• Chumba Custom Tubing: Built with Made In USA Velospec Elite HT tubing available.

• The SLACKR stands out from other bikes in the long travel hardtail category with it's short adjustable chainstays and pedal forward seat tube angle.

• This isn't another long travel park bike disguised as a trail hardtail. Our take on trail geometry positions the rider to be in a powerful all day pedaling position. This is accomplished through careful planning of reach and seat tube angles.

• Designed to inspire confident play on the trail while the lightweight frame encourages you to ride longer.

• Strong stainless steel PMW adjustable sliding dropouts and a 428mm - 448mm chainstay length offers 20mm of wheelbase adjustment fine tuning the bikes feel.

• The reach is optimized for precise steering with stem lengths between 35mm and 60mm.

• A balanced bottom bracket drop, positioned to bring out the rest of the geometry, gives clearance to pedal through technical rock gardens while also hooking up in cornering.

• Fabricated in the USA, using our custom blend of USA-made Velospec ELITE head-treated tubing, and USA-made PMW HT, threaded BB, and Sliding dropouts.

• Chumba Custom Tubing means this bike will exceed your expectations & provide years of reliable trail service. We create a frame that is tuned to you.

• Paragon Machine Works stainless steel sliding dropouts for use with geared or singlespeed drivetrains.

• Comes with our trusted oval chainstays for strength and a smooth ride.

• Or customize and add our 3-D Space Yoke chainstay yoke designed in house. Shaped for maximum strength & crank/mud/tire clearance. FEA strength tested.

• S-bend seat-stays offer the perfect blend of compliance, traction & strength.

• A custom bent seat tube brings together a short rear end, steep seat tube angle & maximum tire clearance.

• Clean thoughtful cable routing w/ custom options.

• Flawless frame miters and precision welds. All tubes are heat sunk and argon purged when welded to prevent distortion and material thinning.

• Machined head tube for tapered or straight forks.

The SLACKR mountain bike is designed to be extremely compatible with a wide range of tire sizes, hub options and fork lengths. Frames come with dropout inserts, rear axle and seatpost clamp.

Fork Travel: Optimized for 150mm - 140mm travel suspension forks. 44mm offset recommended.

Suggested Stem Lengths: 35-50mm

Frame Weight: Right around 5.5 lbs

Headset S.H.I.S.: ZS44 Upper/ EC44 Lower for 1.5” Tapered or 1 1/8” Straight Forks

Hub Spacing: 148x12 Boost

PMW Sliding Dropout Options: Geared, single speed, SRAM Transmission (your choice of inserts comes w/frame)

Rear Axle: 148x12x1.5 thread pitch (170mm total length) (comes with frame)

Max Tire Clearances: 2.6” on a 36mm rim

Bottom Bracket: 73mm Threaded External Cup T47

Chainring max/Chain-line:

Oval Chaintstays = 1× 34T oval or 36T round on 51/52mm Boost chain-line, 55mm for SRAM Transmission

3-d Space Yoke = 1x 36T oval or 38T round on 51/52mm Boost chain-line, 55mm for SRAM Transmission

Seat Post: Post 31.6mm, can be shimmed for smaller posts

Seat Post Clamp: 34.9mm (comes w/frame)

Dropper Port: Reinforced stainless dropper port on non-driveside w/ silicone housing guide

Cable Routing: Standard cable routing goes under the down tube via PMW bolt on cable guides and then onto the chain-stays. (or options for custom routing)

H20 Capacity: 3 bottles on Sizes XL, L, & M, 2 bottles on small (or options for less)

Rack mounts: Old Man Mountain racks - a USA made thru-axle mounted rack that can hold up to 70lbs. It is more secure for the rack and cargo, and it better protects the frame than a traditionally mounted rack.

• With many colors to choose from you can make your bike standout or go stealth.

• Custom options available by request.

• You do not need to know your color to place a frame order and get fabrication started, we can add it later.

• View Frame colors here

• View Graphics colors here