Velopedia Bicycle Archive
Surly Skid Loader - Illegal Smile Green
Electric-assist bicycle from the Velopedia specification archive.
- Model year
- Not published by manufacturer
- Original MSRP
- $4,599.00
- Sizes
- Small; Medium; Large
- Colors
- Illegal Smile Green
- Weight
- 60 lbs 15 oz for Medium
- Geometry
- 3 manufacturer sizes
- Archive ID
- 900000569
- Catalog verified
- August 14, 2026
Current market
Checking current listings…Velopedia analysis
What the specifications mean
The calculated 436% cassette spread is a clearer measure of gearing breadth than the component-group name by itself. The 27.5-inch/650B label corresponds to a 584 mm bead-seat diameter, which is the dependable reference for tire and rim compatibility. Tubeless-ready means the rims and tires are designed to support a tubeless setup; it does not confirm that the bike is currently set up without tubes. That still depends on the rim tape, valves, sealant and tire condition.
Gearing
436% cassette range
Calculated from the published 11–48-tooth sprocket span.
Wheel standard
650B · 584 mm
The ISO bead-seat diameter is the dependable tire and rim compatibility reference.
Tire setup
Tubeless-ready
The rims and tires may support tubeless use, but the bike may still be running tubes.
Frame inspection
Steel
Paint damage and moisture entry matter because corrosion can start externally or inside the frame.
Used-bike inspection
If you’re buying this bike used
Before any test ride: both brakes should stop the bike firmly and release cleanly; both wheels should run true and be securely attached; tires should have no casing damage; and the headset, handlebar, stem, cranks and pedals should have no looseness or play.
- FrameCheck paint chips, vent holes and the inside of the seat tube for corrosion. Also look for dents, bent tubes and cracking around welded or brazed joints.
- DrivetrainShift through the full range under light load, measure chain wear and inspect the cassette or freewheel teeth. Skipping or hesitation can indicate wear, poor adjustment or mismatched parts.
- Wheels & tiresSpin both wheels and watch the rims for side-to-side or vertical movement. Check for dents, cracks, loose or uneven spokes and hub play, then inspect both tire casings for cuts, cracking or exposed threads. If it is set up tubeless, confirm both tires hold pressure and ask when the sealant was last refreshed.
- BrakesTest each brake separately and confirm it stops firmly and releases cleanly. Inspect the pads and braking surfaces for wear or contamination, and check the cables or hoses for damage.
This interpretation explains relationships in the published data. Confirm exact standards and dimensions before ordering parts or performing service.
Frameset
| Frame Construction | 100% Surly Chromoly Steel, Natch tubing, double-butted main traingle, TIG welded, E.D. coated |
|---|---|
| Frame Material | Steel |
| Fork | 100% Surly Chromoly Steel, Natch tubing, double-butted tapered fork blades, TIG welded, E.D. coated |
| Fork Material | Steel |
Drivetrain
| Shifters | Shimano CUES U6000 |
|---|---|
| Front Derailleur | N/A |
| Rear Derailleur | Shimano CUES U6000 GS |
| Crankset | FSA CK-763, 38t |
| Cassette | Shimano Linkglide LG300 11-48t 10sp |
| Chain | Shimano Linkglide LG500 |
Brakes
| Brakes | Brake Calipers: Tektro HD-M750, 4 piston; Brake Levers: Tektro HD-M750; Rotors: Tektro 180/180, 6-Bolt |
|---|
Cockpit & Contact Points
| Headset | Cane Creek Viscoset Upper / 40 Series Lower 1-1/8" |
|---|---|
| Handlebar | Surly Terminal |
| Stem | Kalloy 31.8 |
| Saddle | WTB Volt Medium |
| Seatpost | Tranz-X YSP15 Dropper, 120 mm travel |
Wheels & Tires
| Hubs | (F) Novatec 15 x 110 mm, 6-bolt, 36h / (R) Novatec 12 x 148 mm, 6-bolt, 36h |
|---|---|
| Rims | WTB HTZ Trail i35 27.5", TCS 2.0 |
| Spokes | 14 Gauge Stainless |
| Front Tire | Surly ExtraTerrestrial 27.5 x 2.5", 60 tpi, tubeless ready |
| Rear Tire | Surly ExtraTerrestrial 27.5 x 2.5", 60 tpi, tubeless ready |
| Wheel Size | 27.5" |
Size-specific frame data
Geometry
Manufacturer-published geometry normalized for consistent archival comparison. Effective top tube and reach remain separate measurements because they describe different aspects of fit.
| Measurement | Small | Medium | Large |
|---|---|---|---|
| Seat tube | 471 mm | 471 mm | 500 mm |
| Effective top tube | 570 mm | 610 mm | 650 mm |
| Head tube | 170 mm | 200 mm | 230 mm |
| Head-tube angle | 68° | 68° | 68° |
| Seat-tube angle | 74° | 73.5° | 73° |
| Chainstay / rear center | 535 mm | 535 mm | 535 mm |
| Wheelbase | 1201.4 mm | 1238.7 mm | 1275.5 mm |
| Bottom-bracket drop | 60 mm | 60 mm | 60 mm |
| Bottom-bracket height | 297.3 mm | 297.3 mm | 297.3 mm |
| Reach | 398.6 mm | 424.7 mm | 450.3 mm |
| Stack | 597.6 mm | 625.4 mm | 653.2 mm |
| Standover height | 695 mm | 732 mm | 745 mm |
| Fork offset / rake | 50 mm | 50 mm | 50 mm |
| Fork length / axle-to-crown | 417 mm | 417 mm | 417 mm |
| Crank length | 170 mm | 170 mm | 170 mm |
| Stem length | 60 mm | 70 mm | 80 mm |
| Handlebar width | 718 mm | 735 mm | 735 mm |
Geometry source: Manufacturer HTML geometry table ↗ Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.
Gallery
Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.