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Surly Bikes


Surly Pack Rat 26" - Hi-Viz Black

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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 Pack Rat is designed around porteur-style racks and front-loading optimization, with a front cargo-specific design to eliminate steering issues. The fork features internal routing for generator hubs and rear frame dropouts to accommodate multiple drivetrain configurations. It’s an ideal choice for loaded commutes and bike trips with a lighter load, but also rides great when unloaded.

  • Features 26" wheels, with room for tires up to 26 x 2.3
  • Surly 8-pack rack included with complete bike
  • 100% Surly 4130 Chromoly frame, main triangle is double-butted; 1-1/8" threadless brazed Chromoly fork
  • Bosses front and rear for cantilever or linear-pull brakes, rack and fender eyelets at the dropouts, eyelets at the crown, and fully threaded through-blade fork eyelets for a front rack
  • Semi-horizontal dropouts with a derailleur hanger for geared or singlespeed drivetrains and/or wheelbase adjustability
  • Safety Hardware Included



Surly Pack Rat, Surly 4130 CroMoly steel. Main triangle double-butted. TIG-welded. ED coated


Surly Pack Rat, 4130 CroMoly, lugged & brazed. Sloping crown w/threaded eyelets, tapered & butted curved blades w/mid-blade rack eyelets, dual dropout eyelets



Shimano FC-R460 48 x 34t

Bottom Bracket

Shimano BB-RS500

Front Derailleur

Shimano Tiagra FD-4700

Rear Derailleur

Shimano Tiagra RD-4700 GS, 10 speed, Black

Cassette / Cog

Microshift 10 spd, 11-34t




Grips / Bar Tape

Black Cork


ProMax Flare-Out 31.8, Black


ProMax DA-296, Black


Cane Creek custom 5, 1-1/8" threadless Black

Front Shifter

Shimano Tiagra ST-4700 2x10

Rear Shifter

Shimano Tiagra ST-4700 2x10

Brake Levers

Shimano Tiagra ST-4700

Front Brake

Tektro CR720

Rear Brake

Tektro CR720


WTB Volt Sport


Surly stainless


ProMax SP-2016, offset


Front Hub

Formula RB51 32h

Rear Hub

Formula RB52 32h

Front Thru Axle / QR


Rear Thru Axle / QR



Alex Adventurer 2, 32h


26/650b- Panaracer Pasela 26x1.5, 650b x 42








* Specifications are subject to change without notice

26-inch Geometry

Frame measurements (mm) 38cm 42cm 46cm 50cm
A. BB Drop 45 45 45 45
B. Chainstay Length 410 410 410 410
C. Fork Length - Axle to Crown 370 370 370 370
D. Fork Offset 44 44 44 44
E. Head Tube Angle (deg) 72.5 73.0 74.0 74.0
F. Headtube Length 90 105 120 135
G. Reach 377 379 386 392
H. Seat Tube Angle (deg) 75.5 75.0 74.5 74.0
I. Seat Tube Length - Center to Top 380 420 460 500
J. Stack 455 471 484 498
K. Standover 685 711.4 736 762
L. Top Tube Length (Effective) 495 505 520 535
M. Wheelbase 960 963 965 975
Component measurements (mm)
Crank Arm Length 165 165 165 170
Handlebar Width 380 380 400 400
Handlebar Rise / Drop - - - -
Stem Length 70 70 70 80
Stem Angle (deg) 6 6 6 6

* All dimensions are preliminary and subject to change

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