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Rotor Q-Rings vs. MDT Oval Chainrings vs. Osymetric...What's the Difference?

 

   


DC Pattie

Dec 16, 05 8:04

Post #1 of 15 (4329 views)
Rotor Q-Rings vs. MDT Oval Chainrings vs. Osymetric...What's the Difference? Quote | Reply

Q-rings and Osymetric both cost $200 (once you convert from euros) and the MDT's are $336 converted, besides the price, are there any other noticeable functional differences between them? How about the way the work with the front derailleur?

Dave in VA


DC Pattie

Dec 16, 05 9:18

Post #2 of 15 (4296 views)
Re: Rotor Q-Rings vs. MDT Oval Chainrings vs. Osymetric...What's the Difference? [DC Pattie] [In reply to] Quote | Reply

bump-o


luarcazuma

Dec 16, 05 9:33

Post #3 of 15 (4282 views)
Re: Rotor Q-Rings vs. MDT Oval Chainrings vs. Osymetric...What's the Difference? [DC Pattie] [In reply to] Quote | Reply

You can regulate in 5 different positions the Q Rings, and not the MDT.


DC Pattie

Dec 16, 05 11:11

Post #4 of 15 (4255 views)
Re: Rotor Q-Rings vs. MDT Oval Chainrings vs. Osymetric...What's the Difference? [DC Pattie] [In reply to] Quote | Reply

Bump

Come on guys, I'm thinking of slaping a set of these chainrings on my bike this spring but need some more feedback.

Dave in VA


Mad Jee

Dec 16, 05 11:24

Post #5 of 15 (4245 views)
Re: Rotor Q-Rings vs. MDT Oval Chainrings vs. Osymetric...What's the Difference? [luarcazuma] [In reply to] Quote | Reply

Can you elaborate on this a little bit. I understand the concept behind Q-Rings and am very interested in them, I just don't really understand the specifics. I am guessing you don't just slap them on there, it matters where the are mounted in relation to the crank is that correct? If there are 5 different positions as you say how do you know how to mount them? Thanks.


Portside Athletics Blog


DC Pattie

Dec 16, 05 11:27

Post #6 of 15 (4243 views)
Re: Rotor Q-Rings vs. MDT Oval Chainrings vs. Osymetric...What's the Difference? [SwBkRn44] [In reply to] Quote | Reply

I would also like to hear how well they work with Shimano front derailleurs.

Dave in VA


hedfan

Dec 16, 05 11:48

Post #7 of 15 (4230 views)
Re: Rotor Q-Rings vs. MDT Oval Chainrings vs. Osymetric...What's the Difference? [DC Pattie] [In reply to] Quote | Reply

ok - to answer a few questions here - until Gary gets on line

1. The rings have multiple adjustment points which essentially - move the elliptical part of the ring - further around the crankset - so you experience a higher gearing at different parts of your crank arm positioning. There is a suggested starting point which you can simply change manually with an allen wrench - and there are suggestions as to the effect it has in different parts of the revolution - ie. the apparent gearing change you will experience



2. Front Der - all you need to do is move your front der higher up on the mounting bracket - to accommodate the higher point in the crank twice per revolution.


harm

Dec 16, 05 21:30

Post #8 of 15 (4169 views)
Re: Rotor Q-Rings vs. MDT Oval Chainrings vs. Osymetric...What's the Difference? [DC Pattie] [In reply to] Quote | Reply

I'm (still) waiting for my mdt's. i will put a review here when i test them.

One of the differents of the ovl/osymetric vs mdt is that they can make the mdt in almost any (oval) shape you want/need ( i had the choice somewhere between 53t 20% and 55t 10%. They also look sexier. They are pricey though.


DC Pattie

Dec 18, 05 5:54

Post #9 of 15 (4120 views)
Re: Rotor Q-Rings vs. MDT Oval Chainrings vs. Osymetric...What's the Difference? [harm] [In reply to] Quote | Reply

"i had the choice somewhere between 53t 20% and 55t 10%."

So the bigger rings have a less pronounced "oval" to them?

Dave in VA


harm

Dec 18, 05 6:58

Post #10 of 15 (4103 views)
Re: Rotor Q-Rings vs. MDT Oval Chainrings vs. Osymetric...What's the Difference? [DC Pattie] [In reply to] Quote | Reply

no, you can also have a 60T with 20%, but my front derailleur can't handle a bigger one ( if i measured it right).

the maximum size of the oval with a 53t 20% and the 55t 10% is about the same as a 57,5t.


luarcazuma

Dec 18, 05 7:08

Post #11 of 15 (4100 views)
Re: Rotor Q-Rings vs. MDT Oval Chainrings vs. Osymetric...What's the Difference? [DC Pattie] [In reply to] Quote | Reply

Iīll try to explain it with my english:

There is a neutral position with The Q Rings; Position 3. In this position, with the long axis of the ring totally vertical, the crank is at 16:00 in an imaginary clock.



Theoretically, the higest power is with the crank at 15:00, but this position dosnīt considere the inerce of pedalling. This is the regulation of the Osymetric Rings, and you can get that regulation with Position 1 with Q Rings.

For me, Position 3 was too easy to move, but very good if you have some type of knee injuries. The feelings (for me) was like to change to little ring without expeting it.

In position 2, at 15:30 (now Iīm using it), I take advantage of inerce, and my knee (injuried in 2003) is OK.

You can try position 4 or 5 to have minimal impact in your knee, and to avoid the point where you canīt applicate power (dead point???),,



Iīve seen powerful and low cadence cyclists being comfortable in position 1, but I think this position could be more indicated to high cadence cyclists.



Itīs easier to be accustomed to Q Rings if you came from round rings tha if you came from Rotor Cranks,,, anyway, this time uses to be very short



Another diference,, Osymetric is more squared in the dead point..


JustJulian

Dec 18, 05 7:10

Post #12 of 15 (4099 views)
Re: Rotor Q-Rings vs. MDT Oval Chainrings vs. Osymetric...What's the Difference? [AndrewJ] [In reply to] Quote | Reply

Is the smoothness when going from the big ring down or up comparable to standard round chainrings? It would appear that one would have to be extra careful changing given that the derailleur will be further away than is optimum for a good part of each revolution.


"How bad can it be?" - SimpleS


hedfan

Dec 18, 05 7:27

Post #13 of 15 (4094 views)
Re: Rotor Q-Rings vs. MDT Oval Chainrings vs. Osymetric...What's the Difference? [JulianInEngland] [In reply to] Quote | Reply

Julian

I found the difference to only be slight


JustJulian

Dec 18, 05 7:28

Post #14 of 15 (4092 views)
Re: Rotor Q-Rings vs. MDT Oval Chainrings vs. Osymetric...What's the Difference? [AndrewJ] [In reply to] Quote | Reply

That's surprising, I would have expected it to be rather pronounced.

Thanks.


"How bad can it be?" - SimpleS


fredly

Dec 18, 05 7:52

Post #15 of 15 (4084 views)
Re: Rotor Q-Rings vs. MDT Oval Chainrings vs. Osymetric...What's the Difference? [DC Pattie] [In reply to] Quote | Reply

One big difference is that the Ossymetric rings aren't oval. They have a very specific shape, and (buy the concept or not,) a really tight patent to go with it.



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