Dirt Rag Magazine

Borealis releases second fat bike model, equipped with RockShox fat bike suspension fork


It’s two big announcements in one: First up, Borealis, the Colorado-based company that blew everyone away with a 21-pound fat bike last year, is set to release its new model, the Echo this weekend at Sea Otter. And as Steve Jobs would say, “there’s one more thing”—it will be available with the brand new RockShox Bluto fat bike suspension fork.

Get more details here.


Review: 616 Fabrications fat frame complete


In the varied and ever-changing garden of bicycles, it seems that the fat bike corner is the latest area of flourishing growth, producing new ideas and iterations at a rapid pace. Two longtime mountain bike innovators—Aaron Joppe, former owner of Slingshot, and John Muenzenmeyer, former owner of Nukeproof—have been drawn into this bloom and are making interesting contributions with their relatively new company, 616 Fabrication.

The company name comes from the area code of western Michigan where they manufacture frames, forks and hubs at their own facility. They offer frames for fat bike, cyclocross and mountain builds, all made in high-end steel. Artistic touches, such as laser-cut seatstay bridges and custom-etched ID plates, further set these creations apart from the average mass-produced models, as does a classic paint job.

The first thing I and other staffers noticed about the Fat frame is its relatively steep 72 head tube angle. It also sports short-for-a-fat-bike 17.5-inch chainstays. Hub spacing is 135mm front and 170mm rear. It’s designed to ride light and nimbly over sand, snow and rock. Custom geometry is available to suit anyone’s taste, but for our tight turns and four seasons, the stock numbers suited me just fine.

Read our full review of the 616 Fat.


45NRTH expands Dillinger tire to 5 inches of studded traction


45NRTH’s Dillinger tires have been a big hit with anyone looking for more traction than what the big rubber can give on its own. Now available in a 5-inch size, the new Dillinger 5 has a 120dpi bead and 45NRTH‘s new two-piece concave stud design that actually sharpens as it wears.

The tread pattern is slightly revised from the still available Dillinger 4 (26×4.0) and like it’s “smaller” sibling, will be available in a studdless version as well. Ultimate traction doesn’t come cheap though: The studded version will sell for $250, studless for $175.


BREAKING: Surly debuts new fat bike, the Ice Cream Truck. New Karate Monkey coming too?

News today from Frostbike and our friends over at Fat-bike.com: Surly is introducing a new fat bike dubbed the Ice Cream Truck. The steel frame (‘natch) is built around a symmetric 190mm rear hub spacing to clear the largest of tires. The rear dropout is the same convertible unit seen on the Instigator 2.0 that can run a QR, thru-axle or singlespeed. The bottom bracket shell is 100mm press fit.

More details to come. Guess this blog post from Surly back in January was a pretty good tease.


Surly also posted this on its blog today, alluding to an all-new Karate Monkey. Stay tuned.


‘The Push’ – a short film from Salsa Cycles

The Arrowhead Ultra 135, the coldest bike race in the Lower 48, begins one week from today in International Falls, Minnesota. Traversing the 135-mile Arrowhead Trail, it promises promises near-Arctic conditions and nearly always delivers. To finish, let alone win, is a triumph of man and machine over nature. Salsa Cycles‘ Mike “Kid” Riemer has put together this wonderful tribute to an event that is close to his heart.


Feature film: ‘A Thin White Line’

Think you’re tough for riding through the winter? Check out this documentary about the 2001 Iditasport adventure race along the Iditarod Trail on foot, ski or bike. Covering up to 1,100 miles across Alaska in the winter could be life-changing or deadly, depending on how it goes. Watch for endurance race legend Mike Curiak on what appears to be an early version of a home-grown fat bike. I’m sure the bikes ridden these days look a lot different!

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