Convert 20mm hub to 15mm?

njonesy_07 · May 19, 2012

Hello All,

Right now I am running Bontrager "Big Earl" wheel set which has a 20mm thru hub. I'm considering a new fork that would only come in 15mm thru axle. So my question is can I get 15mm caps to convert my Big Earl hub to fit the new fork?

Perhaps I should just consider a whole different wheelset? Any suggestions welcome.

whoda*huck · May 19, 2012

Contact Bontrager. Most newer hubs have interchangeable cones.

fatcat · May 19, 2012

Azonic 15mm Hub Axle Adaptor at Price Point

Hope Front Hub Converters 20mm To 15mm at Price Point

these MAY work I would contact Azonic, Hope looks and makes sense tho

b-kul · May 19, 2012

i think bonty hubs are just rebadged dt swiss so there is a good chance a kit like that is available.

shiggy · May 20, 2012

njonesy_07 said:
Hello All,

Right now I am running Bontrager "Big Earl" wheel set which has a 20mm thru hub. I'm considering a new fork that would only come in 15mm thru axle. So my question is can I get 15mm caps to convert my Big Earl hub to fit the new fork?

Perhaps I should just consider a whole different wheelset? Any suggestions welcome.

There are no universal conversion parts. Too much variation in hub designs.

Would not bet that the Big Earl is a DT

mhickey79 · May 20, 2012

b-kul said:
i think bonty hubs are just rebadged dt swiss so there is a good chance a kit like that is available.

Just some of the higher end Race Lite and Race X Lite hubs. And that may just be the older ones.

laksboy · Nov 12, 2015

Old thread. Just found this item which appears to let you use a 15mm fork on a 20mm hub'd wheel... Any thoughts?
MTB Tools Mountain Bike 20mm Thru Axle to 15mm Thru Axle Adapter for 110mm Fork

Acme54321 · Nov 12, 2015

20mm hubs/forks have 110mm drop to drop spacing. 15mm hubs/forks have 100mm spacing. The only way that would work is if your 15mm axled fork had 110mm spacing (which is on its way into the market along with boost 148).

laksboy · Nov 13, 2015

Yes. It appears that the product is designed for the available Boost 110 forks.

My problem is I have bikes with 20mm thru-axles and 1-1/8 straight steer tubes. This combo is quickly becoming rare.

Acme54321 · Nov 13, 2015

Pretty much any decent front these days will work with 15mm or 20mm axles

bigfoot_mt · Oct 26, 2016

Yes MTBTools adapter works great.

I thought I would have to get a new wheel if I upgraded from my old 20x110 fork. Just installed my adapter on the wheel and it mounted perfectly on the 15x110 Rock Shox Yari fork.
2 things to keep in mind. This fork is Boost width at 110mm. Also, it is a Rock Shox fork with torque cap compatibility so there is plenty of space for the bigger caps on the wheel.
MTBTools says he has a 100mm option, but it seems like this would only work if your wheel is 20x100. Also, not sure how it works on a fork without the torque cap feature.
However, I am stoked to have an upgraded fork without having to pay for a new wheel!

Convert 20mm hub to 15mm?

njonesy_07

whoda*huck

fatcat

b-kul

shiggy

mhickey79

laksboy

Acme54321

laksboy

Acme54321

bigfoot_mt

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