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” or 27.5 x 2.8” tires, the Lowside remains capable of running either option
  

Frameset

• Frame

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

• Fork

  • Surly Lowside - 4130 Chromoly, Natch tubing, double-butted tapered fork blades, TIG welded, ED coated

Components

• Seatpost Clamp

  • Surly stainless, 33.1mm

Frame Specs

• Design Wheel/Tire Sizes
  • 26 x 3.0"
    
• Max Tire Outer Diameter
  
  • 27.5 x 2.8"
  • Different tire and rim combinations will result in different clearances. Depending on drivetrain configuration, tire clearance may be limited by the chain and not the frame. For suspension fork tire clearance, please reference the fork manufacturer's website.
    
• Frame Construction
  • 4130 Chromoly, Natch tubing, double-butted main triangle, TIG welded, E.D. coated
    
• Fork Construction
  • 4130 Chromoly, Natch tubing, double-butted tapered fork blades, TIG welded, E.D. coated
    
• Rear Spacing
  • "Gnot-Boost" 145mm
    
• Rear Brake (Rotor)
  • Disc - 51mm I.S. (203mm max rotor)
• Front Brake (Rotor)
  • Disc - 51mm I.S. (203mm max rotor)
    
• Headset - Upper
  • ZS44/28.6
    
• Headset - Lower
  • EC44/40
• Front Spacing
  • 15 x 110mm
    
• Crankset (Max Ring)
  • 1x (Mtn): 33T
  • 1x (Boost): 36T
  • Listed chainring clearance is worst-case scenario. Clearances vary widely depending on components and configurations.