Tumbleweed

Prospector Frameset, Midnight

Sale price Price $2,476.33 Regular price Unit price  per 

The Prospector is our timeless and rugged expedition mountain touring bike, designed around the stalwart Rohloff Speedhub drivetrain.

It’s a bike designed to be reliable, tough and field serviceable in the harshest of conditions.

 

Features

  • In the face of ever changing bicycle part standards and the integration of exotic materials, the Prospector is built to last and to buck the trend of short product cycles and throw away upgrade culture.

  • We believe that the most important features of a reliable expedition bike are a comfortable fit, a tough frame/fork, strong wheels, reliable components, and as much tire/mud clearance as possible.

  • While the Prospector is derailleur compatible, it was designed specifically around the Rohloff SPEEDHUB, a 14 speed internally geared drivetrain that has proven itself to be supremely dependable and capable. We've been using Rohloff hubs on our tours for over a decade and tens of thousands of miles through sand, mud, snow and at elevations of up to 18,000' without issue.

  • The Prospector has several features that separate it from other expedition bikes. A Phil Wood eccentric bottom bracket offers half an inch of bottom bracket height adjustability, custom cast dropouts work seamlessly with the Rohloff hub, and a hollow chainstay yoke maximizes every millimeter of mud and tire clearance to round out a complete package that can take you anywhere in the world with confidence.

Specs

  • Frame Material: Heat treated size specific Chromoly tubing, oversized triple and quad butted front triangle with integrated gussets

  • Rack/Fender Compatibility: Rack and fender compatible, three bottle mounts on frame triangle

  • Fork: Unicrown Chromoly steel with 135mm quick release or 110x15mm thru axle (thru axle included), upper and lower rack mounts, fender mounts, triple bottle cage mounts on fork legs, internal dynamo wire routing

  • Max Tire Clearance: 26x4.0", 27.5x2.8-3.8˝ and 29 x 2.1-3.0˝, individual tire and rim combos affect tire clearance

  • Headtube: 44mm I.D.

  • Headset: Recommend EC44 lower cup. ZS44 upper cup.

  • Bottom Bracket: 73mm, threaded English (1.37˝ x 24t) Phil Wood Eccentric Insert. M8 cupped point set screws (8mm x 1.25 thread pitch)

  • Rear Axle: 135mm quick release

  • Seatpost Diameter: 31.6mm

  • Dropper Seatpost Compatibility: Internally routed for dropper post

  • Seat Clamp: (included) 35mm

  • Drivetrain Compatibility: Rohloff or 1x derailleur drivetrain recommended

  • Brake Compatibility: 51mm I.S. disc caliper mounts, 180mm max rotor size, minimum 160mm rotor

  • Fork Axle to Crown: 483mm

  • Fork Steer Tube Length: 300mm

  • Rear dropouts: Vertical with integrated non-driveside Rohloff OEM slot and replaceable derailleur hanger, 135mm quick release or bolt-on hub spacing compatibility; features threaded M5 and M6 eyelets for fenders and racks

  • Chainring clearance: 1X Boost, 1X Super Boost

  • Crank clearance: Chainstay width is 140mm, crank arms must have 144mm inner width, 24mm spindle recommended

Geometry

Frame Geometry Small Medium Large Extra Large
Effective Top Tube Length 590mm 610mm 630mm 650mm
Seat Tube Length 15" 17" 19" 21.5"
Head Tube Angle 69.5° 69.5° 69.5° 69.5°
Seat Tube Angle 73° 73° 73° 73°
Bottom Bracket Drop* 58.5mm 58.5mm 58.5mm 58.5mm
Chainstay Length* 456mm 456mm 456mm 456mm
Head Tube Length 110mm 130mm 145mm 160mm
Fork Length 482mm 482mm 482mm 482mm
Wheelbase 1118mm 1139mm 1160mm 1181mm
Fork Offset 53mm 53mm 53mm 53mm
Stack 608mm 626mm 640mm 655mm
Reach 404mm 409mm 434mm 451mm
Standover** 772mm 806mm 837mm 871mm
Recommended Rider Height 5'2"-5'7" 5'6"-5'10" 5'10"-6'2" 6'1"-6'7"
Recommended Rider Saddle Height 63-69cm 68-73cm 74-81cm 80-88cm
* Bottom Bracket Drop and Chainstay Length measured at the center off the bottom bracket shell.
** At center of top tube with a 27.5x2.8" tire measuring 730mm in diameter.

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