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Surly Lowside

Surly Lowside
Image differs from actual product (See Specifications for Wheel and Tire Specs)
  • Image differs from actual product (See Specifications for Wheel and Tire Specs)
Astro Green
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Lowside is the bike that gets you across town for a quick rip on singletrack, then over to the bar for a night out.

Lowside is like the grownup version of the bike you rode when you were a kid and still had hopes and dreams and some semblance of ambition. It’s just as happy riding singletrack as it is parked outside your favorite drinking establishment.

Lowside is a singlespeed. Singlespeeding has been a part of Surly’s DNA since day one when we launched the 1x1 Rat Ride. After a lot of Homie Fall Fests and more feats of strength than we can recall, we decided to discontinue it a couple years back. Lowside picks up right where the 1x1 left off.

Some have dubbed the Lowside the ultimate pub cruiser.

- Modern trail standards: dropper post compatibility, 44mm headtube, Gnot-Boost rear spacing, thru-axles
- Compatibility with most mountain bike standards makes it the perfect parts bin bike (no rim brakes allowed though)
- Clearance for 26 x 3 or 27.5 x 2.8 tires

WARNING: This product can expose you to chemicals including known to the state of California to cause cancer and birth defects or other reproductive harm. For more information, go to

WARNING: Cycling can be dangerous. Bicycles and bicycle products should be assembled and serviced by a professional mechanic. Never modify your bicycle or accessories. Read and follow all product instructions and warnings including information on the manufacturer’s website. Inspect your bicycle before every use. Always wear a helmet.


Frame 4130 Chromoly, Natch tubing, double-butted main triangle, TIG welded, ED coated
Fork 4130 Chromoly, Natch tubing, double-butted tapered fork blades, TIG welded, ED coated
Headset Crane Creek
Axles Front: 15 x 110mm
Rear: "Gnot-Boost" 145mm
Rims/Wheels Alex MD40
Hubs Formula, 32h
Tires Surly Dirt Wizard 26 x 3" 60tpi
Crankset SRAM NX
Chainrings 32T
Bottom Bracket SRAM Power Spline
Chain KMC x10-1
Cassette/Rear Cogs Surly 16t w/ spacer kit
Handlebars Surly Sunrise w/ Shim
Tape/Grips Velo Lock-on style
Stem 4 bolt, 31.8mm clamp
Brake Levers ProMax
Brakes ProMax DSK-300
Saddle WTB Volt
Seat Post 2 Bolt, 30.9mm

* Subject to change without notice.


Part Numbers

Option UPC MPN
Astro Green / X-Small 708752282018 BK0885
Astro Green / Small 708752282032 BK0886
Astro Green / Medium 708752282056 BK0887
Astro Green / Large 708752282070 BK0888
Astro Green / X-Large 708752282094 BK0889