STELLA Titanium Mountain Bike

The STELLA Titanium 29er is our premiere XC and Endurance race hardtail. Made in the USA using our race driven oversized titanium tube set for the best blend of power transfer, trail compliance, and ride quality. With record setting wins at ultra-race events at Tour Divide, Stagecoach 400, & the Comstock Epic the Stella Titanium is a proven bike for covering vast distances quickly and comfortably. The Stella is designed to be extremely compatible with a wide range of tire sizes, hub options and fork lengths.

To illustrate this versatility, team rider Alexandera Houchin won the Women’s 2019 Tour Divide and then the CTR. On TD she set new records for single speed and the fastest women’s finish during the grand depart. She is the now first woman ever to win the Tour Divide race 2 years in a row. She rode the Stella Titanium as a rigid 29er ultra-race bike. Just a few weeks later she then swapped to a 120mm suspension fork and 27plus wheels to take first place on the 2019 Colorado Trail Race.

We have just updated the Stella Titanium with some new features that we feel further refine the already proven design. Scroll down to learn more.

2020 Stella Titanium Model Refinements

  • 10mm shorter chain-stays, 433mm, w/ our adjustable dropouts and Paragon Machine Works (PMW) inserts.

  • BSA 73mm English Threaded Bottom Bracket.

  • Covert internal dropper port.

  • Cleaner cable routing under the down tube via interchangeable bolt on guides that are 1x, 2x or single speed specific. Housing then goes onto the chain-stays (not pictured).

  • We lowered the total number of bosses for a cleaner look and now offer more customizations to add any additional ones you might need.

  • Custom forming at the down-tube and bottom bracket junction to further increase stiffness at the bottom bracket.

  • Option to add Di2 compatibility.

  • Pre-order this weekend and receive a free White Industries BSA Threaded Bottom Bracket and Headset, choose any color! Estimated to ship in 5 weeks! Complete and partial builds also available on request.

  • Still Made in USA!

Ride Quality

  • Our titanium has a faster return to its original position, yet similar dampening properties to steel. The result is a more efficient ride that is still extremely comfortable.

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

  • 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.

  • CHUMBA Oversized Select Tubing throughout yields large tube miters for strength yet a low frame weight of only 4 lbs.

  • Tucked chain-stays for a snappy ride that are also adjustable via sliding dropouts to maximize tire clearance or stability during endurance rides.

Designed for speed. Built to last. Destined to attain your goals

Designed for speed. Built to last. Destined to attain your goals

Build Quality

  • Made in USA quality

  • Custom tubing chosen per frame size. XL and L frames use a larger down-tube for the best tracking in rough terrain with these larger sizes. On the smaller M and S frames we run a size down the down-tube making more room in the main triangle for bottles without sacrificing strength.

  • Oversized Aerospace Titanium 3/2.5 Grade Tubing, 6/4 on the yoke and dropouts w/ Paragon Sliding Inserts

  • Clean thoughtful cable routing

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

Stella Titanium Frame or Build 


Pre-orders placed this weekend receive a free White Industries BSA BB and headset!

Sale on remaining 2019 frames for $1800

Frame only/ Build/ or Custom Component Frame Reservation?:
Add to Build

To customize the Stella Titanium use the drop downs below

Frame Customizations

Add custom weld-ons and more

Add to Build

Frame Finishes

Choose from a brushed finish or cerakote options

Add to Build

Decal Color Options

Choose from a wide range of colors

Add to Build

2020 Stella Titanium Frame Specs

  • Fork Travel: 120mm to 100mm Suspension and Rigid options

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

  • Suggested Stem Lengths: 50-100mm. 60-90mm is most popular

  • Hub Spacing: 148x12 Boost

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

  • Max Tire Clearances: 29 x 3.0" tires (up to 45mm rim) or 27plus x 3.0" (up to 50mm rim)

  • Bottom Bracket: 73mm BSA English Threaded on new 2020 models (available for pre-order), PF30 73mm on our remaining XL and Small frame inventory

  • Seatpost: Post 31.6mm / Clamp 35mm

  • Chainring Clearance: 1x up to a 36T and 2x compatible

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

  • Electronic Options: Compatible with Shimano Di2 and Sram AXS.


You can order a Stella direct from Chumba over the website, phone, in person @ our Headquarters or from an approved Chumba Dealer. We welcome calls (512) 494-4944 and emails for immediate questions.