Fat Bikes & Fat Parts
Looking for a fat bike without all the fat? Lightweight construction and nimble OutFront geometry make the Fat CAAD so agile and quick, you'll want to ride it all year long. The 100mm-travel Lefty Olaf fork is more than stiff enough to tell that big tire what to do, while the slack head angle and long front center lets you get rowdy on the steeps. The tight trail measurement keeps things crazy-nimble at slow speeds so you get the most out of that big, fat contact patch. Thanks to Cannondale's System Integrated cranks and offset chainrings, the FAT CAAD's Q-factor is up to 2.5cm narrower than the competition, so it feels like riding a bike, not a horse. The System Integrated crankset and offset Ai offset chainring also balance the short stays and allow for 2x compatibility with up to 4.8" tires!
The Big Fat Dummy is a long tail cargo bike that took a few too many doses of growth hormones. At first glance, you might say that Surly just put bigger tires on a Big Dummy. But if you said that, you'd actually be very wrong so just… don't. Think of Big Fat Dummy as more of a second or third cousin to Big Dummy rather than a brother. They share some of the same DNA and look sort of similar, but they're two very different bikes and really only interact when they both reach for the potato salad spoon at that family reunion that no one really wants to be at anyway. Now that that's out of the way, let's get down to the nitty gritty of what makes this hulking beast of a bike tick. Surly's goal with designing a cargo bike around fat tires was to create the most stable, stiff, and traction-laden ride possible while hauling a ton of stuff. Big Fat Dummy has a longer toptube and slacker headtube than its more svelt cousin giving it a nice, predictable, and stable ride. They also used thinner, lighter tubing to construct its cargo area so while it's an overall burlier bike, there's not much difference in weight. Big Fat Dummy accepts either 10mm or 12mm axles in the rear with a spacing of 190/197mm. That big ol' spacing equates to one thing: tire clearance for days. Big Fat Dummy maxes out at a massive 26 x 5.25" tire.* While that large of a tire provides the most traction and stability a bike can possibly offer, it's also a lot of rubber to push and might not be for everybody. Luckily, Big Fat Dummy is also a blast to ride with 3" tires too. It uses the same 100mm suspension-corrected fork as the Wednesday, meaning if you want to add a little squishy squishy to your ride, you can throw a Bluto on and let ‘er rip. If you intend to carry a passenger on your Big Fat Dummy, Surly requires use of their Dummy Rail Collars. These provide a secondary retention system for the rack, as well as stiffen the rack system. In addition, a stoker handlebar set up, found on tandem bicycles, is recommended as well. Make sure to check with seat post manufacturer for stoker handlebar compatibility. All Big Fat Dummy framesets and bikes ship with a Dummy deck, rails, bags, and the aforementioned Dummy Rail Collars so you can immediately start hauling cargo — human or otherwise. Big Fat Dummy is ready and willing to carry all sorts of crap — literally. It's already in use on an organic farm in Ecuador so it's likely that it's hauled some form of manure by now. *Using a 26 x 5.25" tire will cause some drivetrain limitations.
Cannondale’s aluminum wizardry and System Integration create a fat bike with the heart and soul of a racer. OutFront steering geometry lets you get the most out of that big, fat contact patch. Slack head angle and long front center lets you get rowdy on the steeps, while the tight trail measurement keeps things crazy-nimble at slow speeds. Thanks to our System Integrated cranks and offset chainrings, the FAT CAAD's Q-factor is up to 2.5cm narrower than the competition, so it feels like riding a bike, not a horse. Fat CAAD's System Integrated cranksets feature an Ai offset chainring to offer the best balance of short stays, tight Q-factor and 2x compatibility, with full 4.8-inch tires. - SmartForm C1 aluminum frame with Cannondale Fatty rigid fork - Sun Ringle Mulefut 80 SL rims with Maxxis Minion FBF tires - 11-speed Shimano SLX components - Tektro hydraulic disc brakes
Ice Cream Truck is the bike we reach for when we don’t really know what the trail has in store. From log and root-covered ribbons of twisty singletrack to miles of powdery snow or sandy beaches, Ice Cream Truck can handle it all. Hell, you could probably even hop over a grizzly if the situation arises. Probably. While we could certainly throw out terms like "confidence-inspiring" and "traction-laden" to describe Ice Cream Truck, those phrases are mostly garbage, so we’re not going to do that. We’re not here to inspire you, and we didn’t laden it with anything. What we did do was design a monolith of a trail bike that doesn’t care what’s in front of it. - Long toptube, short seatstays, and a 68-degree headtube angle makes it tight and maneuverable on fast, technical terrain - Modern trail bike standards like stealth dropper post routing, 44mm headtube, and thru-axles - Clearance for a full 26 x 5 tire on 100mm rims
The Surly Pugsley may be the original fat bike, but this one is far from the original. Previously a great all-around fat bike, the Pugsley has been redesigned to be an ideal off-road touring and exploration rig. Surly lengthened the chainstays 12mm for stability when loaded and so your heels float effortlessly past panniers. The tweaked rear rack mounts on the dropouts let you center your rack over the wheel, despite the offset rear triangle. Those dropouts will take a 142x12mm thru axle if that's your schtick, but this rig comes with a 135mm QR hub, snug as a bug with a pair of adapter washers. Pugsley brings back the 135mm-spaced offset fork, so you can run a front wheel with a spare cog or freewheel as a bail-out option to swap with the rear if your internally-geared hub freezes up in neutral or you smash your derailleur having too much fun. A plethora of three-pack mounts give you gear-hauling options aplenty, and a Surly Moloko Bar gives your hands damn near as many options as well, so they stay clappably happy even on your longest, story-generating adventures.
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Looking for a fat bike without all the fat? Lightweight construction and nimble OutFront geometry make the Fat CAAD so agile and quick, you'll want to ride it all year long. The slack head angle and long front center lets you get rowdy on the steeps, while the tight trail measurement keeps things crazy-nimble at slow speeds so you get the most out of that big, fat contact patch. Thanks to Cannondale's System Integrated cranks and offset chainrings, the FAT CAAD's Q-factor is up to 2.5cm narrower than the competition, so it feels like riding a bike, not a horse. The System Integrated crankset and offset Ai offset chainring also balance the short stays and allow for 2x compatibility with up to 4.8" tires!
Wednesday is a great all-around fat bike that has the soul of a trail bike and mind of a touring bike. Wednesday sits in the middle of our Trail category, but don’t let that fool you into thinking that’s its only use. With Wednesday, we borrowed elements from some of our Trail and Touring models to create a versatile fat bike that can truly handle anything you want to attempt. If you do an equal amount of off-road touring as you do hitting trails, Wednesday’s ability to play both parts equally will suit you well. Or, if you’re looking for a fat bike and don’t need the fattest tires on the market, Wednesday’s 26 x 4.6" tire clearance is just the ticket. Any day of the week’s a great day to ride a Wednesday. - Modern mountain standards: stealth dropper post routing, 44mm headtube, suspension correction, front and rear thru-axles - Full suite of useful braze-ons: front and rear racks, multiple sets of three-pack mounts, fenders - Full-forward, short chainstay position: 26 x 3.8 tires on 80mm rims; full-rearward, longer chainstay position: 26 x 4.6 tires on an 80mm rim
Bust out for an all-terrain exploration on the 4 Season fat bike. An alloy frame and fork keep it light and agile, while 26 x 4.8-inch tires enable unbelievable grip and flotation across any surface you encounter. A Shimano SLX 11-speed drivetrain and Shimano hydraulic disc brakes provide excellent gearing and stopping power, and KHS touch points keep cost low and stoke high.
With the confidence-inspiring traction and flotation 4-inch wide tires provide, you'll pedal up, over, and through just about anything that comes your way on the 4 Season 500 fat bike. It's built with a lightweight aluminum frame and rigid alloy fork for optimum power transfer and features Shimano hydraulic disc brakes for ultimate control in the muck you're bound to find. A Shimano 10-speed drivetrain keeps you moving with ample gearing, and full-length external cable housing means better shifting in snowy, muddy, and sloppy conditions.
Surly's Ice Cream Truck turns up the volume on fat. With unmatched traction and float courtesy of super wide tires (up to 4.8-inches wide!), and the flickable geometry of your favorite trail bike, this fatty feels frisky, limber, and ready for action. The symmetrically spaced 190mm rear end uses Surly's Modular Dropout system for an array of rear axles choices. 197mm thru-axle? 190mm geared? Singlespeed? All equally plausible possibilities with the Ice Cream Truck. A 44mm headtube provides fork options, and the frameset ships with a suspension-corrected, 150mm fork with a 15mm thru-axle. Surly's proprietary 4130 chromoly steel and corrosion-fighting ED coating add a hefty dose of tough to this bike. Now, where do you want to ride your Ice Cream Truck?
Scott's Big Jon puts some extra swagger in your trail game. Here's a whole new level of fatness, with a light, nimble aluminum frame matched to a rigid aluminum Scott fork. In addition to that frameset, the wheels are where the action is, with a pair of 80mm Syncros rims swathed in 4.8-inch wide Schwalbe Jumbo Jim tires that float over snow, sand, and loose, technical terrain. Climbing big hills and mastering bigger descents is a snap thanks to the Shimano XT/Deore drivetrain and E-thirteen cranks. And, when things start to get a little too zesty, Shimano hydraulic brakes are right there to help keep everything under control. Sleek Syncros components and saddle finish off the Big Ed, with style and reliability to spare.
If you ever looked at miles of mostly unrideable landscape and thought "hmmm, I wish I could ride over that" then Surly's Moonlander might be your perfect bike. The chromoly frame was built around humongously wide rims and tires (we're talking 4.7-inches wide here!) meant to roll over dang near any obstacle. The flotation and traction gained by using monster volume, low-pressure tires can get you over and through otherwise sink-up-to-the-hubs terrain: ice, snow, sand, mud, wet rocks and roots. Plus, the matching chromoly fork is designed for a rear hub so just in case your rear freewheel blows up in the backcountry, you have spare to keep you rolling.
Surly's Pug Ops takes the term "all terrain bicycle" to a new, fantastically fun level. The Pug Ops was created to go where normal mountain bikes flounder, and use even bigger tires and rims than the standard Pugsley. The flotation and traction gained by using large-volume, low-pressure tires can get you over and through otherwise unrideable terrain: ice, snow, sand, mud, wet rocks and roots. The drivetrain is ready for anything, too, with Shimano LX/SLX derailleurs, SLX shifters, and a burly Surly Offset Double crankset. And to help you master the most adverse conditions, you get tough Salsa components as well as Avid BB7 mechanical-disc brakes.
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