Moonlander runs 4.8˝ tires on 100mm rims. Such a large footprint allows you to ride them at very low pressure, which (as with a snowshoe) enables unparalleled traction and float over all kinds of terrain…wet stuff, roots, rocks, pebbles, gravel, sand, and many types of snow. Moonlander, like its name implies, is meant to go beyond where normal bikes, even normal fat bikes, can go. It is designed from the ground up to ride where there are no roads, no trails and no people.
Like all of our framesets, Moonlander is made of 4130 cro-moly steel, with tubing designed specifically for this frame. The frame’s geometry is not unlike a standard mountain bike, with a bottom bracket height that supplies plenty of clearance for bushwhacking and monster-trucking while remaining low enough for a stable ride. The toptube maximizes standover height while keeping the headtube fairly high so you can set up your rig with a comfortable, all-day-grind riding position.
The frame features 135mm-spaced horizontal ‘dropouts’ with a derailleur hanger, meaning you can set it up as a singlespeed, with an internal gear hub, or standard derailleur drivetrain. The rear end is offset 28mm to allow the drivetrain and wide tires to play nicely together. Moonlanders come with a 135mm O.L.D. non-offset fork, but if you like being able to swap front and rear wheels you could get one matching the rear offset. In fact, all of our fat forks share the same axle-to-crown and rake measurements, so they’re all interchangeable. The fork sports a 51mm I.S. disc caliper mount designed for a rear brake, and mid-blade thru-eyelets and lower rack barrels for mounting a fender and rack (you’ll probably need to alter something to fit, but the option is there should you choose to).
We offer the Moonlander as a complete bike, with components chosen for their durability and their suitability to the task at hand. Parts include our own strong, light Clown Shoe rims and gnarly Bud and Lou tires. It also comes with our O.D. crank, which supplies plenty of room for the fat shoes while supplying all the gears you need to crawl through muck and fly down hills. Moonlander is also available as a frameset if you would rather kit it out yourself. Frame sizes range from Small (16˝) to XLL (22˝ Extra Long).
Complete bike spec subject to change
FrameSurly Moonlander, Surly 4130 CroMoly steel. Main triangle double-butted. TIG-welded
ForkSurly Moonlander, Tapered straight blade butted 4130 CroMoly. 51mm IS front disc mount. 135mm-spaced dropouts
Seatpost clampSurly Stainless, 30.0mm (Surly stainless included)
CranksetSurly O.D. 100mm, 36/22t
Bottom BracketSurly Enduro, w/sleeve
Front DerailleurShimano SLX FD-676D, Problem Solvers direct mount adapter. Top-pull. Black
Rear DerailleurShimano Deore XT RDT780 SGS, Black
Cog or CassetteShimano SLX CS-HG81-10, 10-speed 11–34t
ChainKMC x10RB, Silver
HeadsetCane Creek 40, 1-1/8˝ threadless. Black
BrakesAvid BB7, Cable actuated. 180/160mm rotors front & rear
Brake LeversAvid SD-7, Black
ShiftersShimano SLX SA-109, 2 x 10
StemKalloy; AS025N, 31.8mm. 7° rise. 4-bolt. Aluminum. Black
HandlebarSalsa Salt Flat, 31.8mm. Black
SaddleVelo VL2155, Steel rails. Black vinyl. Feels pretty o.k.
SeatpostKalloy SP-342, 27.2mm. 350mm. Black
Front HubSurly New Disc 135mm, Disc. 32-hole. Black
Rear HubShimano XT 135mm, 756. Disc. 32-hole. Black
RimsSurly Clown Shoe, Single wall aluminum. Welded seam w/cutouts. 100mm width. Black.
SpokesDT Swiss Champion, 14g. Black
TiresSurly Bud & Lou, 4.8", 120tpi