Lowside – New Pig Smell

Surly Lowside – New Pig Smell

Your BMX Bike, All Grown Up

The Surly Lowside is a single-speed trail slayer built for riders who never forgot the joy of ripping around on a BMX bike. It’s the grown-up version of the bike you loved as a kid—with all the attitude, plus modern trail geometry and standards.

It’s just as happy ripping singletrack as it is parked outside your favorite bar. With clearance for 26 x 3.0” or 27.5 x 2.8” tires, Gnot-Boost rear spacing, and dropper post compatibility, the Lowside is as capable as it is fun. Whether you're building from your parts bin or keeping it clean and simple, this bike is all about keeping it real—and rowdy.

Key Features:

• Color: New Pig Smell (yep, that’s the name)

• 4130 Chromoly steel frame & fork, ED coated for longevity

• Singlespeed-ready, no derailleurs, no distractions

• Dropper post compatible, with modern trail geometry

• Gnot-Boost rear spacing: fits 142mm, 148mm, or 135mm hubs (with adapters)

• Clearance for 26 x 3.0” or 27.5 x 2.8” tires

• Spec’d with Surly Sunrise bars, WTB Volt saddle, and SRAM NX cranks

• One bottle mount — stay hydrated

Build Kit & Specs:

Frame & Fork:

• Frame: Surly Lowside, 4130 Chromoly, ED coated, TIG welded

• Fork: Surly Lowside, 4130 Chromoly, tapered blades, ED coated

Components:

• Headset: Cane Creek

• Seatpost: Promax SP-2019, Ø30.9mm

• Clamp: Surly Stainless, Ø33.1mm

• Stem: Sunday Freeze Top Load

• Handlebar: Surly Sunrise

• Grips: Velo Black Lock-On

• Saddle: WTB Volt

Drivetrain:

• Crankset: SRAM NX 32T

• Chain: KMC X10

• Cog: Surly 17T with spacer kit

• Shifter & Derailleurs: N/A – single speed setup

Brakes:

• Tektro HD-M275 (XS: HD-M276) hydraulic disc

• Rotors: Tektro 160mm front & rear, 6-bolt

Wheels:

• Rims: ALEX MD40 26"

• Tires: Surly Dirt Wizard 26 x 3.0", 60tpi

• Front Hub: Novatec 15 x 110mm

• Rear Hub: Novatec 12 x 148mm

• Spokes: 14G Black

Weight:

• Medium complete: 31 lb 6 oz

Frame Specifications:

Wheel/Tire Sizes:

• Standard: 26 x 3.0"

• Alternate: 27.5 x 2.8"

Frame Construction:
4130 Chromoly steel, TIG welded, double-butted, ED coated

Fork Construction:
Same as frame, 420mm axle-to-crown, 47mm offset

Spacings & Compatibility:

• Rear: “Gnot-Boost” 145mm (12 x 142mm / 148mm compatible)

• Front: 15 x 110mm thru-axle

• Rear axle: Surly 12mm included / adapters for 10 x 135mm not included

• Bottom Bracket: 73mm threaded

• Max Chainring: 1x Boost: 36T / Non-Boost: 33T

Headset:

• Upper: ZS44/28.6

• Lower: EC44/30

• Steerer Tube: 1-1/8"

Seatpost: Ø30.9mm (dropper compatible)
Clamp: Ø33.1mm
Bottle Mounts: 1 standard
Fender Mounts: Not included
Fork Mounts: None

Whether you’re smashing trail laps, rolling to your favorite patio, or keeping things minimal, the Surly Lowside is a true steel-framed fun machine.

Specifications subject to change without notice.