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Fox and Shimano go 15mm
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Fox and Shimano go 15mm
Fork and component manufacturers team up to introduce new, lightweight through-axle standard for XC and all-mountain

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I wonder when Hope will have adapters to use 15mm axles with Pro II front hubs? I wonder whether other fork manufacturers will adopt this new standard quickly or at all. I think I read somewhere that the standard is open for other companies to use so they presumably have the opportunity.

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Wonder if they'll do me a dynamo version at some point

Hurry up and agree on a standard already! 

Surprised it's only that much stiffer than a QR?..... 

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Looks good. I hope Marz and Rockshox adopt it.
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The cynic in me says that although this standard is open, it's a little bit of a ploy to steal a march on the rest of the industry by Fox and Shimano.  I know of some 20mm stuff coming out which isn't exactly going to be heavy, and the only reason I suspect such a weight loss is possible on Shimano hubs is because their 20mm hubs were so unfeasably heavy to start with.  Hope ProII 20mm hubs are 20gms lighter than the 9mm QR versions, as are most other high end hubs. 

Oh, regarding Hope, they knew this was coming and told me they'll have adaptors to fit before long.  Interesting, Alan said the 15mm axle could be used in the currently QR only Pro3.  

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The fork'll be lighter, though, although possibly only to the tune of 5mm of crown each side and a bit of magnesium around the "dropouts" (which we're going to have to come up with a proper name for...)
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Drop ins?
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axle bosses
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love holes

"saves a chunk of weight over 20mm"  are we talking 8 or 9 grams ??

15mm means you can run bigger bearings to be fair so I'm up for that.

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Hmmmm

/sceptic mode/

My 20mm setup isn't exactly heavy...

/end sceptic mode/

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Clearly there's quite a strong element of demarcation here too. By which I mean that Fox has been resisting putting 20mm axles on 32 forks because that would tend to lead to people doing things with them that they really ought not - 20mm axles tend to equate to freeride forks in many peoples' eyes. Introducing a smaller standard gets most of the through-axle benefits but clearly positions forks so equipped as being for lighter-duty use.
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Another case of large cycling brands fixing a problem that doesn't exist IMO.  It would be easy enough to engineer forks/hubs around the current 20mm through-axle standard and save a chunk of weight - IF that were the consideration.  Most people who run through-axles are less concerned about weight than stiffness and longer travel.

I detect the marketeers at work here.

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I think I just said that It's similar thinking to the rationale behind, say, a Pike having not-quite 6in of travel.
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Talking of Pikes; well there a case in point aren't they? They're a 20mm design but not properly-free ridey, and more all-mountainy. What's wrong with them? Why couldnt Fox just stick a 20mm on the 32 range?
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Because a Fox 32 isn't a Pike

Pikes are great - my 20mm axle, 100mm travel fork of choice

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If 15mm replaces QR then I'll be happy. If fork manufacturers just moved all their range, including the lightweight stuff, to 20mm I'd be far happier still. Surely given that the 20mm 'standard' only sets the OND and axle diameter, there's plenty of scope to create lightweight fork ends by varying everything else.
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20mm heavy? Loads of bull methinks. I have a Burgtec front hub 20mm axle and it weights almost nothing. Hope isn't too bulky either. Simple, skip Shimano.
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I'm hoping is that is will encourage manufacturers to use through axles in their lightest forks making them safer for me. The current 20mm standard is fine but nobody uses it on a fork that is suitable for XC racing.
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I think it'd be a good thing, if all manufacturers opted for it, though how much weight saved over 20mm is debatable. That aside, I'd like a through axle revelation, my old '03 enduro frame would be really pushed by putting a pike on it (which I'm very tempted to do) stress wise and I don't want the weight penalty of a pike either, but even with allen bolt skewers done up as tight as I dare I'd still like that extra torsional rigidity when hooning down rocky descents so that there's less deflection and better control, etc. Thge 15mm standard would be ideal for forks less than 140mm travel combining the best of both worlds, plus as Dylan said, you can use bigger bearings without a bigger hub than with 20mm which are better able to cope with high loads, so that would keep running costs down too.
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A Pike would be perfect for your Enduro Clocky, they're not that big a fork. There's one on the front of my 46 now and, to be honest, it feels small.

Surely, with a smaller axle, they'd use a smaller (both ID & OD) bearing? Smaller bearing - smaller & lighter hub?

 

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