Setting the Bar for Fat Tire Expedition Bikes
Maximalist off-road tourists, explorers looking to get off the beaten path, and survivalists for whom being stranded isn’t an option will all appreciate Pugsley’s wide footprint, long and stable wheelbase, and plethora of accessory mounts.
Since way back in twenty-aught-three, Pugsley has seen it all: intercontinental bikepacking trips, bushwhacking at its finest, mirages in the desert, and countless souls taking on the Arrowhead 135 ultra-endurance race. It’s seen some, shall we say, sticky situations, but it always finds its way out. Its proven track record gives it the calling card as the quintessential fat tire expedition bike.
“Any bike will get you out there. Pugsley will get you home.”
- 135mm-space offset fork allows wheel swapability when the shit really hits the fan (and it will someday, trust us)
- Every accessory barnacle you could ever need
- 142 x 12mm-spaced rear dropout with a dedicated Rohloff torque arm slot
- Clearance for 26" x 4.8" tires in the frame (with drivetrain restrictions), 26" x 4.3" tires in the fork
Select a few bike sizes to compare.
|Reach||15.2 385||15.4 390||15.9 405||16.5 420||17.2 436|
|Stack||22.5 572.5||23.1 586.5||23.6 600||24.2 615||24.8 629|
|Head Tube Angle||69.5°||69.5°||69.5°||69.5°||69.5°|
|Head Tube Length||3.9 100||4.5 115||5.1 130||5.7 145||6.3 160|
|Seat Tube Length||12.9 326.5||14.8 376.5||16.8 427||18.8 478||20.8 529|
|BB Drop||2.6 65||2.6 65||2.6 65||2.6 65||2.6 65|
|Wheelbase||42.4 1076||42.7 1085.7||43.6 1106.4||44.4 1127.1||45.2 1147.8|
|Chainstay Length||18.1 460||18.1 460||18.1 460||18.1 460||18.1 460|
|Top Tube Length, Actual||21.8 552.9||22.0 558.1||22.6 573||23.3 591.3||24.1 613|
|Top Tube Length, Effective||22.0 560||22.8 580||23.6 600||24.4 620||25.2 640|
|Seat Tube Angle||73.0°||72.0°||72.0°||72.0°||72.0°|
|Standover Height||28.9 733.5||30.0 762||31.2 793.5||32.5 825.5||33.7 857|
|Stem Length||2.8 70||2.8 70||3.1 80||3.5 90||3.9 100|
|Handlebar Width||26.9 685||26.9 685||28.9 735||28.9 735||28.9 735|
|Crank Length||6.7 170||6.7 170||6.9 175||6.9 175||6.9 175|
|Fork Length||17.6 447||17.6 447||17.6 447||17.6 447||17.6 447|
|Fork Rake||1.7 43||1.7 43||1.7 43||1.7 43||1.7 43|
- 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, TIG welded, ED coated
- Rear Dropout Configuration
Horizontal slotted with optional vertical dumpout
- Rear Hub Spacing
12 x 142mm (17.5mm Offset) (axle not included)
10 x 135mm with Surly 10/12 Adapter Washers (included)
- Front Hub Spacing
10 x 135mm (17.5mm Offset)
- Rear Brake
Disc - 51mm I.S. (160mm max rotor) 
- Front Brake
Disc - 51mm I.S. (203mm max rotor)
- Head Tube
- Steerer Tube
- Crown Race
- Stock Headset Upper (S.H.I.S.)
- Stock Headset Lower (S.H.I.S.)
- Seat Collar
- Front Derailleur (Clamp)
High direct mount top-pull (Ø28.6mm)
39.5mm offset adapter (not included)
- Max Chainring (CL)
1x (Fat bike 170): 36T
2x (Fat bike 170): 28/36T
- Bottom Bracket
100mm threaded (1.37" x 24TPI)
- Tire Clearance Frame /
26 x 4.8" (rear axle position)
26 x 3.8" (front axle position)
29 x 3.0"
- Tire Clearance Fork 
26 x 4.3"
29 x 3.0"
- Rigid Fork Spec
447 x 43mm
- Max Suspension Fork Length 
- Bottle Mounts Frame
2 Three-Pack (XS)
1 Standard + 2 Three-Pack (S - XL)
- Bottle Mounts Fork
- Rack Mounts Frame
Yes (upper and lower threaded)
- Rack Mounts Fork
Yes - upper and lower. (No mid-blade threaded mounts)
- Fender Mounts Frame
- Fender Mounts Fork
- Other Features
Dedicated Rohloff cable routing and mount for OEM 2 axle plate
 Different tire and rim combinations will result in different clearances.
 Depending on drivetrain configuration, tire clearance may be limited by the chain and not frame.
 Listed chainring clearance is worst case scenario. Clearances vary widely depending on components and configurations.
 Suspension fork length listed at full extension (not at sag)
 Rear disc brake requires Surly’s proprietary brake mount adapter.
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.