Stella Steel Mountain Bike

(this model is no longer in production)

The Stella Steel 29er is equally at home racing your local singletrack or decked out w/ bikepacking gear. The Stella Steel and Titanium are proven race winners at marathon, XC and Ultra-race events. The goal of the Stella steel is provide riders with a super smooth riding yet durable steel frame featuring the best materials and craftsmanship. Many frame customizations are available. The Stella is designed to be extremely compatible with a wide range of tire sizes, boost hub options and fork lengths. Frame only, complete and partial builds available

Ride Quality

  • Precise handling and excellent climb-ability. The Stella overtakes ledge ups and trail features with ease.

  • A balanced BB drop: Positioned to bring out the rest of the geometry and give clearance to pedal through rock gardens, climb with power and stay playful.

  • Supple where is counts: S-Bend seat-stays, sloping top tube and bent down tube. These choices help the bike track in the rough and dampen trail vibrations.

  • Stout chain-stays and CHUMBA Oversized Select Double Butted Tubing throughout yield large tube miters balanced for strength and a low frame weight

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Build Quality

  • Made in USA quality, built in house in Austin, TX.

  • CHUMBA Oversized Select Double Butted Tubing and PMW stainless steel sliding dropouts, mean this bike will exceed your expectations and provide years of reliable trail service. Oversized tubing yields larger tube miters for strength..

  • Clean thoughtful cable routing w/ stainless steel braze-ons.

  • Flawless frame miters, all tubes are heat sunk and argon purged when welded to prevent distortion and material thinning.

  • Machined head tube for tapered or straight forks.

  • Frame customizations now available

Stella Frame Specs and Compatibility

The Stella steel is designed to be extremely compatible with a wide range of tire sizes and drivetrains. Frames come with dropout inserts, rear axle and seatpost clamp.

  • Fork Travel: 120mm/100mm/or rigid options

  • Headset SHIS: ZS44 Upper/ EC44 Lower for Tapered or Straight

  • Suggested Stem Lengths: 40-100mm. 50-90mm is most popular

  • Hub Spacing: 148x12 Boost

  • PMW Sliding Dropout options: Geared, single speed or Rohloff, Thru axle

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

  • Max Tire Clearances:

    • 29 x 2.4” (in all dropout positions)

    • 29 x 2.6” (mid dropout and rearward))

    • 29 x 2.8" tires (many fit in dropout rear position on size M, L, XL)

    • 27plus x 2.8" (in all dropout positions M, L, XL, mid-rearward on size small)

  • Bottom Bracket: 73 English Threaded BSA

  • Chainring Clearance: 1x 34T oval or 36T round and 2x compatible w/select configs

  • Chainline: Boost (51/52mm)

  • Dropper Port: Stainless internal dropper port on non-driveside w/ rubber housing guide

  • Seatpost: Post 31.6mm / Clamp 35mm (comes with frame)

  • H20 Capacity: 3 bottles on Sizes M, L & XL. 2 bottles on S

  • Chainring/Chain-line: 1x 34T oval on Boost chain-line (51/52mm)

  • Seat Post: Post 31.6mm / Clamp 35mm

  • Dropper Port: Stainless internal dropper port on non-driveside w/ rubber housing guide

  • Cable Routing: Standard cable routing goes under the down tube via PMW bolt on cable guides and then onto the chain-stays.

  • Rack mounts: We offer Old Man Mountain racks, who makes a USA made thru-axle mounted rack that can hold up to 70lbs, it is more secure for the rack and goods and it better protects the frame then a traditionally mounted rack. We can provide these with the bike if interested. We can also add traditional rack mounts if desired.

Stella Steel Geometry Chart

Measurements with 29er 100mm fork. Standover is measured 90mm forward of Bottom Bracket.

Frame will fit 27+ x 3.0" or 29" x 3.0" on a 45mm rim

All frames can fit 2 water bottles. M, L, and XL fit 3.

Measurement SM MD LG XL
Effective Top Tube 585 605 625 645
Head Tube Angle 70° 70° 70° 70.5°
Head Tube Length 90 100 110 120
Seat Tube Angle 73° 73° 73° 72.5°
Seat Tube Length 15" 17" 19" 21"
Chainstay Length 435-455 435-455 435-455 435-455
Bottom Bracket Drop 51.5 51.5 51.5 51.5
Wheelbase 1081-1101 1101-1121 1120-1140 1130-1150
Standover Height 28.75" 30.25" 31.5" 33.5"
Reach 398 416 433 443
Stack 607 618 626 638
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