URSA Major Titanium Backcountry

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URSA Major Titanium Backcountry

from 4,695.00
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URSA Major Titanium Backcountry COMPONENTS

Frame/Fork:

  • CHUMBA Frame: URSA Major Titanium Fat-bike (Made in USA)
  • Rear Axle: Paragon Machine Works 197x12 Thru-Axle (Made in USA)
  • Bottle Cage Bolt Set: 5mm Stainless
  • Fork: ICT Steel Fork 150x15 with Bottle/Rack Mounts or MRP Fat Fork Carbon 150x15

Brakes:

  • Front Brake: TRP Spyke Alloy Mechanical Disc Brake Caliper Black 
  • Rear Brake: TRP Spyke Alloy Mechanical Disc Brake Caliper Black
  • Brake Levers: TRP ML930 Linear Pull Brake Levers Black
  • Front Brake Rotor:  TRP 180mm Rotor
  • Front Brake Adaptor: Shimano 180 PM
  • Rear Brake Rotor: TRP 180mm Rotor
  • Rear Brake Adaptor: Shimano 180 PM

Drivetrain:

  • Bottom Bracket: RaceFace Team w/Phil Wood BSA 100
  • Crankset: RaceFace Aeffect 190 175mm
  • Chainring: RaceFace Turbine 2x10, 36/22T
  • Cassette: Shimano XT M780 11-36T XT 10-spd 
  • Chain: Shimano CN-HG95 SUPER NARROW HG 10spd
  • Shifters: Shimano SL-M780, Shift Lever Set, 2/3x10-Speed, w/O.G.D,
  • Cables and Housing: SP-41 Housing and Stainless Cable
  • Rear Derailleur: Shimano XT 10-spd Mid Shadow Plus Clutch

Steering/Seating:

  • Headset: Cane Creek 110 Series ZS44/EC44 Tapered
  • Headset Spacers:  Cane Creek Alloy
  • Handlebar: Thomson Titanium Flat 31.8mmx730mm, 12° sweep
  • Stem: Thomson X4 Black (we'll call you to select size)
  • Grips: RaceFace Strafe Black Lock-on
  • Saddle: RaceFace Aeffect Black
  • Seatpost: Thomson Elite 31.6mm x 410mm, no-offset

Wheels/Tires

  • Front Wheel: Sun Ringle Mulfut 80SL, comes tubeless installed
  • Rear Wheel: Sun Ringle Mulfut 80SL, comes tubeless installed
  • Wheel Upgrade: Dirt Components Carbon Rim to Industry Nine thru-axle hubset (call for details)
  • Front Tire: Maxxis Minion 4.0" FBF EXO TR or Minion/Colossus 4.8" FBF EXO TR
  • Rear Tire: Maxxis Minion 4.0" FBR EXO TR or Minion/Colossus 4.8" FBR EXO TR

Bikepacking Kit/Bagset

  • Frame Bag: Wanderlust Gear Divide Frame Bag w/ Daisy Chain Mounting System
  • Option to add additional Wanderlust Gear bikepacking bags (call or email)

Frame Details

  • Made in USA
  • CHUMBA USA Select Steel, ovalized chainstays and oversized tubes, bent downtube gives plenty of room for a Bluto fork in 360 degrees.
  • English threaded 100mm Paragon Machine Works Bottom Bracket. 
  • Oversized 44mm headtube fits tapered forks.
  • Paragon Machine Works sliding dropout inserts
  • 3" - 5" Tire compatible, offering one of the shortest steel chainstay lengths out there for both tire sizes, 435mm with a 4.0 tire and 455mm with a 4.8" tire
  • Short chainstays are best for snow riding giving more traction in the snow and more balance. They also happen to be more fun for trail riding on a 26" fatbike.
  • The frame can be used with 190 Quick release hubs or 197 thru axle hubs, depending on the chosen insert.

Fork options include: Rockshox Bluto 100mm or Bluto 80mm and MRP RockSolid Fat Carbon 150mm Fork.

  • When upgrading to suspension, we recommend going for the full 100mm fork option on Medium and Large sizes, 80mm on Small. 
  • We've found the 69 headtube angle to be the best at snow and trail racing, which you'll have with the rigid or an 80mm Bluto. 
  • The 100mm gives a more aggressive trail stance and slacker headtube angle of about 67.5º, 68º when sagged.