• Surly Grappler bike Sage Green color side view
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Grappler

Grappler

⚠️ WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

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A Trail Bike Tailored for Drop Bars

Off-road enthusiasts have been Frankensteining drop bars onto trail bikes for decades, so we designed the Grappler to scratch that itch with a little more precision. Engineered first and foremost around a stable and comfortable drop-bar hand position, its trail-ready geo provides a spirited ride on mixed terrain.

Cleared for girthy tires and decorated with an array of mounts for hauling your daily provisions and overnight gear, the Grappler is ready to take you and your paraphernalia down that overgrown fire road for an extrasensory experience. There’s nothing to be afraid of. Probably.

  • Featuring Surly’s versatile Gnot-Boost spacing, allowing riders to run 142mm or Boost 148mm rear hubs; thru-axles; stealth dropper post routing; non-suspension corrected
  • Custom dropouts ready to run single-speed or internally geared hub setups
  • Seatstay-mounted bottle bosses, plus three-pack mounts at the top and bottom of the down tube
  • Clearance for 27.5 x 2.8” or 29 x 2.1" tires (with or without fenders)

Specifications

Geometry

Geometry Diagram
SIZE XS SM MD LG XL
Rider Height 1.42m+ 1.52m+ 1.65m+ 1.75m+ 1.85m+
Reach 381.0 405.0 420.0 444.0 458.0
Stack 585.0 604.0 623.0 641.0 660.0
Head Tube Angle 69.5° 69.5° 69.5° 69.5° 69.5°
Head Tube Length 160.0 180.0 200.0 220.0 240.0
Seat Tube Length 316.0 386.0 437.2 488.0 539.0
BB Drop 50.0 50.0 50.0 50.0 50.0
Wheelbase 1057.0 1088.0 1109.0 1140.0 1162.0
Chainstay Length 425.0 425.0 425.0 425.0 425.0
Top Tube Length, Effective 560.0 590.0 610.0 640.0 660.0
Seat Tube Angle 73.0° 73.0° 73.0° 73.0° 73.0°
Standover Height 719.0 762.0 796.0 830.0 863.0
Stem Length 60 or 70 60 or 70 60 or 70 60 or 70 60 or 70
Stem Angle 6.0° 6.0° 6.0° 6.0° 6.0°
Handlebar Width 400 420 440 460 480
Crank Length 170 170 175 175 175
Fork Length 420 420 420 420 420
Fork Rake 50.0 50.0 50.0 50.0 50.0

*Standover is measured from the top of the TT, at the center, with a tire measuring approximately Ø714mm

Frame Specs

  • Frame Construction: 100% Surly Chromoly Steel frame, Natch tubing, double-butted main triangle, TIG welded, E.D. coated
  • Fork Construction: 100% Surly Chromoly Steel fork, Natch tubing, double-butted tapered fork blades, TIG welded, E.D. coated
  • Rear Dropout Configuration: Horizontal slotted with optional vertical dumpout
  • Rear Hub Spacing: "Gnot-Boost" 145mm; 12 x 142mm or 12 x 148mm (Surly axle included); 10 x 135mm with Surly 10/12 Adapter Washers (not included)
  • Front Hub Spacing: 15 x 110mm (Surly axle included)
  • Rear Brake: Disc - 51mm I.S. (203mm max rotor)
  • Front Brake: Disc - 51mm I.S. (203mm max rotor)
  • Headtube: Ø34mm
  • Steerer Tube: Ø28.6mm
  • Crown Race: Ø30mm (1-1/8")
  • Stock Headset Upper (S.H.I.S): EC34 or ZS34
  • Stock Headset Lower (S.H.I.S): EC34
  • Seat Collar: 33.1mm
  • Seatpost: Ø30.9mm
  • Front Derailleur (Clamp): High direct mount top-pull (Ø34.9mm) 26mm offset adapter (not included) for 142 or 135mm rear hub spacing 29mm offset adapter (not included) for 148mm rear hub spacing
  • Max Chainring (CL) [3]: 1x (mtn): 36T; 2x (mtn): 36/26T; 1x (Boost): 38T; 2x (Boost): 39/32T
  • Bottom Bracket: 73mm BSA, threaded
  • Tire Clearance Frame [1]/[2]: 27.5 x 3” (27.5 x 2.8” with fender); 29 x 2.1–2.5” with or without fender (2.1” clearance with wheel all the way forward; 2.5” clearance with wheel all the way back in dropout)
  • Tire Clearance Fork [1]: 27.5 x 2.8” (27.5 x 2.6” with fender); 29 x 2.2” (29 x 2.0” with fender)
  • Rigid Fork Spec: 420 x 50mm
  • Design Suspension Fork Length [4]: N/A
  • Max Suspension Fork Length [4]: 420mm
  • Bottle Mounts Frame: 3-pack mounts on upper and lower downtube; seat tube bottle mounts on frame sizes S–XL
  • Bottle Mounts Fork: 3-pack mounts on each fork blade
  • Rack Mounts Frame: Yes (upper and lower threaded)
  • Rack Mounts Fork: Yes (upper and mid-blade threaded)
  • Fender Mounts Frame: Yes
  • Fender Mounts Fork: Yes
  • Other Features: Internal dropper post routing

Documents

Blog posts

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  • Steel Yourselves. The Surly Grappler Is Here

    Steel Yourselves. The Surly Grappler Is Here

    Surly Bikes Presents Grappler Grappler Is Our Dedicated Drop-Bar Trail BikeWe built Grappler for quick-and-dirty bikepacking trips — weekend excursions, weeknight romps, and spontaneous off-road escapes. We built it for...

    Steel Yourselves. The Surly Grappler Is Here

    Surly Bikes Presents Grappler Grappler Is Our Dedicated Drop-Bar Trail BikeWe built Grappler for quick-and-dirty bikepacking trips — weekend excursions, weeknight romps, and spontaneous off-road escapes. We built it for...

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