Oval chain ring - e...
 

[Closed] Oval chain ring - emperors new clothes or holy grail?

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Looking to make some changes to my drive train and wondering if I should jump on the oval band wagon, do they live up to the hype?


 
Posted : 02/07/2015 6:58 pm
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I'd say you're going to have to try one. I have one, I think it's added a little extra speed at the top and maybe helps with really low cadence stuff, but it's not a game changer.

In summary, the black series ones on CRC are probably worth getting, but I wouldn't pay the extra for the original absolute black ones


 
Posted : 02/07/2015 7:05 pm
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[url= http://singletrackworld.com/forum/topic/have-we-done-oval-chainrings-yet ]Here[/url], [url= http://singletrackworld.com/forum/topic/oval-rings-recent-1x-reviews ]here[/url], [url= http://singletrackworld.com/forum/topic/oval-chainrings-whos-using-them ]here[/url] and [url= http://singletrackworld.com/forum/topic/absoluteblack ]here[/url] and probably loads of other recent ones too.

Summary, some like them, some can't tell the difference, someone brings up Biopace.


 
Posted : 02/07/2015 7:06 pm
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^^ 😀 /thread


 
Posted : 02/07/2015 7:10 pm
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Difficult to tell, haven't tried them yet, I just got them to put on my 1998 spesh stumpy.... I took the bio pace ones off as they just weren't fashionable any more...... ;-/


 
Posted : 02/07/2015 8:45 pm
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I put one on my bike today, a 32 oval replacing a round 30. I quite like trying different things, and at £30 for the CRC absoluteBLACK ones it's no great risk.

On the road to the trails it felt odd, like the cranks kept falling forward, which isn't entirely unexpected I suppose. 2 hours later on the way home I didn't notice this at all.

Going up the way, I found myself using either the same gear or one harder at the back, and using the scientific measure of how well I kept up with my mates I was quicker getting to the top. The lack of a 'dead spot' was very noticeable, but I am a slow cadence grinder rather than a spinner and I suspect the effect could be less distinct for the latter. In addition I found the pedally bits that intersperse the descents a little easier as pedalling felt easier.

It also felt good when pedalling standing up, I think again because it felt like less of a struggle.

A couple of the lads had a shot on it going up the way and they both commented on the smoothness.

I'm rather taken with it based on this first go. I'm a steady Eddie not a racing snake, so maybe the benefit is greater for the likes of me?


 
Posted : 05/07/2015 10:25 pm
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Thanks thegreatape, it sounds like you ride very much like me so I'm looking forward to fitting one on my bike.


 
Posted : 06/07/2015 7:05 am
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Similar to TGA for me. I've got one on a 170mm full sus which is used for everything. On the big climbs I find I'm faster due to a smoother cadence (felt faster and timed faster on Strava). I'm a grinder on climbs and get out of the saddle a fair bit and really notice it over the old round ring. Also went from 30T to 32T oval..
I tried my mate's new bike with a round ring and felt the difference straight away.


 
Posted : 06/07/2015 7:18 am
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I fitted one to my 130mm travel 29er a couple of weeks ago, and I have to say I agree with TheGreatApe about how it seems to have improved my climbing, the biggest thing I have noticed is that I seem to be able to maintain much more traction on difficult technical climbs where I know I was loosing traction on my round chainring.

For the record I have moved from a 32t round to a 32t oval.


 
Posted : 06/07/2015 7:28 am
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I also fitted one yesterday (32t oval, replacing 32t round) and this is spot on:

On the road to the trails it felt odd, like the cranks kept falling forward, which isn't entirely unexpected I suppose. 2 hours later on the way home I didn't notice this at all.

I didn't really notice any difference off road, wasn't a very long or arduous ride, maybe a little smoother when out of the saddle on little rises. Can't see how you'd object to it, just didn't really notice, which is praise in itself I guess.


 
Posted : 06/07/2015 8:15 am
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Is going up by 2 teeth about normal for trying oval rings? Currently on 34t chainring (1x11, 27" wheels), tempted to try it and also have a grind/mash rather than spinny style. Guessing just adding 2 links to the chain would be fine for going up 2 teeth on an oval ring would be fine?


 
Posted : 06/07/2015 8:24 am
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I don't know. I didn't really have a choice as, to my knowledge, a 30T 104 BCD oval isn't available. I was a little hesitant because on the last thread on the matter a couple of guys went from 32 round to 34 oval, based on the go up 2 teeth advice/logic, and found it harder, so evidently that advice isn't always appropriate. On the other hand, I started with 32 round, changed to 30 because I was struggling sometimes, and then have got a lot fitter since then, so I guess that is a factor in the 32 oval feeling fine for me (so far).

Regarding chain length, I didn't have to change mine going from 32 to 30, and likewise for then going to 32 oval. Remember that because your chain only goes round half the chainring at a time, the difference is only half a link.


 
Posted : 06/07/2015 8:35 am
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JUst fitted one now, rode it around the house. Can feel the spot where it's easier. Frustrated now, will be a week before I can test properly


 
Posted : 06/07/2015 9:07 am
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Well I'm a convert!

Went for a ride last night with a mix of terrain and gradients and the oval ring felt great and more natural in no time.

In fact when I swapped bikes with a mate so he could try mine, his round ring felt awkward.


 
Posted : 09/07/2015 8:07 am
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Mines arriving today from CRC,so time will tell. Looking at the other comments I'll be interested to see if I can tell any difference.


 
Posted : 09/07/2015 8:14 am