reducing 15mm thru axle fork to 12mm

Discuss light weight issues concerning mountain bikes & parts.

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visse89
Posts: 7
Joined: Sun Jan 07, 2018 11:17 pm

by visse89

not sure if this helps or make sense but mine looks like this.

Image

joejack951
Posts: 462
Joined: Fri Feb 18, 2005 6:50 pm
Location: Wilmington, DE

by joejack951

visse89 wrote:
Sun Sep 23, 2018 8:18 am
not sure if this helps or make sense but mine looks like this.

Image
If I am seeing things correctly, that looks like a 'Syntace' style front axle. I didn't know such a thing existed. Do you have pictures of the axle and dropouts?

by Weenie


joejack951
Posts: 462
Joined: Fri Feb 18, 2005 6:50 pm
Location: Wilmington, DE

by joejack951

spud wrote:
Fri Sep 21, 2018 10:34 pm
possibly another, easier solution is a piece that threads into the 15mm side and takes it down to 12 mm, plus a slip sleeve locktited into place. Use as a straight 12mm axle, with allen head cap screw on the end, then you can accommodate a little bit of dropout thickness variance. Not ideal, but it will allow you to swap wheels between bikes easily.
I'm not sure what you are describing here. Can you sketch it out?

Whatever I do, I don't want the modification to be permanent for several reasons. What I'll likely do is add an o-ring groove on the slip-fitted piece that reduces the NDS to 12mm. This will hold it, and any spacers, in place during wheel changes. Using a separate slip fitted piece allows for using off-the-shelf axles rather than producing my own, with all the costs and headaches that incurs. I just need to be sure there are standard axles that will work with my proposed design.

babgvant
Posts: 1
Joined: Mon Dec 17, 2018 11:09 pm

by babgvant

I just picked up a 2016 Trek Domane frameset and it comes with 15mm (shown) and QR inserts for the fork. Would love to have a 12mm insert so I can swap wheels between bikes easier.

Anyone know where I can find one, or have one made? Trek's only "solution" was to buy a new fork...
Attachments
trek 15mm fork adapter.png

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