lining up Rotor Q-Ring to front derailleur

Discuss light weight issues concerning road bikes & parts.
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theStig
Posts: 167
Joined: Mon Aug 06, 2007 1:22 am

by theStig

I'm reading the rotor install guide that indicates there should be no more than 1.5mm of clearance from the teeth to the FD cage.

Does anyone know if they mean this for the tallest point of the chainring or the lowest point?

thanks in advance!

1415chris
Posts: 1071
Joined: Sat Apr 18, 2009 8:59 am
Location: Surrey UK

by 1415chris

Derailleur must be positioned the way that will allow a free movement of the cage over the bigger ring.
If you set it up to the smaller diameter you will not be able to move it on or off the big ring.

kevhogaz
Posts: 225
Joined: Fri Aug 05, 2011 5:18 am
Location: Arizona

by kevhogaz

The highest point of the ring, should be where you take the measurement.

Be patient, pay attention to what you're doing, and these shouldn't be too much of a headache to install.

Murphs
Posts: 1117
Joined: Thu Feb 05, 2009 12:04 am
Location: Gold Coast, QLD, Australia

by Murphs

I find that 1mm at the highest point is about the sweetspot, but be prepared to fine tune the height a number of times.

theStig
Posts: 167
Joined: Mon Aug 06, 2007 1:22 am

by theStig

thanks guys.. this was all very helpful. finally on the road at last.

Going from the small to big ring is still a little wonky and takes several tries. I think I have the gap at a tiny bit less than 1mm, going to try moving it a bit and see if I can get this working properly.

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mvacolnago
Posts: 234
Joined: Tue Jan 05, 2010 12:29 am

by mvacolnago

another tip that may work for you is to adjust the tail of the front d cage inwards (towards the wheel) 1-2 mm more then you would normally. I find this position helps with upshifts.

1415chris
Posts: 1071
Joined: Sat Apr 18, 2009 8:59 am
Location: Surrey UK

by 1415chris

Bear in mind, these rings do not follow to the category of the best gear changing rings :wink:
Having said that, after a number of tiny adjustments finally I can be happy with these fellas.

PS.
I am sure that the flimsy Red with Ti cage plays its role there as well.

Murphs
Posts: 1117
Joined: Thu Feb 05, 2009 12:04 am
Location: Gold Coast, QLD, Australia

by Murphs

I have no problem with mine, once they are set up right.

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