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Surly Lowside

Surly Lowside
  • Color: Stray Hair Gray
  • Color: Stray Hair Gray
  • Color: Stray Hair Gray
Stray Hair Gray
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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. It's your BMX bike all grown up.

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 single speed mountain bike. 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)
- Spec'd in alternating years with 26 x 3.0 or 27.5 x 2.8 tires, the Lowside remains capable of running either option

WARNING: This product can expose you to chemicals 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 Surly Lowside Frame 4130 Chromoly, Natch tubing, double-butted main triangle, TIG welded, ED coated
Fork Surly Lowside Fork 4130 Chromoly, Natch tubing, double-butted tapered fork blades, TIG welded, ED coated
Headset Cane Creek
Axles Front: 110 x 15mm
Rear: Surly Gnot-Boost, 148 x 12mm
Rims/Wheels Alex MD40
Hubs Novatec, 32h, Thru-Axle
Tires Surly Dirt Wizard 26x3.0 60tpi Tubeless Ready
Crankset SRAM NX
Chainrings 32T
Bottom Bracket SRAM PS
Chain KMC X10
Cassette/Rear Cogs Surly 17T w/ spacer kit
Handlebars Surly Sunrise
Tape/Grips Velo Lock-on style
Stem Sunday Freeze top load 22.2mm clamp
Brake Levers Tektro
Brakes Tektro Hydro M275/276, 160mm rotors
Saddle WTB Volt
Seat Post 2 Bolt, 30.9mm, 400mm

* Subject to change without notice.


Part Numbers

Option UPC MPN Store SKU
Stray Hair Gray / X-Small 657993249239 BK1525
Stray Hair Gray / Small 657993249376 BK1526
Stray Hair Gray / Medium 657993249512 BK1527 210000029628
Stray Hair Gray / Large 657993249659 BK1528
Stray Hair Gray / X-Large 657993249796 BK1529