Product description
With mountain geo designed around a comfortable, confident drop-bar hand position, it’s lively and responsive on single track, double track, and other degraded surfaces. Ready to haul essential gear for all-day dirt rides and quick bikepacking excursions, thru-axles front and rear provide ideal stiffness and handling. Built around 27.5” wheels and compatible with internally geared hub and single-speed setups, Surly’s tried-and-true Gnot-Boost spacing allows riders to run 142mm or 148mm rear hubs.
- 100% Surly Chromoly steel frame and fork, featuring Surly’s proprietary ’Natch tubing, double-butted main triangle, 1-1/8” headtube, non-suspension corrected
- Horizontal-slotted dropout, Surly Gnot-Boost spacing
- Seatstay-mounted bottle bosses, plus three-pack mounts at the top and bottom of the down tube and stealth dropper post routing
- E.D. coated frame for increased life expectancy
- 27.5 x 2.8” tire clearance (with or without fenders)

Frame measurements (mm) | XS | SM | MD | LG | XL |
---|---|---|---|---|---|
A. BB Drop | 50 | 50 | 50 | 50 | 50 |
B. Chainstay Length | 425 | 425 | 425 | 425 | 425 |
C. Fork Length - Axle to Crown | 420 | 420 | 420 | 420 | 420 |
D. Fork Offset | 50 | 50 | 50 | 50 | 50 |
E. Head Tube Angle (deg) | 69.5 | 69.5 | 69.5 | 69.5 | 69.5 |
F. Headtube Length | 160 | 180 | 200 | 220 | 240 |
G. Reach | 381 | 405 | 420 | 444 | 458 |
H. Seat Tube Angle (deg) | 73.0 | 73.0 | 73.0 | 73.0 | 73.0 |
I. Seat Tube Length - Center to Top | 316 | 386 | 437.2 | 488 | 539 |
J. Stack | 585 | 604 | 623 | 641 | 660 |
K. Standover | 719 | 762 | 796 | 830 | 863 |
L. Top Tube Length (Effective) | 560 | 590 | 610 | 640 | 660 |
M. Wheelbase | 1057 | 1088 | 1109 | 1140 | 1162 |
Component measurements (mm) | |||||
Crank Arm Length | 170 | 170 | 175 | 175 | 175 |
Handlebar Width | 400 | 420 | 440 | 460 | 480 |
Stem Length | 60 or 70 | 60 or 70 | 60 or 70 | 60 or 70 | 60 or 70 |
* All dimensions are preliminary and subject to change
Frameset
Frame
100% Chromoly Steel frame, Natch tubing, double-butted main triangle, TIG welded, E.D. coated
Fork
100% Chromoly Steel fork, Natch tubing, double-butted tapered fork blades, TIG welded, E.D. coated
Seatclamp
Surly Stainless 33.1
Drivetrain
Crankset
Samox 2PCS Boost 32t
Bottom Bracket
Samox BSA 24
Front Derailleur
N/A
Rear Derailleur
Microshift M6205
Cassette / Cog
Microshift 11–48t
Chain
KMC X10 Econo Black or NP/BLK
Components
Grips / Bar Tape
Cork Black
Handlebar
Salsa Cowchipper 31.8
Stem
Promax DA-296, 31.8 or Kalloy AS-007
Headset
Cane Creek 40
Shifter
Microshift SB-M100, AdventX Dual Control Levers
Brakes and Rotors
Tektro Mira MD-C400, Tektro 180/160
Saddle
WTB Volt 142
Seatpost
TransX YSP15, 30.9, 100mm travel
Wheels
Front Hub
Novatec 15x110mm, 32h
Rear Hub
Novatec 12x148mm, 32h
Rims
WTB ST i40 TCS
Tires
Teravail Ehline, 27.5 x 2.5", 60tpi
Tubes
included and installed
Other
Pedals
N/A
Misc
-
* Specifications are subject to change without notice
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