Oval chainrings

[bmw1za]

How did I miss this Thread? 

 

To the oval Guru's , I've been on rotor Q rings(39/54) and rotor 3d Crank for a year if not more(Road bike), will not go back to round ever, It eliminated the biggest dead spot ever... mashing reduced a lot.

 

The magic question for me : How the heck do I find out if moving the chainring position forward / back will further improve efficiency and/or power ? Or do I really HAVE to:

1) turn it back , Do a test ride  and

2) turn it forward , do a test ride

 

Surely there is some or other holy grail easier method

[robsc]

The only way I can see you turning it forwards or backwards would be a full 90 degree's , that would surely nullify the oval . Or am I incorrect ? 

[NotSoBigBen]

The only way I can see you turning it forwards or backwards would be a full 90 degree's , that would surely nullify the oval . Or am I incorrect ? 

 

I think they look like this so have lots of options ... unlike many of the MTB ones that have just one 'correct' way?

 

[robsc]

Thanks NSBB , makes sense now . Wow that gives one some serious adjustment . I would be continually tinkering 

[NotSoBigBen]

Thanks NSBB , makes sense now . Wow that gives one some serious adjustment . I would be continually tinkering 

 

I remember with the older Rotor rings they did give suggestions for TT vs road about where to start ....

[Vetseun]

Armpies it.... Ag sorry I meant Google it.

There are guidlines as to use it to the max.

[Martin PJ]

http://www.aliexpress.com/store/1711284

 

Check this shop out. I am using one of these bought from this shop.

[Captain Fastbastard Mayhem]

Just bought a Kalbo 34t elliptical to replace my 30t normal. 

 

Afkak, here I come. Should be a big enough change to determine whether oval is all it's cracked up to be. 

[AlanD]

Just bought a Kalbo 34t elliptical to replace my 30t normal.

 

Afkak, here I come. Should be a big enough change to determine whether oval is all it's cracked up to be.

Sjo, that a big jump...that oval better work as suggested or there might be some walking along side that beast of a bike ☺

[AlanD]

http://www.aliexpress.com/store/1711284

 

Check this shop out. I am using one of these bought from this shop.

Some nice blind items here.

[Captain Fastbastard Mayhem]

Sjo, that a big jump...that oval better work as suggested or there might be some walking along side that beast of a bike ☺

Walking = crosstraining. 

 

LOL. 

[AlanD]

Walking = crosstraining.

 

LOL.

Haha..not sure walking counts as cross training...maybe jogging/running

[Martin PJ]

Some nice blind items here.

 

This is my son's bike. 34 T oval.

[Thermophage]

Walking = crosstraining. 

 

LOL. 

Come "walk" with us tomorrow mornign at G Spot 8am

[AlanD]

This is my son's bike. 34 T oval.

Looks lekker. You seem to purchase a lot from overseas. Does it work out cheaper than local?

[Martin PJ]

Looks lekker. You seem to purchase a lot from overseas. Does it work out cheaper than local?

 

Yep, from the Aliexpress shop I showed above. I paid 30 USD for the item above, it is now at 20 USD, so R300. Took 6 weeks to arrive. Postage is included in the price.