Rotor Q-ring question

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addictR1
Posts: 1878
Joined: Sun Jun 10, 2012 1:11 am

by addictR1

since i have a 2012 SRAM RED crankset 50/34 - 110BCD compact crank right now but want to go to mid-compact with Q-Ring chainrings in 52/36, do i just need the 2 chainrings or are there any shim or adapters i would need as well?

also, is there a package that has both of these 52 & 36 chainring together? or are they generally sold separately?

by Weenie


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grouk
Posts: 232
Joined: Wed Sep 17, 2014 5:29 pm

by grouk

they are sold separately 150€ big 50€ small for bcd 110 you dont need any adapter

addictR1
Posts: 1878
Joined: Sun Jun 10, 2012 1:11 am

by addictR1

thanks grouk...

also, i noticed from Rotor's site... there's Q-Ring and then there's QXL? seems QXL is more expensive... any difference between the two?

jorisee01
Posts: 386
Joined: Mon May 04, 2015 8:22 pm

by jorisee01

Yes, Q is 7% oval and QXL is 14%


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addictR1
Posts: 1878
Joined: Sun Jun 10, 2012 1:11 am

by addictR1

i see on rotors site that the QXL are more meant for experience rider with larger muscle mass, fast twitch dominant.

http://rotorbike.com/products/road/q-rings-or-qxl_174
KEY FACTS
• Do not replace, but complement standard Q-Rings
• 16% ovality instead of Q-Rings’ 10%.
• For experienced Q-Ring / NCC users.
• For specific types of cyclists (fast twitch dominant).

Image

i plan to use this mainly on my climbing bike with some flats.. so would using QXL make my climb a lot tougher as compared to regular Q-rings?

jorisee01
Posts: 386
Joined: Mon May 04, 2015 8:22 pm

by jorisee01

Ah, that were the correct percentages!


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addictR1
Posts: 1878
Joined: Sun Jun 10, 2012 1:11 am

by addictR1

i don't have thighs like muscle builder and tend to spin uphill seated. but i do sprint from time to time on the flats... just worried maybe the QXL is a bit much for my knees going uphill.

grouk
Posts: 232
Joined: Wed Sep 17, 2014 5:29 pm

by grouk

i use qxl i am a big guy 187cm 76/78kg in best form 4,61w/kg i love the felling of pushing the big ring 52t in the drops or in the 3%/4% climbs or that small hils 30s to 1min that you pass a 500/600w but in the hard and long climbs 12%+ 30/40min i think the 36 oval is harder to push, i dont think there is a effective gain but i just love that filling

Grill
Posts: 662
Joined: Mon Aug 20, 2012 12:12 pm
Location: Oop North

by Grill

addictR1 wrote:i see on rotors site that the QXL are more meant for experience rider with larger muscle mass, fast twitch dominant.

http://rotorbike.com/products/road/q-rings-or-qxl_174
KEY FACTS
• Do not replace, but complement standard Q-Rings
• For experienced Q-Ring / NCC users.
• For specific types of cyclists (fast twitch dominant).


This is all BS.

addictR1
Posts: 1878
Joined: Sun Jun 10, 2012 1:11 am

by addictR1

grouk: humm.. harder to push up a 12% grade with 36t? u talking about muscle burning sensation? ;)

Grill: maybe all marketing BS. i've read some ppl's blog that they actually find the QXL easier to ride with. my buddy has it on his cervelo S5 and he said it's easier to spin.. but again.. he is short and have massive quads.

Grill
Posts: 662
Joined: Mon Aug 20, 2012 12:12 pm
Location: Oop North

by Grill

grouk wrote:i use qxl i am a big guy 187cm 76/78kg in best form 4,61w/kg i love the felling of pushing the big ring 52t in the drops or in the 3%/4% climbs or that small hils 30s to 1min that you pass a 500/600w but in the hard and long climbs 12%+ 30/40min i think the 36 oval is harder to push, i dont think there is a effective gain but i just love that filling


Where are these 12% climbs that are taking you 30-40 minutes? If you put down the power you say you do then they shouldn't take you that long (unless you're really fat).

grouk
Posts: 232
Joined: Wed Sep 17, 2014 5:29 pm

by grouk

i wanted to said long climb with long sections with two digits inclinations, and yes i have many of them here.(Portugal)
i wanted to said i have the perception that is a litle harder to spin when you are climbing long time and the inclination passes from one to two digits

Grill
Posts: 662
Joined: Mon Aug 20, 2012 12:12 pm
Location: Oop North

by Grill

Okay. makes much more sense.

addictR1
Posts: 1878
Joined: Sun Jun 10, 2012 1:11 am

by addictR1

ok, just ordered the 52/36t in 110BCD for my SRAM crank. i wonder how much weight will these add as compared to my existing 50/34 chainring.

oh.. and i just installed a new KMC chain.. so i guess now i need to connect the existing links back on. which pin should i get to connect the additional links back that would work with KMC 10 speed?

by Weenie


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NiFTY
Posts: 1493
Joined: Sat May 26, 2012 11:26 pm

by NiFTY

Just have a look at chain length when the new rings are installed, you might not need to add any additional links. If the chain has been used you shouldn't really be adding new links to it as the new links will be shorter due to bushing wear on the old chain links. If extending the chain and the chain is brand new or lost, get a KMC missing link, unclip the old one and length the chain. (it will now have 2 missing links.
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