Prospector Frameset, Sage
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.
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.
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
|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|
|Head Tube Length||110mm||130mm||145mm||160mm|
|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|
** At center of top tube with a 27.5x2.8" tire measuring 730mm in diameter.