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 Construction | 
 4130 Chromoly, Natch tubing, double-butted main triangle, TIG welded, ED coated  | 
|---|---|
| Fork 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  | 
| Front Hub Spacing | 
 15 x 110mm (Surly axle included)  | 
| Rear Brake | 
 Disc - 51mm I.S. (203mm max rotor)  | 
| 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 Upper (S.H.I.S) | 
 ZS44/28.6  | 
| Stock Headset Lower (S.H.I.S) | 
 EC44/30  | 
| Seat Collar | 
 Ø33.1mm  | 
| Seatpost | 
 Ø30.9mm  | 
| Front Derailleur (Clamp) | 
 High direct mount top-pull (Ø34.9mm)  | 
|---|---|
| Max Chainring (CL) [3] | 
 1x (Mtn):  33T  | 
| Bottom Bracket | 
 73mm threaded (1.37" x 24TPI)  | 
| Tire Clearance Frame [1]/[2] | 
 26 x 3.0"  | 
| Tire Clearance Fork [1] | 
 26 x 3.0"  | 
| Rigid Fork Spec | 
 420 x 47mm  | 
| Max Suspension Fork Length [4] | 
 490 x 47mm (26 100mm)  | 
| Bottle Mounts Frame | 
 1 Standard  | 
| Bottle Mounts Fork | 
 N/A  | 
| Rack Mounts Frame | 
 N/A  | 
| Rack Mounts Fork | 
 N/A  | 
| Fender Mounts Frame | 
 N/A  | 
| Fender Mounts Fork | 
 N/A  | 
| Other Features | 
 Internal dropper post routing compatible  |