Surly Lowside 27.5" Frameset Green Astro Turf 2021 Large

Ready Stock


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

  • Frame 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: "Gnot-Boost" 145mm, 12 x 142mm or 12 x 148mm (Surly axle included), 10 x 135mm with Surly 10/12 Adapter Washers (not included)
  • Front Hub Spacing: 15 x 110mm (Surly axle included)
  • Rear/Front Brake: Disc - 51mm I.S. (203mm max rotor)
  • Head Tube: Ø44mm
  • Steerer Tube: Ø28.6mm (1-1/8")
  • Crown Race: Ø30mm (1-1/8")
  • Stock Headset (S.H.I.S): ZS44/28.6 (Upper), EC44/30 (Lower)
  • Seat Collar: Ø33.1mm
  • Seatpost: Ø30.9mm
  • Front Derailleur (Clamp): High direct mount top-pull (Ø34.9mm)
  • Max Chainring (CL): 1x (Mtn):  33T, 1x (Boost):  36T
  • Bottom Bracket: 73mm threaded (1.37" x 24TPI)
  • Tire Clearance Frame: 26 x 3.0", 27.5 x 2.8"
  • Tire Clearance Fork: 26 x 3.0", 27.5 x 2.8"
  • Rigid Fork Spec: 420 x 47mm
  • Max Suspension Fork Length: 490 x 47mm (26" 100mm)
  • Bottle Mounts Frame: 1 Standard
  • Other Features: Internal dropper post routing compatible
  • Color: Green Astro Turf

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