![Surly Moonlander fat bike in Lunar Dust Gray side view](https://surlybikes.com/uploads/bikes/_medium_image/surly-moonlander-v2-fat-bike-hdr-BK00443-2000x1333.jpg)
![Surly Logo](/images/template_images/logo_surly.jpg)
The fat tire bike purpose-built for rolling over previously unridden terrain.
When we find ourselves with a deep, primal urge to explore beyond the horizons of our beloved Flat Earth, few things satiate this need. Moonlander is one of them.
A portal into previously unridden terrain, Moonlander goes where other fat bikes don’t dare, where traction is a supposed myth and the only grams worth saving are in our Dugout Bag.
Our newly developed, high-volume Molenda tires were key. (Even the fattest in-market tires don’t cut it, and that includes our own line.) Therefore, we equipped this one with 24 x 6.2-inch tires on 100mm rims. Such a large footprint allows us to ride at very low pressure, enabling the ability to float over a geographic smorgasbord of otherworldly terrain. Think rocky dunes, creeping shorelines, frozen beaches, sinuous stretches of snow and the like.
- Carefully crafted from our 4130 Chromoly steel, with a bottom bracket height that supplies plenty of clearance for bushwhacking and monster-trucking without losing out on stability
- Surly's first bike with a 9-speed Pinion gearbox, an innovative approach to spur gearing that improves reliability and go-anywhere performance with less maintenance
Bike Capabilities
- 5/5 with Floatation Floatation: 5 out of 5
- 5/5 with Off-Trail Exploration Off-Trail Exploration: 5 out of 5
- 4/5 with Bikepacking Bikepacking: 4 out of 5
- 5/5 with Turning Heads Turning Heads: 5 out of 5
NOTE: You can ride your bike wherever the hell you want, but this is what we think this bike is best at.
![Surly Moonlander fat bike side view on sand dune](https://surlybikes.com/uploads/bikes/20240709_SUR_Moonlander_CoralPinkDunes_Lifestyle_007.jpg)
![Person riding Surly Moonlander fat bike down sand dune](https://surlybikes.com/uploads/bikes/20240710_SUR_Moonlander_CoralPinkDunes_Lifestyle_298.jpg)
![Person riding Surly Moonlander fat bike focus on tires in sand](https://surlybikes.com/uploads/bikes/20240710_SUR_Moonlander_CoralPinkDunes_Lifestyle_116.jpg)
![Surly Moonlander fat bike close-up of Pinion gearbox, cranks, and bottom bracket area](https://surlybikes.com/uploads/bikes/20240709_SUR_Moonlander_CoralPinkDunes_Lifestyle_030.jpg)
![Surly Moonlander fat bike wheel standing up in sand](https://surlybikes.com/uploads/bikes/20240709_SUR_Moonlander_CoralPinkDunes_Lifestyle_064.jpg)
![Person riding Surly Moonlander fat bike across sand dunes shot from above](https://surlybikes.com/uploads/bikes/20240710_SUR_Moonlander_CoralPinkDunes_Lifestyle_327.jpg)
![Person riding urly Moonlander fat bike down sandy and rocky steps focus on tires](https://surlybikes.com/uploads/bikes/20240710_SUR_Moonlander_CoralPinkDunes_Lifestyle_175.jpg)
![Surly Moonlander fat bike focus on handlebars and top of bike](https://surlybikes.com/uploads/bikes/20240709_SUR_Moonlander_CoralPinkDunes_Lifestyle_032-%281%29.jpg)
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Where to Buy
![Surly Moonlander fat bike in Lunar Dust Gray side view](https://surlybikes.com/uploads/bikes/surly-moonlander-v2-fat-bike-lunar-dust-gray-BK00443-1200x800.jpg)
![Surly Moonlander fat bike frameset in Lunar Dust Gray side view](https://surlybikes.com/uploads/bikes/surly-moonlander-v2-frameset-lunar-dust-gray-FM3090-1200x800.jpg)
Specifications
Frameset
- Frame
- 4130 Chromoly, Natch tubing, double-butted main triangle, TIG welded, ED coated
- Fork
- 4130 Chromoly, Natch tubing, double-butted tapered fork blades, TIG welded, ED coated
- Seatpost Clamp
- Surly Stainless 33.1mm
Components
- Headset
- Cane Creek 40
- Brakes and rotors
- Tektro HD-M285, Tektro 180/180, 6-Bolt
- Shifter
- Pinion Rotary Shifter
- Stem
- Promax, 31.8, 4-bolt
- Handlebar
- Surly Terminal
- Grip/Tape
- Velo Lock-on
- Saddle
- WTB Volt Medium
- Seatpost
- TransX YSP15JL Dropper, 125mm travel (100mm travel on SM)
Drivetrain
- Crankset
- Pinion for Surly crankset 34T, with Pinion high-offset spider
- Bottom Bracket
- Pinion Gearbox
- Front Derailleur
- N/A
- Rear Derailleur
- Pinion C1.9 XR 9spd Gearbox
- Cog or cogset
- 34t aluminum ring
- Chain
- KMC X10 EPT Anti-Rust
Wheels
- Front hub
- Novatec 12x197mm, Thru-Axle, 32h
- Rear hub
- Novatec 12x197mm, Thru-Axle, 32h
- Rims
- Surly Clown Royal 24", 100mm wide
- Tires
- Surly Molenda Tire 24 X 6.2”, 60tpi, Tubeless Ready
Complete bike spec subject to change
![MY25 Moonlander Geo](https://surlybikes.com/uploads/bikes/bridge_club_dimensions.gif)
Select a few bike sizes to compare.
SIZE | SM | MD | LG | XL |
---|---|---|---|---|
Rider Height | 5'4"–5'8" 1626–1728 | 5'7"–6'0" 1702–1829 | 5'11"–6'3" 1803–1905 | 6'2"–6'6" 1880–1981 |
Reach | 15.7 398 | 16.5 420 | 17.5 444 | 18.4 468 |
Stack | 22.8 578 | 23.9 606 | 24.6 625 | 25.3 644 |
Head Tube Angle | 68.5° | 68.5° | 68.5° | 68.5° |
Head Tube Length | 4.7 120 | 5.9 150 | 6.7 170 | 7.5 190 |
Seat Tube Length | 14.5 368 | 16.5 419 | 18.9 480 | 20.5 521 |
BB Drop | 1.8 45 | 1.8 45 | 1.8 45 | 1.8 45 |
Wheelbase | 47.9 1215 | 49.1 1248 | 50.4 1280 | 51.6 1311 |
Chainstay Length | 22.1 562 | 22.1 562 | 22.1 562 | 22.1 562 |
Top Tube Length, Effective | 22.6 575 | 23.8 605 | 25.0 635 | 26.2 665 |
Seat Tube Angle | 73° | 73° | 73° | 73° |
Standover Height | 29.0 736 | 30.3 769 | 31.2 793 | 31.5 801 |
BB Height | 13.7 349 | 13.7 349 | 13.7 349 | 13.7 349 |
Stem Length | 2.4 60 | 2.4 60 | 2.8 70 | 3.1 80 |
Stem Angle | 6° | 6° | 6° | 6° |
Handlebar Width | 28.9 735 | 28.9 735 | 28.9 735 | 28.9 735 |
Crank Length | 6.7 170 | 6.7 170 | 6.7 170 | 6.7 170 |
Fork Length | 18.1 460 | 18.1 460 | 18.1 460 | 18.1 460 |
Fork Rake | 2.0 50 | 2.0 50 | 2.0 50 | 2.0 50 |
- Design Wheel/Tire Size (Tire Clearance)
24” x 6.2”
- Alternate Wheel/Tire Size
26” x 5.1”, 27.5” x 4.8”, 29” x 3”
- Rigid Fork Length
460 x 50mm
- Front Hub Spacing
12 x 197mm (Surly axle included)
- Seatpost Diameter
Ø30.9mm
- Dropper Compatible
Yes, internal dropper post routing compatible
- Front Derailleur Clamp
N/A
- Bottom Bracket
N/A; no frame limitations
- Rear Hub Spacing
12 x 197mm (Surly axle included)
Support
Downloads
- Moonlander Frame Sheet
[pdf] - 1.5MB - Fork Instructions
[pdf] - 6.9MB - Surly Bike Sizing Chart
[pdf] - 308KB - Universal Thru-Axle Instructions
[pdf] - 269KB - Wheel, Rim, and Tire Instructions
[pdf] - 763KB - Bicycle Owner’s Manual (English)
[pdf] - 1.2MB
Frame Warranty
LIMITED WARRANTY
This Surly product is warranted against defects in materials and workmanship for three years from the date of retail purchase of the product, subject to the limitations detailed below. Save your dated receipt for proof of purchase.
This warranty does NOT cover the following:
- Damage due to improper assembly or follow-up maintenance or lack of skill, competence or experience of the user or assembler
- Products that have been modified, neglected, used in competition or for commercial purposes, misused or abused, involved in accidents or anything other than normal use
- Installation of components, parts or accessories not originally intended for or compatible with bicycle as sold
- Damage or deterioration to the paint, surface finish, aesthetics or appearance of the product
- Normal wear and tear
- Labor required to remove and/or refit and re-adjust the product within the bicycle assembly
This limited warranty is expressly limited to the repair or replacement of a defective product, at the option of Surly, and is the sole remedy of the warranty. This limited warranty applies only to the original purchaser of the Surly product and is not transferrable. This warranty applies only to products purchased through an authorized dealer or distributor. In no event shall Surly be liable for any loss, inconvenience or damage, whether direct, incidental, consequential, or otherwise resulting from breach of any express or implied warranty or condition, of merchantability, fitness for a particular purpose, or otherwise with respect to our products except as set forth herein.
This limited warranty gives the consumer specific legal rights, and those rights and other rights may vary from place to place. This limited warranty does not affect your statutory rights.
TO THE EXTENT NOT PROHIBITED BY LAW, THESE WARRANTIES ARE EXCLUSIVE AND THERE ARE NO OTHER EXPRESS OR IMPLIED WARRANTIES OR CONDITIONS INCLUDING WARRANTIES OR CONDITIONS OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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