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First Impressions: The On-One Fatty

I’ve been riding the On-One Fatty fatbike for a few weeks now, and I am ready to share some initial thoughts with you.

I also want to clarify something before we get started. We reached out to Planet X/On-One USA for this bike primarily to test for our sister site Mtnbikeriders.com after our experiences with fatbikes in Las Vegas last September. But, we thought, “why don’t we try this bike out as a commuter, too?” While we’ve long been advocates of the “you don’t need anything special to be a bike commuter” camp, there ARE times when the right tool for the job is something a bit off the beaten path. Fatbikes, as you can imagine, are definitely not a typical everyday commuter choice for the vast majority of us.

As I mentioned in my introduction, there was almost no snow on the ground when the bike was delivered. I didn’t have to wait long, though, as plenty more came only days later…and proceeded to pile up every couple of days thereafter.

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So far, it has been a lot of fun, but there’s also been a bit of a learning curve. Think of fatbikes as an overgrown mountain bike…but one capable of tackling terrain that may leave a regular MTB spinning its wheels. Riding a fatbike in hairy conditions isn’t always as easy as swinging a leg over and pedaling away, though, as I quickly learned.

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The On-One Fatty features an aluminum frame and a steel fork. I tested the 18″ frame (measured from the center of the bottom bracket to the top of the seat tube), and it fit just right (I’m about 5′ 9″). The frame is constructed with a doubled top tube and a low standover height, crucial for when you’ve got to stop in knee-deep snow. That doubled top tube and the overall construction means the Fatty is stiff from front to back; there was ZERO flex even when horsing this brute around in the white stuff.

The parts spec was fine for my purposes — nothing exotic, and everything worked just the way it was supposed to. Remember that we are testing a 1×10 drivetrain, and the newest version of the Fatty comes with a 2×10 for some extra hillclimbing gearing or bailout range if things get really ugly.

The Fatty did well when the snow was packed down or if it was a bit damp and heavy (snow in near-freezing conditions). It did tend to bog down in fresh, dry powder (well below freezing temps) or if the snow was saturated from melting. I asked my fatbike guru Chris Follmer for advice along the way, and he mentioned that generally, ALL fatbikes exhibit the same preferences for snow conditions. Some of that depends on tire tread and pressure, of course. I would like to try other tire patterns to see if some grip better in dry powder than the stock tires that come with the Fatty.

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I did play with pressure, though…going as low as 5 psi, but generally hovering right around 7 psi for the best balance of grip and rolling resistance. On slushy roads or soft, muddy ground, the Fatty sings right along. On dry pavement…well, you can imagine that low pressures mean a sluggish ride. On dry days, I cranked the pressure up around 15 psi to see how the ride was — while there was still a good bit of rolling resistance, I was able to knock out an 18 mile trail/road ride in short order and without too much extra effort. Even with the high pressure (relative to most fatbike uses), there’s a lot of natural suspension effect going on with the huge tire volume. Talk about smooth sailing!

Most fatbikes come with wide handlebars…I mean, REALLY W-I-D-E bars. The El Guapo Ancho bars that came on our test Fatty measure 820mm from end to end! Wide bars are needed to help keep the front end from wallowing out in soft conditions, allowing the rider to apply lots of “body english” as needed. Learning to relax my grip on the bars took me a few rides; at first, I was clenching them pretty tightly and wandering all over the place. Once I discovered that I could track better by relaxing, I started doing that…allowing me to stay in tire ruts made by cars, or packed-down areas on the trail.

Riding the Fatty has been like rolling along on a giant BMX bike — it encourages some horseplay and frolicking in the snow! I really enjoyed the solid lockup of the Avid Elixir hydraulic discs (yes, hydraulic — even in below-zero temps)…it made powerslides on ice an easy thing:

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And, like our friend Vince Rodarte told me, “the Fatty is a wheelie monster!” Oh, how right he was…a big, soft tire and low gearing made it a snap to pop serious wheelies:

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In our formal review in a few weeks, we’ll talk about commuting potential and the particulars of this bike’s running gear. In the meantime, if your commute requires traversing snow, deep sand, mud, or you simply like to take shortcuts over the rough stuff, a fatbike might be just what you’ve been waiting for.

On test: On One’s “Fatty”

We’ve given you a couple days to guess what was in the box that came in the mail last week. Here it is, the On One “Fatty” fat bike:

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The bike we received is from On One’s/Planet X’s test fleet — the bike has been ridden hard since last July by a variety of testers, so it shows some wear. The specs for the 2014 model are as follows:

Frame: On-One Fatty Frame
Fork: On-One Fatty Fork
Front Derailleur: SRAM X5 Front Mech / 2×10 / Max 38T / High Direct Mount / Dual Pull
Rear Derailleur: Sram X5 Rear Mech / 10 Speed / Black / Medium
Shifters: Sram X5 Trigger Shifter 10 Speed
Chainset: SRAM X5 Chainset
Crank length: 175 mm
Chainrings: 36-22T
Bottom Bracket: Truvativ Howitzer 100mm shell Bottom Bracket, Chainline: 66 mm
Cassette: SRAM PG 1030 Cassette / 10 Speed / 11-36T
Chain: SRAM PC1031 10 Speed 114 Link Chain
Front Brake: Avid DB3 Hydraulic Disk Brake / Front / 900mm / 20 Post To IS / Black
Brake Rotor Front Avid Clean Sweep G2CS, Size: 180 mm,
Rear Brake: Avid DB3 Hydraulic Disk Brake / Rear / 1400mm / 20 Post To IS / Black
Brake Rotor Rear Avid Clean Sweep G2CS, Size: 160 mm
Handlebars: El Guapo Ancho Handlebars, Width: 810mm, Black or White
Bar tape: N/A
Grips: On-One Half Bob Lock-On Grips / Clear
Stem: On-One Hot Box Stem 70,80,90,100 mm
Headset: On-One Smoothie Mixer Tapered Headset 1 1/8 inch – 1.5 inch
Wheels: On-One Fatty Wheelset
Front Tyre: On-One Floater Fat Tyre 4.0 inch, 120 TPI, Folding, Black
Rear Tyre: On-One Floater Fat Tyre 4.0 inch, 120 TPI, Folding, Black
Inner Tube: On-One 26″ Fatty Fatbike TubeWidth: 2.5-2.7″ Heavy Duty
Saddle: On-One Bignose Evo Saddle / CroMo Rail
Seatpost: On-One Twelfty MTB Seatpost – 31.6mm
Mudflap compatible: No
Pannier rack compatible: No
Pedals: Available Separately
Bottle cage bosses: 1 set
Number of Gears: 20
Weight: 34lb – 15.4 kg

The specs are a bit different on the bike we received to test — a SRAM 1×10 drivetrain with a single ring up front and a chainguide replacing the front derailleur being the big standouts. Also, the test bike has Avid Elixir 1 hydraulic brakes rather than the DB3s on the current spec sheet.

As you can see from the photograph above, the snow started melting the day this bike was delivered to my door. So, we’re going to have to wish for some additional snow before we can do a lot of testing.

This bike is a bit of a departure for us…it’s not exactly a typical “commuter bike”, and there may be more useful bikes/bike setups for winter riding than a fat bike. But, we wanted to see for ourselves what all the fat-tired hype is about and share our experiences with you. Perhaps a fat bike like the Fatty here really IS the “must get to work no matter what the weather” platform we’ve been looking for?

Stay tuned for updates and the review itself over the next few weeks. In the meantime, I’m going to be out getting filthy and putting a big ol’ smile on my face. Frozen slush, anyone?

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