a round 53t and wanna try q rings, I’d go for a 52, maybe even a 50.

8

I would go with a 50. It’s plenty big at the large diameter (roughly a 53), yet small enough to push the gear at the smallest. I’ve tried a 52 Q-ring and it feels larger than a 53 round.

9

I have a compact Cannondale Quarq powermeter. I obtained the Rotor 50T ring but was unable to install it on my Cannondale cranks due to the design of the powermeter. I had no problem in returning the Rotor rings for a refund and notified Quarq of the design issue with rotor rings. I hope yours work well.