NEW Surly Lowside Mountain Frameset - 27.5", Steel, Blue Monday - 210000074238
The Lowside is the bike that gets you across town for a quick rip on singletrack, then over to the bar for a night out. It’s the bike you turn to when you’re not entirely sure what the night has in store. It’s the bike to grab when you want to have just much fun riding to the trail as you do from the trail itself. Singlespeeding is an integral part of Surly’s DNA, and the Lowside continues the tradition, by taking a simpler approach to trail riding.
Features
- 100% Surly 4130 Chromoly frame, main triangle is double-butted; 1-1/8" threadless Chromoly fork
- Singlespeed “specific” (derailleur hanger but no Trip Guides)
- Internal dropper seatpost routing with 30.9mm seat tube ID
- Gnot-Boost rear spacing
- Front and rear Surly thru-axles included
- Designed for 26” x 3” or 27.5” x 2.8” tire clearance
What our Experts Think
Q&A
Q: What makes the Surly Disc Trucker Frameset ideal for touring?
A: The Surly Disc Trucker Frameset is built from durable 100% Chromoly steel and designed for loaded touring, bikepacking, commuting, and long-distance adventure riding. It offers stable handling, disc brake compatibility, and extensive rack, fender, and cargo mounts.
Q: What wheel size does this frameset use?
A: This version is designed for 26-inch wheels, making it an excellent choice for smaller frame sizes and riders seeking durability, comfort, and dependable performance on mixed terrain.
Q: What material is the frame made from?
A: The frame and fork are constructed from Surly's double-butted 4130 Chromoly steel with E.D. coating for long-lasting strength, ride comfort, and corrosion resistance.
Q: Is the Disc Trucker Frameset compatible with racks and fenders?
A: Yes. It features numerous braze-ons and mounting points for front and rear racks, fenders, water bottles, cargo cages, and touring accessories.
Q: What tire clearance does the frame offer?
A: The frameset accommodates tires up to 26" x 2.1" with or without fenders, providing versatility for pavement, gravel roads, and adventure touring.
Q: What braking system is supported?
A: The frame uses flat-mount disc brakes and 12mm thru-axles front and rear for improved stopping power, stiffness, and stability under heavy loads.
Maintenance Tips
- Clean the frame after wet, muddy, or salty rides to prevent corrosion and preserve the finish.
- Inspect the frame, fork, rack mounts, and disc brake mounts regularly for cracks, dents, or loose hardware.
- Touch up paint chips promptly to protect exposed steel from rust.
- Apply a rust inhibitor inside the frame tubes annually, especially if riding in wet climates. Steel frames last decades with proper rust prevention.
- Keep headset, bottom bracket, and thru-axle threads greased to prevent seizing and ease future maintenance.
- Check disc brake mounting bolts and rack/fender hardware before long tours.
- Ensure frame drain holes remain clear so trapped moisture can escape.
- Inspect wheel and tire clearance regularly when running loaded touring setups or larger tires.
- Store indoors in a dry environment to maximize frame life and maintain the durable chromoly steel construction.
Damage 
Loss 
Theft 
