Surly Lowside

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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)
  • Clearance for 26” x 3” or 27.5” x 2.8” tires


Frame Surly Lowside Frame
Fork Surly Lowside Fork
Seatpost Clamp Surly Stainless 33.1mm clamp


Headset Cane Creek
Brakes Promax DSK-300
Brake levers Promax
Rotors ProMax 160/160mm
Shifters n/a
Stem Sunday Freeze top load 22.2mm clamp
Handlebar Surly Sunrise
Grip/Tape Velo Lock-on style
Saddle WTB Volt
Seatpost 2 Bolt, 30.9mm


Crankset SRAM NX 32t
Bottom Bracket SRAM PS
Front Derailleur n/a
Rear derailleur n/a
Cog or cogset Surly 17t w/ spacer kit
Chain KMC X10


Front hub Novatec, 32h, Thru-Axle
Rear hub Novatec, 32h, Thru-Axle
Rims WTB Scrapper i TCS
Tires Maxxis Rekon 27.5x2.8 60tpi EXO