M12x1 142-148-Spacer

Thru Axle


Burley’s official adapter for bikes with a 12mm thru axle. Stock thru axles are not able to accommodate any sort of axle mounted hitch system. The Burley Thru Axle is a requirement for any axle mounted hitch system with a bike that has a 12mm thru axle. Our new Thru Axles have an external male threading on the end to accommodate the installation of our axle mounted hitch system.

Thru Axle Fit Guide: Download Here

SKU: N/A Categories: ,

At Burley, we want to make sure that everybody has the opportunity to take a trailer with them on every adventure. The Burley Thru Axle is our solution to bikes equipped with a 12mm thru axle. Male threading on the end allows a hitch to be attached, and any Burley trailer can then be used with a thru axle bike.


  • Official Burley adapter for bikes with 12mm thru axles
  • External male threading to accommodate the installation of our axle mounted hitch system
  • Quick and easy one-time installation


Available sizes of the Thru Axle include:

  • 12 x 1.0, 142-148mm
  • 12 x 1.5, 142-148mm
  • 12 x 1.75, 142-148mm
  • 12 x 1.75, 197mm
  • 12 x 1.5, 197mm

If you are unsure of the correct thread pitch or hub length, please consult with the manufacturer of your bike, or your local bike shop before purchasing a Burley Thru Axle.

Additional Information

Thru Axle Specs

12 x 1.0, 142 – 148mm, 12 x 1.5, 142 – 148mm, 12 x 1.75, 142 – 148mm, 12 x 1.75, 197mm, 12 x 1.5, 197mm

Thru Axle is rated 4.3 out of 5 by 7.
Rated 5 out of 5 by from Great Axle The thru axle fit perfectly and I was super appreciative of the printable page to pick the right length and thread choice. FYI, luckily I checked my printed page to a real ruler and realized I needed to print the page larger than 100% to have the scale accurate. I thought the price on axle too steep, but little choice
Date published: 2017-11-27
Rated 3 out of 5 by from As described -- but pretty pricey Bought this to put a trailer hitch on my Trek Farley. The diagram on the website was very helpful to pick out the right length and thread pitch. Installed perfectly. Only complaint is that it seems quite pricey for what is basically a long bolt.
Date published: 2018-06-21
Rated 2 out of 5 by from Does not work on Tern GSD's Unfortunately, this item did not work on my bike and had to order one from Robert Axle Project to allow me to attach a trailer to my bike.
Date published: 2018-10-25
Rated 5 out of 5 by from Works like a champ The throu axel works just like advertised and was very easy to install even for our new Trek electric bike.
Date published: 2019-01-05
Rated 5 out of 5 by from Works as it should Had a little trouble figuring out which thread size to buy. Works as it should. Pricey.
Date published: 2017-10-10
Rated 5 out of 5 by from Works great on my Ibis Mojo HD My HD has a 142x12 thru axle and this worked like a charm.
Date published: 2017-10-30
Rated 5 out of 5 by from perfect Well designed and fits perfectly, great customer service
Date published: 2018-12-20
  • y_2019, m_1, d_16, h_24
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.9
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_7
  • loc_en_US, sid_16242, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_burley
  • bvseo_sdk, p_sdk, 3.2.0
  • CLOUD, getContent, 23.05ms