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Surly Bikes


Surly Ogre

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When you buy a bike from Aventuron, not only will your bike ship for free, but you will receive a bike that is ready to ride out of the box.

We assemble and tune your bike, then repackage it to ship. When you receive your new bike it will be very easy to assemble.  You will have to attach the front wheel, handlebar, seatpost and pedals. Most bikes do not include pedals, but we have an extensive pedal selection.  We are a family-owned and operated business and look forward to having you as a customer.

The Ogre can get you to your job during the week, then way out of town on the weekend. It’s not sluggish on pavement or gravel and can also hold its own on singletrack. Ogre has many of the same features as Troll — horizontal slotted dropouts with Gnot-Boost spacing, a tweaked non-suspension corrected geometry, and a beefy tire clearance — but in a 29er platform.

  • Surly 4130 chromoly steel, main triangle double-butted frame
  • TIG-welded, Horizontal slotted with derailleur hanger, Gnot-Boost spacing allows the use of 135mm QR hub, 142 x 12mm thru-axle or 148 x 12mm Boost hubs. Features Rohloff torque arm slot and threaded eyelets for fenders, racks and Surly trailer mounts
  • Full-length Surly Trip Guide housing line guides for derailleurs and brakes; two sets of bottle cage mounts; upper seatstay threaded barrels, mid- and low-blade fully threaded through-blade fork eyelets; threaded holes for racks, fenders and trailer mounting nuts; Rohloff OEM2 axle plate mounting slot
  • Disc brakes only. Disc mounts are 51mm IS. Note: rear disc brake is limited to 160mm maximum rotor diameter and requires the use of Surly caliper adaptor (included with frames and bikes)
  • Frame is ED Coated for increased life expectancy
  • Tire clearance for 29 x 2.5” or 27.5 x 3”

Build Kit:



Surly Ogre, Surly 4130 CroMoly steel. Main triangle double-butted. TIG-welded


Surly Ogre, TIG-welded 4130 CroMoly, non-suspension corrected, tapered and butted straight blade. Low- and mid-blade fully threaded through-blade rack eyelets; fender mount eyelets at dropout; 1-1/8˝ x 285mm threadless steer tube, 51mm disc mount (203mm max. rotor diameter), line/housing guides; two sets of bottle cage mounts, each height adjustable (note: cages cannot be used on fork with some racks, and vice versa)



SRAM NX 32T Black

Bottom Bracket

SRAM Powerspline

Front Derailleur


Rear Derailleur

Shimano Deore RD-M6000, 10-speed

Cassette / Cog

Microshift 10 spd, 11-42t




Grips / Bar Tape

Velo Lock-on


Salsa Bend


ProMax 31.8, 4 bolt, black


Cane Creek 40

Front Shifter


Rear Shifter

Microshift SL-M760R

Brake Levers

Tektro HD-M275


Tektro HD-M275


Tektro 160/160mm


WTB Volt Sport


Surly stainless


ProMax 27.2, 300L, offset, Black


Front Hub

Novatec 32h QR Black

Rear Hub

Novatec 32h, Thru axle

Front Thru Axle / QR


Rear Thru Axle / QR

Thru Axle


WTB i29 Black


Surly Extra Terrestrial 29x2.5” 60TPI Slate-wall Tubeless Ready





not included



* Specifications are subject to change without notice



Frame measurements (mm) SM MD LG XL
A. BB Drop 68 68 68 68
B. Chainstay Length 440 440 440 440
C. Fork Length - Axle to Crown 447 447 447 447
D. Fork Offset 43 43 43 43
E. Head Tube Angle (deg) 71.5 72.0 72.0 72.0
F. Headtube Length 110 120 130 150
G. Reach 395.5 410.5 427.6 447.0
H. Seat Tube Angle (deg) 73.0 73.0 73.0 73.0
I. Seat Tube Length - Center to Top 406.4 457.2 508 558
J. Stack 592 603.4 613.0 632.0
K. Standover 763.5 795.7 824.5 857.85
L. Top Tube Length (Effective) 575 595 615 640
M. Wheelbase 1049.4 1064.5 1084.6 1110.0
Component measurements (mm)
Crank Arm Length 170 175 175 175
Handlebar Width 700 740 740 740
Handlebar Rise / Drop - - - -
Stem Length 70 80 90 100
Stem Angle (deg) 6 6 6 6

* All dimensions are preliminary and subject to change

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