Surly Lowside Frameset

The Lowside is designed specifically as a single-speed platform. It does not include a derailleur hanger, so you cannot easily mount a rear derailleur for a geared drivetrain.

Surly's Gnot-Boost spacing is 148mm, which allows you to use standard 148mm Boost thru-axle hubs. It is a versatile standard that accommodates modern mountain bike wheelsets while maintaining the frame's intended geometry.

Yes, the frame is compatible with 30.9mm dropper posts. It features external cable routing, so you will need to use a dropper post with an externally routed cable.

Running 26-inch wheels will give the bike a tighter, more BMX-inspired feel that is highly maneuverable and playful. Switching to 27.5-inch wheels provides better rollover capability and slightly more stability on rougher trail sections.

While a rigid fork requires more active line choice and body movement on technical terrain compared to a suspension fork, the Lowside is fully capable of handling singletrack. It is best suited for riders who prefer a direct, responsive connection to the trail and want a low-maintenance setup.

The Lowside uses a standard 73mm threaded bottom bracket shell. This is a reliable, easy-to-service standard that works with a wide variety of mountain bike cranksets.