The Surly Moonlander isn’t just a bike — it’s a terrain-defying machine built for places where normal bikes fear to tread. With massive 4.8" tires on 100mm rims, it floats over snow, sand, rocks, roots, gravel, and mud, delivering traction and control previously unimaginable. Its oversized footprint allows for ultra-low tire pressures, turning every ride into a “snowshoe for your bike,” while maintaining stability and confidence in even the most extreme conditions.

Built from 4130 CroMoly steel with frame-specific tubing, the Moonlander combines durability with precision geometry. The frame mimics standard mountain bike geometry with a thoughtfully low bottom bracket for clearance, yet a high enough standover and headtube for comfortable, all-day riding. Its 135mm horizontal dropouts with a derailleur hanger allow flexible drivetrains: singlespeed, internal gear hub, or standard derailleur setups. Whether bushwhacking, snow-trekking, or exploring places where trails don’t exist, the Moonlander thrives in environments others can’t touch.

FEATURES

• Ultra-wide 4.8" tires for maximum float, traction, and low-pressure riding

• Terrain-crushing 100mm rims designed for extreme conditions

• 4130 CroMoly steel frame with double-butted main triangle, TIG-welded and ED coated

• 135mm horizontal dropouts with derailleur hanger for singlespeed, internal gear hub, or derailleur drivetrains

• High standover and headtube geometry for comfort and stability in extreme terrain

• Mechanical disc brake compatibility

SPECIFICATIONS

• Intended Use: All-Terrain / Extreme Conditions

• Wheel Size: 26" (custom fat)

• Braking System: Mechanical Disc

• Frame Material: 4130 CroMoly Steel

• Fork Material: 4130 CroMoly Steel, tapered straight blade, 51mm IS front disc mount

• Weight (Approx.): 16 kg

FRAME & FORK

• Frame: Surly 4130 CroMoly Steel, double-butted main triangle, TIG welded, ED coated

• Fork: 4130 CroMoly, tapered straight blade, 51mm IS front disc mount, 135mm-spaced dropouts