Skip to main content.
Bikes. Parts. Chaos.

A Nimble Front Load-Carrying Bike

Pack Rat is specifically designed around porteur-style racks and front-loading optimization. Dedicated commuters, credit card tourers, and sweaty back people looking to ditch their backpack need look no further.

Having your stuff in front of you allows for better weight distribution, keeping the bike nimble and allowing you to more efficiently use your body English to steer from the rear. The drawback typically lies in how it affects the bike’s handling. Pack Rat’s front cargo-specific design eliminates those issues, leaving you wondering if you’re really even hauling any cargo at all.

  • Optimized for carrying front loads, complete bike includes front rack
  • Internal routing on fork for generator hubs
  • Frame sizes 38–50cm have clearance for 26’ x 2.0˝ tires. Frame sizes 52–58cm have clearance for 650b x 48mm tires (with or without fenders).

 

WARNING

Failure to properly install, use, or maintain this rack, including use without the required security hardware MAY ALLOW THE RACK TO FALL ONTO THE FRONT WHEEL causing a loss of control and crash leading to serious damage to the bicycle or serious personal injury.

IMPORANT SAFETY INFORMATION: Rack instructions contain safety-critical steps for correct installation of the bolts, struts, and clamps that make up this rack system, including steps for proper installation of new security hardware. Security hardware is safety-critical and must be used on all 8- and 24-Pack Racks. DO NOT USE AN 8- OR 24-Rack Rack THAT DOES NOT INCLUDE SECURITY HARDWARE.
 
Loaded Pack Rat
Woman riding Pack Rat in the park
Loaded Pack Rat
Loaded Pack Rat in an alley

Specifications

2018 Pack Rat Geo - 26inch
units:
SIZE 38cm 42cm 46cm 50cm
Reach 14.6 371 14.7 372 14.9 378 15.1 384
Stack 18.9 479 19.5 495 20.2 512 20.8 527
Head Tube Angle 72.5° 73° 74° 74°
Head Tube Length 3.5 90 4.1 105 4.7 120 5.3 135
Seat Tube Length 15.0 380 16.5 420 18.1 460 19.7 500
BB Drop 1.8 45 1.8 45 1.8 45 1.8 45
Wheelbase 37.9 962 37.9 963 38.0 965 38.4 975
Chainstay Length 16.1 410 16.1 410 16.1 410 16.1 410
Top Tube Length, Actual 18.9 479.6 19.3 490.2 20.0 508 20.7 527
Top Tube Length, Effective 19.5 495 19.9 505 20.5 520 21.1 535
Seat Tube Angle 75.5° 75° 74.5° 74°
Standover Height 27.5 698 28.5 725 29.6 751 30.6 777
Stem Length 2.8 70 2.8 70 2.8 70 3.1 80
Stem Angle
Handlebar Width 15.0 380 15.0 380 15.7 400 15.7 400
Crank Length 6.5 165 6.5 165 6.5 165 6.7 170
Fork Length 14.6 370 14.6 370 14.6 370 14.6 370
Fork Rake 1.7 44 1.7 44 1.7 44 1.7 44
SIZE 52cm 54cm 56cm 58cm
Reach 15.2 387 15.4 392 15.6 397 15.8 402
Stack 21.7 551 22.3 566 22.8 580 23.4 595
Head Tube Angle 74.0° 74.0° 74.0° 74.0°
Head Tube Length 5.1 130 5.7 145 6.3 160 6.9 175
Seat Tube Length 20.5 520 21.3 540 22.0 560 22.8 580
BB Drop 2.2 55 2.2 55 2.2 55 2.2 55
Wheelbase 38.8 986 39.2 996 39.6 1005 39.9 1014
Chainstay Length 16.3 415 16.3 415 16.3 415 16.3 415
Top Tube Length, Actual 21.3 541 21.9 557 22.5 572 23.2 588.5
Top Tube Length, Effective 21.7 550 22.2 565 22.8 580 23.4 595
Seat Tube Angle 73.5° 73.0° 72.5° 72.0°
Standover Height 31.7 805 32.3 821 33 837 33.6 854
Stem Length 3.1 80 3.5 90 3.5 90 3.9 100
Stem Angle
Handlebar Width 16.5 420 16.5 420 17.3 440 17.3 440
Crank Length 6.7 170 6.7 170 6.9 175 6.9 175
Fork Length 15.4 390 15.4 390 15.4 390 15.4 390
Fork Rake 1.7 44 1.7 44 1.7 44 1.7 44
Frame Construction

4130 Chromoly, Natch tubing, double-butted main triangle, TIG welded, ED coated

Fork Construction

4130 Chromoly, Natch tubing, double-butted tapered fork blades, brazed lugs, ED coated

Rear Dropout Configuration

Semi-horizontal

Rear Hub Spacing

"Gnot-rite" 132.5mm

10 x 130mm or 10 x 135mm

Front Hub Spacing

10 x 100mm

Rear Brake

Rim - Canti

Front Brake

Rim - Canti

Head Tube

Ø34mm

Steerer Tube

Ø28.6mm (1-1/8")

Crown Race

Ø30mm (1-1/8")

Stock Headset Upper (S.H.I.S.)

EC34/28.6

Stock Headset Lower (S.H.I.S.)

EC34/30

Seat Collar

Ø30mm

Seatpost

Ø27.2mm

Front Derailleur (Clamp)

Bottom-pull (Ø28.6mm)

Max Chainring (CL)[3]

1x (Road): 50T

2x (Road): 39/53T

Bottom Bracket

68mm threaded (1.37" x 24TPI)

Tire Clearance Frame [1]/[2]

26in: 26 x 2.0" (38 - 50cm) (with or without fenders)

650b: 650b x 48mm (52 -58cm) (with or without fenders)

Tire Clearance Fork [1]

26in: 26 x 2.0"" (38 - 50cm) (with or without fenders)

650b: 650b x 48mm (52 -58cm) (with or without fenders)

Rigid Fork Spec

400 x 44mm

Max Suspension Fork Length [4]

N/A

Bottle Mounts Frame

1 Standard + 2 Three-Pack

Bottle Mounts Fork

N/A

Rack Mounts Frame

Yes (upper and lower threaded)

Rack Mounts Fork

Yes (upper and mid-blade threaded)

Fender Mounts Frame

Yes

Fender Mounts Fork

Yes

Other Features

Downtube mounted shifter bosses (cable housing stops not included with frameset)

  • [1] Different tire and rim combinations will result in different clearances.  
    [2] Depending on drivetrain configuration, tire clearance may be limited by the chain and not frame.
    [3] Listed chainring clearance is worst case scenario.  Clearances vary widely depending on components and configurations.
    [4] Suspension fork length listed at full extension (not at sag) 

Support

Frame Warranty

LIMITED WARRANTY

This Surly product is warranted against defects in materials and workmanship for three years from the date of retail purchase of the product, subject to the limitations detailed below. Save your dated receipt for proof of purchase.

This warranty does NOT cover the following:

  • Damage due to improper assembly or follow-up maintenance or lack of skill, competence or experience of the user or assembler
  • Products that have been modified, neglected, used in competition or for commercial purposes, misused or abused, involved in accidents or anything other than normal use
  • Installation of components, parts or accessories not originally intended for or compatible with bicycle as sold
  • Damage or deterioration to the paint, surface finish, aesthetics or appearance of the product
  • Normal wear and tear
  • Labor required to remove and/or refit and re-adjust the product within the bicycle assembly

This limited warranty is expressly limited to the repair or replacement of a defective product, at the option of Surly, and is the sole remedy of the warranty. This limited warranty applies only to the original purchaser of the Surly product and is not transferrable. This warranty applies only to products purchased through an authorized dealer or distributor. In no event shall Surly be liable for any loss, inconvenience or damage, whether direct, incidental, consequential, or otherwise resulting from breach of any express or implied warranty or condition, of merchantability, fitness for a particular purpose, or otherwise with respect to our products except as set forth herein.

This limited warranty gives the consumer specific legal rights, and those rights and other rights may vary from place to place. This limited warranty does not affect your statutory rights.

TO THE EXTENT NOT PROHIBITED BY LAW, THESE WARRANTIES ARE EXCLUSIVE AND THERE ARE NO OTHER EXPRESS OR IMPLIED WARRANTIES OR CONDITIONS INCLUDING WARRANTIES OR CONDITIONS OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.