URSA Major Titanium Expedition

ursa-major-expedition-backcountry-profile-view.jpg
ursa-major-expedition-backcountry-side-view.jpg
URSA-Major-Titanium-GEO-Chart.jpg
CHUMBA USRA MAJOR Titanium mrp blue (1 of 1).jpg
CHUMBA USRA MAJOR Titanium Frame (1 of 3)-2.jpg
CHUMBA USRA MAJOR Titanium Frame (1 of 3).jpg
CHUMBA USRA MAJOR Titanium Frame (2 of 3)-2.jpg
CHUMBA USRA MAJOR Titanium Frame (2 of 3).jpg
CHUMBA USRA MAJOR Titanium Frame (3 of 3)-2.jpg
CHUMBA USRA MAJOR Titanium Frame (3 of 3).jpg
ursa-major-expedition-backcountry-profile-view.jpg
ursa-major-expedition-backcountry-side-view.jpg
URSA-Major-Titanium-GEO-Chart.jpg
CHUMBA USRA MAJOR Titanium mrp blue (1 of 1).jpg
CHUMBA USRA MAJOR Titanium Frame (1 of 3)-2.jpg
CHUMBA USRA MAJOR Titanium Frame (1 of 3).jpg
CHUMBA USRA MAJOR Titanium Frame (2 of 3)-2.jpg
CHUMBA USRA MAJOR Titanium Frame (2 of 3).jpg
CHUMBA USRA MAJOR Titanium Frame (3 of 3)-2.jpg
CHUMBA USRA MAJOR Titanium Frame (3 of 3).jpg

URSA Major Titanium Expedition

from 7,995.00
Size:
Fork:
Tires:
Quantity:
Add To Cart

URSA Major Titanium Expedition Component Selection

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 (upgrade)

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: Rohloff 180mm 4 Bolt
  • Rear Brake Adaptor: Rohloff 180 PM

Drivetrain:

  • Rear Hub: Rohloff Speedhub XXL 190xQR or 197x12 (either Qr or Thru-axle)
  • Bottom Bracket: Kogel Ceramic CROSS 100 BSA
  • Crankset: RaceFace Turbine Cinch w/104BCD Spider 190 175mm
  • Chainring: Wolftooth Components 32T Stainless Steel Ring 
  • Cog: Rohloff 16T Splined Cog and Carrier
  • Chain: KMC K810SL Silver, Nickel Plated Superlight 
  • Shifters: Rohloff Grip Shifter (option upgrade to trigger shifter call for details)
  • Cables and Housing: SP-41 Housing and Stainless Cable

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 Hub: Schmidt Dynamo SON 15 Thru 150x15, Black, w/Piggy Back Connectors
  • Front Rim: Sun Ringle Mulfut 80SL, comes tubeless installed
  • Rear Wheel: Rohloff Speedhub XXL 190xQR or 197x12 (either Qr or Thru-axle)
  • Rear Rim: Sun Ringle Mulfut 80SL, comes tubeless installed
  • Spokes: DT Swiss Competition w/ Brass Nipples
  • 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

  • Tout Terrain The Plug III Dynamo USB Charger, w/Piggy Back Connectors
  • Schmidt E-Delux Dynamo Headlight w/ on off switch, Black
  • Schmidt Aluminum Handlebar Light Mount
  • Fork Bag: 2 Wanderlust Gear Monida Bag w/2 Anything Cages 
  • Frame Bag: Wanderlust Gear Divide Frame Bag w/ Daisy Chain Mounting System
  • Stem/Bar Bags: 2 Wanderlust Gear Rattlesnake Bags
  • Bar System: Wanderlust Gear Sawtooth Mainroll and Front Pocket
  • Saddle Bag: Wanderlust Gear Shenandoah Saddle Bag
  • Top Tube: Beargrass Top Tube Bag w/ Daisy Chain Mounting System

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.