- Frame: Surly Moonlander Frame - 100% Surly Chromoly steel, E.D. coated, triple-butted main triangle, TIG-welded
- Fork: Surly Moonlander Fork - 100% Surly Chromoly steel, 1-1/8" straight steerer with tapered straight blade, TIG-welded, E.D. coated, 51mm IS front standard disc mount, 197mm x 12mm thru-axle dropouts (axle included)
- Color: Lunar Dust Gray
- Front Derailleur: N/A
- Rear Derailleur: 9-speed Pinion gearbox
- Cassette: 34t aluminum ring
- Chain: KMC EPT
- Crankset: Pinion for Surly crankset with Pinion high-offset spider, 32t
- Shifter: Pinion twist
- Brakes: Tektro HD M-285
- Rotors: Tektro, 180mm, 6-bolt
- Headset: Cane Creek 40
- Stem: Promax, 31.8, 4-bolt
- Handlebar: Surly Terminal
- Grips / Bar Tape: Velo Lock-on
- Seatpost: TransX YSP15JL Dropper, 125mm travel (100mm travel on SM)
- Saddle: WTB Volt
- Front Hub: 197x12mm, Novatec, 32h, thru-axle
- Rear Hub: 197x12mm, Novatec, 32h, thru-axle
- Rims: Surly Clown Royal 24", 100mm wide
- Tires: Surly Molenda 24 x 6.2", TBD tpi, folding wire bead
What our Experts Think
- Extreme terrain fat tire bike designed for snow, sand, mud, and soft-ground exploration where standard bikes cannot operate.
- Chromoly steel frame delivers maximum durability and a compliant ride feel under very low tire pressures.
- 24" wheel platform paired with ultra-wide tires maximizes flotation, traction, and stability on unstable surfaces.
- Purpose-built geometry prioritizes control and confidence in deep snow, desert terrain, and remote off-road conditions.
- Clearance designed for oversized fat tires enables exceptional grip and “float” across soft, unpredictable terrain.
- Adventure-focused mounting options support cargo setups for expedition riding and long-distance remote travel.
- Built for harsh environments where reliability and simplicity matter more than speed or efficiency.
- “Lunar Dust Gray” finish reinforces its rugged, utilitarian identity for extreme outdoor use.
Q&A
Q: What is the Surly Moonlander designed for?
A: The Surly Moonlander is an extreme fat tire adventure bike built for snow, sand, mud, and other soft or unstable terrain where maximum flotation and traction are required.
Q: What material is the frame made from?
A: It uses 4130 Chromoly steel (Surly Natch tubing), engineered for strength, durability, and stability under heavy loads and low-pressure riding conditions.
Q: What wheel size does the Moonlander use?
A: It is built around 24” fat bike wheels, allowing for extremely wide tires that increase flotation on soft surfaces like snow and sand.
Q: What makes the Moonlander different from other fat bikes?
A: It features one of the widest tire clearances in the Surly lineup, designed specifically for ultra-fat tires and extreme terrain where standard bikes cannot operate effectively.
Q: What type of terrain is it best for?
A: It excels on deep snow, soft sand, muddy trails, and remote wilderness routes where traction and flotation are more important than speed.
Q: Does it support bikepacking setups?
A: Yes. It includes multiple mounting points for racks, cargo, and bottles, making it suitable for expedition-style fat bike touring.
Q: What drivetrain does it typically use?
A: It is commonly built with wide-range, low-maintenance drivetrains designed to handle steep, slow, and heavily loaded riding conditions.
Q: What is special about the “Lunar Dust Gray” color?
A: It is a muted, utilitarian gray finish that matches the Moonlander’s expedition-focused, rugged design aesthetic.
Q: Who is this bike best for?
A: Riders planning extreme off-road adventures in snow, sand, or remote terrain where maximum tire flotation and stability are essential.
Maintenance Tips
• Clean frame, fork, and drivetrain after sand, snow, mud, or wet rides to prevent buildup and corrosion.
• Inspect steel frame and welds regularly for chips, scratches, or early signs of rust.
• Touch up exposed metal promptly to prevent corrosion in harsh riding conditions.
• Apply internal frame rust inhibitor periodically, especially after wet, salty, or winter use.
• Check drivetrain for wear, proper shifting, and keep chain clean and well-lubricated.
• Inspect brakes for pad wear, rotor condition, and consistent stopping power in loose terrain.
• Ensure bolts, axles, and fat tire wheel interfaces are tight and secure before rides.
• Maintain correct fat tire pressure for terrain to reduce rim and sidewall damage.
• Store indoors in a dry environment to preserve steel frame integrity and finish.
• Perform routine pre-ride safety checks of tires, brakes, and shifting before every ride.
Damage 
Loss 
Theft 
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