New axle options enable fat bikes to attach trailers

The Robert Axle Project gives more versatility to fat-tyred rides

The Robert Axle Project has introduced of a range of aftermarket fat bike axles that will allow riders to attach trailers to thru-axle equipped fat bikes. These new axles will join the company's pre-existing 142 x 12mm axle options.

These replacement fat bike axles are compatible with BOB trailers and hitch-mount style trailers such as Thule, Chariot and Burley child and cargo carriers. All the popular fat bikes models – such as the Salsa Beargrease, Borealis and Trek Farley – are catered for, with four new thru-axle models to suit 12x177 and 12x197 hub standards, with either 1.5 or 1.75mm dropout thread pitches.

With four new axle models on offer, many newe thru-axle equipped fat bikes are catered for: with four new axle models on offer, many newe thru-axle equipped fat bikes are catered for
With four new axle models on offer, many newe thru-axle equipped fat bikes are catered for: with four new axle models on offer, many newe thru-axle equipped fat bikes are catered for

All axles are made in Bend, Oregon, USA from a hard anodised 7075 aluminium and stainless steel ends (non fat bike axles pictured)

The Robert Axle fat bike axle was first debuted at Interbike 2014 on the Felt Outfitter bike, an electric fat bike built for hunting, fishing and camping.

Chris Kratsch, president of the Robert Axle Project, said: “The fat bike revolution will allow more people to access more backcountry, all year round. And now, even more functionality is added with the Robert Axles. Dads have the opportunity to bring their kids in a hitch mount trailer, or backcountry hunters can haul their kill out with a BOB trailer.”

Made in the usa from 7075 aluminium with stainless steel ends, these axles should prove plenty durable : made in the usa from 7075 aluminium with stainless steel ends, these axles should prove plenty durable
Made in the usa from 7075 aluminium with stainless steel ends, these axles should prove plenty durable : made in the usa from 7075 aluminium with stainless steel ends, these axles should prove plenty durable

The axle is installed or removed with an Allen key

Mountain bike Robert Axles retail for US$56 to US$62. Fat bike axles are a little more expensive, at US$63 to US$69 (UK and Australia pricing is currently unavailable).

The Robert Axle website offers a guide to help you find the right replacement axle for your bike.

David Rome

Editor, Australia
Having worked full-time within the cycling industry since 2006, Dave is a former editor of BikeRadar Australia. Riding and racing mountain, road and 'cross for over a decade, Dave's passion lies in the sport's technical aspects, and his tool collection is a true sign of that.
  • Discipline: Mountain, road and cyclocross
  • Preferred Terrain: Fast and flowing singletrack with the occasional air is the dream. Also happy chasing tarmac bends.
  • Current Bikes: Trek Fuel EX 27.5, SwiftCarbon Detritovore, Salsa Chilli Con Crosso
  • Dream Bike: Custom Independent Fabrications titanium, SRAM Etap and Enve wheels/cockpit
  • Beer of Choice: Gin & tonic
  • Location: Sydney, Australia

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