New White Industries ring design!

[Mark Reimer]

A while back there was talk about running single-chain ring setups with White Industries cranks and how a wide-narrow ring would be fantastic in order to loose the chain keeper.

Drum roll!

They unveiled their own wide-narrow ring at NAHBS today:

http://www.bikerumor.com/2015/03/06/nahbs-2015-white-industries-cuts-narrow-wide-direct-mount-chainrings-new-6-bolt-disc-brake-hubs/

Looks like it's only small rings at the moment, but will grow right up to 48t. This make me so excited. I love White cranks and have wanted this for ages. Perfect for all you single-ring folks out there!

[Matthew J]

Wow.  Wonderful.  46 or 48s can't get in production soon enough!

[Philip Williamson]

I love that. I had good luck with a 1x White setup and no keeper, but I like the narrow/wide idea, too. 

Philip

www.biketinker.com

[Shoji Takahashi]

This is great! Is it for 10-sp chains? or will it be fine for 9-sp chains? (Wolftooth, etc., all seem to-be designed for 10-sp chains.)

I don't know if I'd give up my compact double VBC, though.

shoji

[Mark Reimer]

Should be fine for both I'd think...

And I wouldn't loose the double either, at least not on all bikes. But when a single is desired, this is a great option

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[Joe Bernard]

What does 'wide-narrow' mean?

[Eric Daume]

The teeth alternate between narrow and wide. It serves to keep the chain on the chainring without any other pieces of hardware (jump stops, etc)--very effectively, in my experience.

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[Bill Lindsay]

Let me show you :)

It's a chainring where every other tooth is wide and every other tooth is narrow, fitting the wide and narrow gaps in your chain.  The result is the chain fits more solidly on the chainring and is less likely to jump off.  It's the common setup for a 1x drivetrain.  By running a wide narrow ring you can avoid running a chainwatcher or a vestigial front derailer to keep the chain on.  You can't run wide/narrow rings with multiple chainrings because if you shifted from one to the other and didn't hit the right kind of tooth, the chain would skate on the top, or fall off, or get a narrow gap wedged onto a wide tooth.

[Joe Bernard]

Well. That's pretty nifty. Thanks, gentlemen!

[Matthew J]

And especially nifty coming from White as most wide/narrow on the market are black and work with a limited number of cranks.  Now White crank fans can join the party.

[Roger]

On Friday, March 6, 2015 at 3:56:58 PM UTC-8, Bill Lindsay wrote:

...You can't run wide/narrow rings with multiple chainrings because if you shifted from one to the other and didn't hit the right kind of tooth, the chain would skate on the top, or fall off, or get a narrow gap wedged onto a wide tooth...

I've been trying to picture one thing: do the number of teeth of the chainring plus the cog need to add up to an even number so that the pattern of thick/thin teeth meeting the thick/thin chain doesn't reverse to thick/thin meeting the thin/thick every other time around?

[Cyclofiend Jim]

Yep.  That's the math of it. 

- J

[Bill Lindsay]

Your wide narrow chainring has an even number of teeth. You run whatever cog size you like, odd or even, still works