E.thirteen Odd Size Chainrings
Monday, March 10th, 2008
For the past several years, e.thirteen’s guide rings have been many riders’ top choice for single ring applications and especially use with chainguides of all types. Not sure whether to run a 36t or 38t? Split the difference and run a 37t guide ring for your race! Odd-sized guide rings let riders choose gearing that’s perfect for them.
Odd-sized guide rings are available in 33t, 35t, 37t, and 39t options. All e.thirteen chain retention systems are compatible with the odd-sized guide rings.
We have got a 37t and a 39t chainring as well so look or them on upcoming builds. The 37t ring weighed in at 48g, and the 39t weighed in at 60g
Their blend of light weight, low wear, and high strength help them complement the performance of any chainguide. Odd-sized guide rings are the next step for riders dialing in their drivetrains for race day.
e.thirteen components is a small, rider-owned and operated company that strongly supports dozens of grassroots races, series, contests and other riding events all over the world every year. Founded in 2001, e.thirteen’s innovative, functional, simple and lightweight chain retention systems have made them a world leader in this category, and the choice of top pro and amateur riders and mechanics alike. They support a worldwide distribution network and take great pride in offering devoted customer service.
Previous Coverage
March 10th, 2008 at 4:24 pm
I never understood why no one has thought of doing this in the realm of DH / MTX before… it almost seemed like there was an unspoken consensus among shops and companies that if you ran an odd-numbered chain ring you would accidentally open a cross-dimensional porthole where time and space would come to a standstill and every molecule in your body would explode at the speed of light… Complete Protonic Reversal.
Egon warned us of this when crossing the streams… to be honest, I fear he may be right.
Seriously though - finally, we can get at the “sweet spot” in our drivetrains. Well done guys!
=)
March 10th, 2008 at 5:03 pm
I don’t understand. How does changing the size of the chain ring make it perform its function better?
March 10th, 2008 at 5:07 pm
It gives you more possibilities for what gear ranges you can run. If a 36 just isn’t quite enough (not enough top end for example, but a 38t is too steep of a gear) a 37t may fit the bill.
March 10th, 2008 at 6:16 pm
And i just bought an e.13 38toother. Drat. A 37 would have been PERFECT!!!
btw - you have a typo in the 3rd paragraph.
March 10th, 2008 at 6:58 pm
37t is exactly what i neeeeed. i’ve always wondered why we never had odd numbers for chain rings….but now we do! very cool.
March 10th, 2008 at 8:30 pm
There is a theory that odd sized rings and cogs last longer, too. Even tooth rings always engage the chain the same way, each tooth gets a narrow link or a wide link, always. Odd tooth counts mean the chainring teeth engage a different type of link with each revolution.
Probably a crock of crap, but it sounds good.
March 10th, 2008 at 8:31 pm
But now that I think about it that theory only applies to singlespeed drivetrains.
March 11th, 2008 at 6:48 am
Blackspire has been doing odd sizes for years, I have a 39 and 35 here. The great thing for these is that bmx races will use them on their dxr or saint cranks which seem to be all the go atm.
March 11th, 2008 at 10:19 am
I have been talking about needing this for a while now, I will order them as soon as they are available.
March 12th, 2008 at 1:54 am
A bit off topic, but can you run a 33(or smaller) on an LG1?
March 12th, 2008 at 6:18 am
Ok. When they will produce a bashguard for each size? till now they don’t produce bash guard between 36 and 40t, another to think about it…
March 12th, 2008 at 9:32 am
Actually… i doubt they will do that. A 36t bash actually can cover a 38t bash technically and a 32t e13 bash can cover up to a 34t, etc.
There are enough sized bashes i feel ot there to cover the full gambit of chainring sizes with this buffer.
Nick - I think you can, but you may need a new e13 backplate to do it, email e13 and ask them if you’re interested.
March 12th, 2008 at 10:41 am
what next - 36.5t?
maybe someone here need eactly this 1/2 tooth
March 12th, 2008 at 11:38 am
E13 says that you must mount a 40t bash for a 38t ring and not a 36t bash because of the elasticity of the plastic used for the bash.
March 12th, 2008 at 12:07 pm
You will loose some clearance, but personally I don’t see how there is a “must mount a 40t bash for a 38t ring” but it will definitely give you a bigger/safer cushion.
March 12th, 2008 at 7:48 pm
would a 37t ring fit on a Gamut P30 guide?
March 12th, 2008 at 8:18 pm
Tom - the 37t is a tight fit on the p30 but it looks like it will fit technically but the spacing is tight as the P30 is a 36t specific guide. How well will it work, can’t say.
The problem is that the bashguard barely covers the 37 teeth so in the event you do bash into something, you may nick the chain/chainring.