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radouf

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Posts: 21
Reply with quote  #1 
Hi guys, I'm in the process of outfitting my Private Jake with an oval chainring and I need help with the specifics. I'm thinking of picking up a Wolftooth elliptical for the bang-for-your-buck factor vs the more expensive Absolute Black and SRAM options, and lastly 36t is what I think will suit my needs the best.

However I'm not exactly sure as to which variant I should purchase as far as to offset and such go. Wolftooth offers many offset variants and I want to make sure that I'm not going to screw everything up. They're: 
  • Standard: 47mm chainline, 6mm offset for cyclocross and road cranks
  • Standard: 49mm chainline, 6mm offset for GXP and long spindle BB30  
  • Boost: 52mm chainline, 3mm offset
  • BB30: 49mm chainline, 0mm offset for BB30 short spindle cranks
Now as you can see on the Private Jake spec page up there, I'm on a SRAM Rival 1x11 system and original cranks & bottom bracket. What offset should I be picking up? For the 36t ring, they only appear to have standard (49mm chainline / 6mm offset) in stock at the moment. Is this what I need? Clueless. Looking for more informed input. Thanks guys!

/edit -- BONUS BIT: if ya wanna talk me into getting some other brand of ring, I'm all ears. Just on a tight budget because there are a badjillion things I wanna upgrade on my new rig. Cheers some more.
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dangle

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Reply with quote  #2 
The Wolf Tooth link you gave literally shows you exactly how to figure out which ring you need. Take your crank out and measure it just like the picture from your link.
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vinimartins

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Reply with quote  #3 
Hi @dangle,

I'm using the AbsoluteBlack 46-30 and I'm loving! I don't with exactly model do you need or will fit you better, but the oval shape of AbsoluteBlack works smothly to me.

I'm planning to buy the 38 teeth .

Vini
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Josh33172

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Reply with quote  #4 

As another mentioned, WT's website does a good job of explaining how to go about getting exactly what you need...

 

However, I can speak to their quality having rode ROTOR, Absolute Black, and Wolf Tooth. I like all three, but I have to say that I believe Wolf Tooth's are made the best IMO. Whatever the heat treating they use does seem to produce a stiffer ring. That said I have two Absolute Black elliptical rings on both my MTBs right now and haven't had any problems, but running a WolfTooth on my gravel bike.

 

I have been running oval rings for about 11 years now, and to me it feels like it smooths out the pedal stroke and I get less cramping. Both of which can be considered anecdotal evidence but I don't care....its engineering that I've seen benefit from, and I see no reason to deviate from what works.


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Ibis Ripley LS

GT Peace Tour Disc Commuter

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velogeorgia

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Reply with quote  #5 
Another vote for the Wolftooth! I use their oval rings on both MTB and gravel bikes. Best quality available.
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radouf

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Reply with quote  #6 
Quote:
Originally Posted by velogeorgia
Another vote for the Wolftooth! I use their oval rings on both MTB and gravel bikes. Best quality available.

Thanks guys, Wolftooth seems to be the one! I only need to make up my mind as to what size to finally get -- I've been real busy with upgrading my wheelset [Novatech 30 -> DT Swiss ER1600 Spline 32 ✓] and my handlebars [Kona stock 44 -> Salsa Cowchipper II 42 ✓] and also being generally unsatisfied with how my brakes perform [TRP Spyre with stock pads and disc I believe], so my plate has been kinda full lately, so not rushing the chainring issue.

I also have been riding with roadie-r buddies and it made me hesitant on downsizing the ring, for top speed. However the steep climbs they do tackle do encourage me to. 

Can anyone confirm what the actual effect on input vs output is? Say, if I were to change my 40t round ring toward an ever so slightly smaller 38t Wolftooth oval? Is it even worth it? I have the general idea that 38 oval may feel almost like a 36 while delivering the output of a 40. Is that fantasyland? 

Cheers guys.
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dangle

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Reply with quote  #7 
Quote:
Originally Posted by radouf
Can anyone confirm what the actual effect on input vs output is? Say, if I were to change my 40t round ring toward an ever so slightly smaller 38t Wolftooth oval? Is it even worth it? I have the general idea that 38 oval may feel almost like a 36 while delivering the output of a 40. Is that fantasyland?


It's fantasyland. A 38 will feel like a 38 more than it will feel like a 36 or a 40.
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Josh33172

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Reply with quote  #8 

Having gone from a 42T round to a 40T oval, the 40T feels easier as a 40T should being that its two less teeth, but it does spin over a lot easier than I thought it would, and it does spin over a lot quicker than my Absolute Black rings that I have on other bikes.

This is my first go with Wolf Tooth's "PowerTrac Elliptical" Which I guess is suppose to not be as dramatic of an oval as other brands.

I'd say that its not worth trying, or even getting the same size ring as you're currently running.

Personally, I like the oval rings, I do see a performance benefit with it over the round rings in that I don't have problems with cramping with it, as opposed to the 42T round ring I was using before, and this isn't just this time. I've had problems with cramping before that "mysteriously" disappeared when switching to an oval ring. I don't have any other substantiating evidence to support this, but it does seem to be the case, at least for me.


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Trek Boon 5 Disc

Ibis Ripley LS

GT Peace Tour Disc Commuter

Cervelo S2 Ultegra

Kona Honzo ST Singlespeed

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clarksonxc

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Reply with quote  #9 
Just purchased a 38T WolfTooth PowerTrac ring for cx.  Never used 1x or elliptical before, great idea to try two new things at once, right??!?  Anyways I've heard good things about elliptical, with the one major negative being front shifting quality.  With a 1x setup that problem vanishes, so why not give it a go?  I'll report back after I get some hours on it...
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