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Planet X

Fat Bikes

Big Tyred Adventures


Utterly Delicious Fat Bike Fun

The Fat Bike category didn’t exist just a few years ago. Sure there were small wheeled bike with big tyres out there but there were one-off creations handbuilt for epic trips across the wilderness in the wildest of weather conditions. Since then it’s all changed. These bikes are designed to provide more smiles per mile than any other ones available!

Made for pure fun, Fat bikes roll on massive 4.0'' tires that allow you to explore terrain you have never explored before! No matter what kind of conditions you are riding in and surface you are riding on, the Fatty will provide you with an unbelievable amount of grip. Run at lower pressures, these balloons work as well as any advanced suspension system.

Give one of our Tomac and On-One Fatties a try and explore the areas you have never ridden before with a massive smile on your face! Fat Bikes don’t need suspension, they doesn’t need gimmicks, all they need are for you to love them and to ride them every chance that you get.


  • Aluminium and Carbon Framesets
  • SRAM 1X Drivetrains
  • Hydraulic Braking Performance
  • Handbuilt Wheelsets
  • 4 Inch Tyres
  • Top Flight Finishing Kit
View Range



Size & Specs

Bike frame geometry
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)

16 18 20
F Chainstay Length (mm) 445 445 445
G Standover Height (mm) 740 740 740
  Wheelbase (mm)   1140 1155
If you're unsure about the size you need, please call our customer services team to see if we can help +44 (0)1709 38 66 66

Planet X

Fat Bikes range

From £999.99
£83.33/mth - 0% finance
(UK only) - More info
On One 'Fatty' SRAM NX1 Fat Bike

Fatty got PHAT! Built around SRAM's incredible 1X NX groupset there really isn't anything our Fatty Fat Bike cannot do.

  • No need for suspension
  • Riding experience like no other
  • Highly acclaimed SRAM NX1 groupset
  • A true do it all bike