Fat Bikes

From Singletrack to Snow—One Bike Rules It All Full carbon frame with a svelte top tube and stay shaping for long rides and epic adventure comfort. The LES Fat features a tailored carbon lay-up for each size ensuring optimal ride characteristics for all rider profiles. VERIFIED VERSATILITY The LES Fat fits all fat and plus wheel sizes, via the patented Swinger II dropout system, without compromises to the bike's geometry. The Swinger II dropout system also allows for ease of switching between a geared and single speed set up. EASY ON THE KNEES The LES Fat features a kind-to-your-knees narrow Q-factor design. With a minimum Q-factor of 210mm, this is similar to the Q-factor on bikes designed for the narrower 170mm rear hub spacing. ENGINEERED FOR THE INDIVIDUAL Our engineers know a bike's set-up is subjective, so for the LES Fat they made it possible to swap the suspension, wheel size and drivetrain to the rider's preference. Ensuring the perfect set-up for ample saddle time. PRODUCT DETAILS - Get everything you need to know about the Les Fat. - Fits all fat/plus wheel sizes (26" X 3.8-5.0", 27.5" X 3.8-4.5", 27.5+, 29" and 29+) via Swinger II dropout system, without geometry compromises - New 27.5" Fat and 27.5+ wheel and tire spec - Full carbon frame features svelte top tube and stay shaping for long ride and epic adventure comfort - Adjustable chainstay length - Kind-to-your-knees, narrow Q-factor design - 2x, 1x and singlespeed compatible - 197mm rear spacing and optimized design clears 5" tires with massive clearance for snow, mud and sand - Pivot-designed carbon fork with 150mm spacing. Suspension fork compatible - Integrated rear rack mounts - Three water-bottle mounts - 10-year warranty

Since 2013, Borealis has specialized in lightweight carbon fiber fat bikes. The Crestone is our tried and true flagship model. Its frame geometry is optimized for riding in snow and sand with clearance for up to 5” wide tires. Paired with the most technically advanced components in the industry, the Crestone sets the standard for premium quality carbon fiber fat bikes. HIGHLIGHTS: Standard features include: SRAM Eagle NX 12-Speed drivetrain, SRAM Level T brakes, rigid carbon fork, carbon handlebars, carbon seat post, durable Sun Ringle Mulefüt rims and your choice of tires. Frame geometry provides responsive handling, offering maximum control for varying conditions in snow or sand. Tire clearance up to 26x5” and 27.5x4.5”. Compatibility for 100-120mm of suspension travel for more technical riding. Lightweight, durable carbon fiber frame comes with internally routed cables, 2-3 bottle cage mounts and lizard skin protectors on both the down tube and drive-side chain stay. COMPATIBILITY: Rockshox Bluto Fork tire size limitations: 26x5” or 27.5x4” Mastodon Pro EXT Fork tire size limitations: 26x5” or 27.5x4.5” Borealis Rigid Carbon Fork tire size limitations: 26x5” or 27.5x4.5” Dually 29x45 and 27.5x45 Rims – Max tire width: 3” All rims 65mm to 85mm wide are compatible with tire widths of 3.8” to 5” HED Carbon 100mm Rims – Max tire width of 4.6”

**If shipping the bike you will be contacted with exact shipping charges before the item ships. Shipping charges in cart are an estimate only. It'll take way more than hell freezing over to stop the Blizzard. With massive tire real-estate and mega clearance, snow's no issue for the Blizzard. Don't mistake it for a fat-tired gimmick—aggressive trail geometry and a no-nonsense mountain bike ride character differentiates it from the bandwagoners. The result? Send trail and rip commutes as aggressively and shredly as you want. Winter's here. Ice to see you. - All new Smoothwall Carbon frame and fork - Trail geometry for playing in soft conditions - High performance tires: it's all about the rubber with fat bikes! - Reliable, rebuildable, service supported rear hub for high torque fatbiking - Thru axles front and rear - Mounts for multiple bottle, racks, tools and more

Why follow tracks when you can make your own? Experience the "Foot out, flat out" fun of fat biking in any seasons. Whether you're tackling fresh snow pack or drifty sand dunes for days, the new Yukon will keep you rallying your favorite terrain in a whole new way.

Ice Cream Truck solves the problem of having to choose between a fat bike and a trail bike. It boasts a symmetric 190mm-spaced Chromoly frame, suspension-corrected 150mm-spaced fork, and sporty trail-oriented geometry. Supported by massive 4.8-inch tires, it's ready to deftly tackle nearly any terrain. - 100% Surly Chromoly steel with 44mm headtube and internal dropper post cable routing - Frame is E.D. Coated for increased life expectancy - 1-1/8-inch straight steerer fork, Chromoly steel - 100mm threaded bottom bracket shell - Front and rear thru-axles, non-offset

With premium frame quality and only the best components, the Borealis Flume offers the best value on the market. This expedition-ready fatty mirrors the Crestone geometry, but does so in lightweight, 6000-series aluminum. Up mountains, down glaciers, and across deserts - the Flume is ready for action. There are all kinds of alloy fat bikes on the market, but none with the Flume’s purebred heritage and durability. HIGHLIGHTS Standard features include: SRAM Eagle NX 12-Speed drivetrain, SRAM Level T brakes, rigid carbon fork, carbon handlebars, carbon seat post, durable Sun Ringle Mulefüt rims and your choice of tires. Frame geometry provides responsive handling, offering maximum control for varying conditions in snow or sand. Tire clearance up to 26x5” and 27.5x4.5”. Compatibility for 100-120mm of suspension travel for increased comfort and control. Lightweight, 6000-series aluminum frame comes with 2-3 bottle cage mounts, rear rack mounts on seat stays and Lizard Skin protectors on both the down tube and drive-side chain stay. COMPATIBILITY Rockshox Bluto Fork tire size limitations: 26x5” or 27.5x4” Mastodon Pro EXT Fork tire size limitations: 26x5” or 27.5x4.5” Borealis Rigid Carbon Fork tire size limitations: 26x5” or 27.5x4.5” Dually 29x45 and 27.5x45 Rims – Max tire width: 3” All rims 65mm to 85mm wide are compatible with tire widths of 3.8” to 5” HED Carbon 100mm Rims – Max tire width of 4.8”

Why follow tracks when you can make your own? Experience the "Foot out, flat out" fun of fat biking in any seasons. Whether you're tackling fresh snow pack or drifty sand dunes for days, the new Yukon will keep you rallying your favorite terrain in a whole new way.

**If shipping the bike you will be contacted with exact shipping charges before the item ships. Shipping charges in cart are an estimate only. It'll take way more than hell freezing over to stop the Blizzard. With massive tire real-estate and mega clearance, snow's no issue for the Blizzard. Don't mistake it for a fat-tired gimmick—aggressive trail geometry and a no-nonsense mountain bike ride character differentiates it from the bandwagoners. The result? Send trail and rip commutes as aggressively and shredly as you want. Winter's here. Ice to see you. - Updated 6061 Alloy frame - Trail geometry for playing in soft conditions - Lightweight rigid fork - High performance tires: it's all about the rubber with fat bikes! - Reliable, rebuildable, service supported rear hub for high torque fatbiking - Thru axles front and rear - Mounts for multiple bottle, racks, tools and more

The All-Around Fat 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 tire trail 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. - 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 Specs: - Rear Dropout Configuration: Horizontal slotted with optional vertical dumpout - Rear Hub Spacing: 12 x 177mm (Surly axle included); 10 x 170mm with Surly 10/12 Adapter Washers (not included) - Front Hub Spacing: 15 x 150mm (Surly axle included) - Rear Brake: Disc - 51mm I.S. (203mm max rotor) - Front Brake: Disc - 51mm I.S. (203mm max rotor) - Head Tube: Ø44mm - Steerer Tube: Ø28.6mm (1-1/8") - Crown Race: Ø30mm (1-1/8") - Stock Headset Upper (S.H.I.S.): ZS44/28.6 - Stock Headset Lower (S.H.I.S.): EC44/30 - Front Derailleur (Clamp): High direct mount top-pull (Ø34.9mm) - Max Chainring (CL): 1x (Fat bike 170): 34T; 2x (Fat bike 170): 26/38T; 2x (Surly OD): 22/36T - Tire Clearance Frame: 26 x 4.3" (rear axle position); 26 x 3.8" (front axle position); 29 x 3.0" - Tire Clearance Fork: 26 x 5.25"; 29 x 3.0" - Rigid Fork Spec: 468 x 47mm - Max Suspension Fork Length: 511 x 51mm (Fatbike 100mm) - Bottle Mounts Frame: 2 Standard (XS - M); 3 Standard (L - XL) - Bottle Mounts Fork: 2 Three-Pack - Rack Mounts Frame: Yes (upper and lower threaded) - Rack Mounts Fork: Yes (upper, lower, and mid-blade threaded) - Fender Mounts Frame: Yes - Other Features: Internal dropper post routing compatible

Have it both ways! Our Borealis Flume bikes come dirt-ready with 27.5 X 3" plus tires and Bluto suspension forks. As a bonus, these are fully fat-compatible and ready for winter with the addition of a fatbike wheelset. With premium frame quality and only the best components, the Borealis Flume offers the best value on the market. This expedition-ready MTB mirrors the Crestone geometry, but does so in lightweight, 6000-series aluminum. Up mountains, down glaciers, and across deserts - the Flume is ready for action. There are all kinds of alloy bikes on the market, but none with Flume’s purebred heritage and durability. HIGHLIGHTS Traditional fatbike bike geometry is both responsive and nimble for variable conditions in snow or sand. Standard features include Eagle NX 12-Speed drivetrain, Rock Shox Bluto Fat Bike Fork. carbon handlebars, carbon seat post and durable Velocity 27.5 rims with dirt-gripping Schwalbe Nobby Nic 3" tires. New Moon offers HED alloy and carbon fatbike wheelsets to upgrade a summer-ready Flume demo starting around $1700. Contact us for more info.

**If shipping the bike you will be contacted with exact shipping charges before the item ships. Shipping charges in cart are an estimate only. It'll take way more than hell freezing over to stop the Blizzard. With massive tire real-estate and mega clearance, snow's no issue for the Blizzard. Don't mistake it for a fat-tired gimmick—aggressive trail geometry and a no-nonsense mountain bike ride character differentiates it from the bandwagoners. The result? Send trail and rip commutes as aggressively and shredly as you want. Winter's here. Ice to see you. - Updated 6061 Alloy frame - Trail geometry for playing in soft conditions - Lightweight rigid fork - High performance tires: it's all about the rubber with fat bikes! - Reliable, rebuildable, service supported rear hub for high torque fatbiking - Thru axles front and rear - Mounts for multiple bottle, racks, tools and more

With premium frame quality and only the best components, the Borealis Flume offers the best value on the market. This expedition-ready fatty mirrors the Crestone geometry, but does so in lightweight, 6000-series aluminum. Up mountains, down glaciers, and across deserts - the Flume is ready for action. There are all kinds of alloy fat bikes on the market, but none with the Flume’s purebred heritage and durability. HIGHLIGHTS Standard features include: SRAM Eagle NX 12-Speed drivetrain, SRAM Level T brakes, Mastodon Pro Ext. fork, carbon handlebars, carbon seat post, durable 26" Sun Ringle Mulefüt rims and 4.8" Schwalbe Jumbo Jim Tires for max snow flotation. Frame geometry provides responsive handling, offering maximum control for varying conditions in snow or sand. Tire clearance up to 26x5” and 27.5x4.5”. Lightweight, 6000-series aluminum frame comes with 2-3 bottle cage mounts, rear rack mounts on seat stays and Lizard Skin protectors on both the down tube and drive-side chain stay.

With premium frame quality and only the best components, the Borealis Flume offers the best value on the market. This expedition-ready fatty mirrors the Crestone geometry, but does so in lightweight, 6000-series aluminum. Up mountains, down glaciers, and across deserts - the Flume is ready for action. There are all kinds of alloy fat bikes on the market, but none with the Flume’s purebred heritage and durability. HIGHLIGHTS Standard features include: SRAM Eagle NX 12-Speed drivetrain, SRAM Level T brakes, rigid carbon fork, carbon handlebars, carbon seat post, durable 26" Sun Ringle Mulefüt rims and 4.8" Schwalbe Jumbo Jim Tires for max snow flotation. Frame geometry provides responsive handling, offering maximum control for varying conditions in snow or sand. Tire clearance up to 26x5” and 27.5x4.5”. Lightweight, 6000-series aluminum frame comes with 2-3 bottle cage mounts, rear rack mounts on seat stays and Lizard Skin protectors on both the down tube and drive-side chain stay.

Have it both ways! Our Borealis Flume summer demo bikes come dirt-ready with 27.5 X 3" plus tires and Bluto suspension forks. As a bonus, these are fully fat-compatible and ready for winter with the addition of a fatbike wheelset. With premium frame quality and only the best components, the Borealis Flume offers the best value on the market. This expedition-ready MTB mirrors the Crestone geometry, but does so in lightweight, 6000-series aluminum. Up mountains, down glaciers, and across deserts - the Flume is ready for action. There are all kinds of alloy bikes on the market, but none with Flume’s purebred heritage and durability. HIGHLIGHTS Traditional fat bike bike geometry is both responsive and nimble for variable conditions in snow or sand. Standard features include Eagle NX 12-Speed drivetrain, Rock Shox Bluto Fat Bike Fork. carbon handlebars, carbon seat post and durable Velocity 27.5 rims with dirt-gripping Schwalbe Nobby Nic 3" tires. Note: these demos DO NOT include snow-ready wheels and tires. New Moon offers HED alloy and carbon fat bike wheelsets to upgrade a summer-ready Flume demo starting around $1700. Contact us for more info.

**If shipping the bike you will be contacted with exact shipping charges before the item ships. Shipping charges in cart are an estimate only. It'll take way more than hell freezing over to stop the Blizzard. With massive tire real-estate and mega clearance, snow's no issue for the Blizzard. Don't mistake it for a fat-tired gimmick—aggressive trail geometry and a no-nonsense mountain bike ride character differentiates it from the bandwagoners. The result? Send trail and rip commutes as aggressively and shredly as you want. Winter's here. Ice to see you. - Updated 6061 Alloy frame - Trail geometry for playing in soft conditions - Lightweight rigid fork - High performance tires: it's all about the rubber with fat bikes! - Reliable, rebuildable, service supported rear hub for high torque fatbiking - Thru axles front and rear - Mounts for multiple bottle, racks, tools and more