New Fat bike with two chainrings up front and twice the amount of gears. The Fatty Fat Bike features some of the most progressive 'fat' geometry out there. Since hitting the scene over a year ago we've evolved it further to meet the changing demands and advancements of the fat bike world. This new build has a 2x10 SRAM X5 set-up, increasing things two-fold. More gears, more fat, more fun.
For all terrain riding, whatever the conditions, whatever the weather, there can be but one option. Based around the huge 4" tyres and 70mm rims, the Fatty grips to surfaces that just aren't made for confident two wheeled riding. 6061 CNC'd aluminium hubs with a 135mm axle at the front, 170mm rear keep the Fatty rolling over anything you encounter. At 6-15 psi they soak up shocks like a suspension fork, and allow you to tune your ride through your tyre pressure.
We've kept the SRAM X5 groupset on it but doubled it up; two up front, ten at back. What this means is you have twice as many gears, and a lower climbing gear to tackle even more ground than before. You could say it's twice as good because of this, and you would be correct.
Why get Fat? Why not?! It's a totally new experience, trail capable and fun fun fun. Our chief 'fatty' tester Jon "Shaggy" Ross, rode the whole of the gruelling Trans Provence race route on his proto Fatty, solidly putting this genre on the map for trail capable handling. Four inches of bouncy rubber might be a world away from 150mm full suspension bikes, but it's like compared cheese and chocolate. Fat was good, now get fatter.
|Frame:||On-One Fatty Frame|
|Fork:||On-One Fatty Fork|
|Front Derailleur:||SRAM X5 Front Mech / 2x10 / 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|
|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|
|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 Seatpost Twelfty Sport MTB Seatpost- Black / 31.6mm|
|Pannier rack compatible:||No|
|Bottle cage bosses:||1 set|
|Number of Gears:||20|
|Weight:||34lb - 15.4 kg|
|A||Head Angle (°)||68||68||68|
|B||Head Tube Length (mm)||100||120||140|
|C||Effective Top Tube (mm)||570||595||610|
|D||Seat Angle (°)||73||73||73|
Seat Tube Length Centre to Top (inch)
|F||Chainstay Length (mm)||445||445||445|
|G||Standover Height (mm)||740||740||740|
|Rider Height||Inside Leg||Suggested Frame Size||Stem Length|
|5′6″ to 5′10″||28”-31”||16”||40-60mm|
|5′9″ to 6′1″||30”-34”||18”||40-60mm|
|6′10" to 6′3″||33”-36”||20”||40-60mm|
All frame size recommendations are approximate. A good fit will also depend on the correct choice of stem length, correct bike set-up for the rider and riding style.
Correct frame size choice can also depend on a rider’s torso and limb length.