Sendero Steel Mountain Bike
The Sendero is at home racing XC/Marathon courses and is a proven platform for ultra-racing. It’s our go-to bike for spirited after-work group rides and weekend all-day rides where you might encounter a wide range of terrains.
Input from our factory team and our passion for technical singletrack have led us to design a refined downcountry / trail capable hardtail. The Sendero is built to excel in the varied untamed trails most of us have access to. Inspired to unlock the rock gardens and ledge lines we find across Austin’s rugged mountain biking trails. If you go out of your way to ride the hard line, we made this bike for you. The Sendero stands out from other bikes in the category with a higher bottom bracket and steeper seat tube than many other options. The reach is optimized for precise steering and stable descents. The Sendero represents a balanced and versatile offering in the burgeoning downcountry category, or loaded up for rugged bikepacking adventures.
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The Sendero utilizes a short 420mm chain-stay & a long reach to position the rider to stick corners and pedal efficiently while keeping the bike incredibly playful.
Paired to the head tube and seat tube angles the design is made to confidently huck ledges and bomb descents.
A balanced Bottom Bracket: Positioned to bring out the rest of the geometry and give clearance to pedal through technical rock gardens, climb with power and stay flickable.
Smooth and predictable compliance from Chumba Oversized Select Double Butted Tubing, built of the best tubing available.
The Sendero steel is designed to unlock technical trail features, put a smile on your face and of course to SEND IT!
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Fabricated in the USA, with machined HT, threaded BB, and Sliding dropouts.
CHUMBA Oversized Select Double Butted Tubing and 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.
A custom bent seat tube brings together a short rear end, steep seat tube angle and maximum tire clearance.
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.
Many frame customizations are available.
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Now available in two tubesets! Our Chumba Oversized Select Double Butted Tubeset has always been trusted for trail riding, bikepacking. Prized for its value, dent resistance & balance of compliance/strength.
For those looking for a more race performance tubeset we offer a Velospec Heat Treated (USA made) Tubeset. Available in the frame customizations as an add-on. For lighter frame weight and increased performance characteristics. The tubing is air hardened at weld zones which increases its fatigue strength and resistance to external forces. While heat treatment adds strength, these tubes offer increased elongation % for a compliant ride. The stuff of magic? We think so.
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Why choose the double butted oval chainstay? (included in frame price)
Use this for the smoothest ride experience and value in the frame cost. The full tube is double butted and provides a supple ride quality. Fits a 2.6” tire in the middle of the sliding dropout.
Why choose your chainstay with the 3D Space Yoke? upgrade + $400
Use this for the most responsive ride quality. This works best for those who like to get rowdy, carry more weight on the bike or want the most performance out of every pedal stroke. Fits a 2.6” tire all the way forward in the sliding dropout. Available under frame customizations.
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The Sendero 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 120mm - 130mm travel. 44mm offset recommended.
Suggested Stem Lengths: 120mm travel 40 - 70mm, 130mm travel 35 - 65mm
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, SRAM Transmission, single speed or Rohloff, thru axle
Rear Axle: 148x12x1.5 thread pitch (170mm total length) (comes with frame)
Bottom Bracket: T47 73mm Threaded External. (note: if ordered before July 2024 then 73 English Threaded BSA)
Chainring/Chain-line: 1x 34T oval on Boost chain-line (51/52mm)
Seat Post: Post 31.6mm
Seat Post Clamp: 35mm (comes w/ frame)
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.
H20 Capacity: 3 bottles on Sizes XL, L, & M, 2 bottles on Size Small
Rack mounts: Optional customization to add mounts.
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)
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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
“All of our complete bikes are built with a custom selection of components. We pride ourselves on listening, understanding your riding goals & working with you to craft the perfect blend of components & customizations.”
Order your frame below, or request a free quote on a complete or partial build. Each frame is handmade to order. Color choices, frame customizations and component kits can be added at anytime before production begins.
Frame price includes many finish options.
Add a Fox Factory or Rockshox Ultimate fork and receive an additional $200 off
For Frame / Frameset orders we will contact you to add a bottom bracket and headset to your order.
Frame Customizations
After placing your frame or complete bike order, we will contact you to plan your customizations.
Customizations include HTL adjustments, internal routing, custom braze ons and more.
Frames come with internal dropper routing in the seat tube.
Sendero Steel Geometry Chart in 5 Sizes S - XL
With a 120mm Fork
| Measurement | S | M | M/L | L | XL |
|---|---|---|---|---|---|
| Suggested Rider | <5'7" | 5'7" - 5'9" | 5'9" - 5'10" | 5'11" - 6'1" | 6'2> |
| Suggested Stem Length | 32-50mm | 32-50mm | 32-50mm | 32-65mm | 32-65mm |
| Effective Top Tube | 596 | 620 | 634 | 645 | 670 |
| Head Tube Angle | 67.5° | 67.5° | 67.5° | 67.5° | 67.5° |
| Head Tube Length | 95 | 100 | 105 | 110 | 120 |
| Effective Seat Tube Angle | 74.8° | 74.4° | 74.4° | 74.4° | 74.6° |
| Seat Tube Length | 15.5" | 16.25" | 17.25" | 18.25" | 20.25" |
| Chainstay Length | 420-440 | 420-440 | 420-440 | 428-448 | 428-448 |
| Bottom Bracket Drop | 48 | 48 | 48 | 48 | 48 |
| Wheelbase | 1118-1138 | 1141-1161 | 1156-1176 | 1167-1187 | 1206-1226 |
| Standover Height | 29.5" | 30" | 30.8" | 31.5" | 33" |
| Reach | 417 | 439 | 451 | 461 | 488 |
| Front Center | 702 | 726 | 740 | 752 | 782 |
| Stack | 618 | 623 | 627 | 632 | 641 |
| Max Seatpost Insertion | 230 | 205 | 232 | 257 | 308 |
With a 130mm Fork
| Measurement | SM | MD | M/L | LG | XL |
|---|---|---|---|---|---|
| Suggested Rider | <5'7" | 5'7" - 5'9" | 5'9" - 5'10" | 5'11" - 6'1" | 6'2> |
| Suggested Stem Length | 32-50mm | 32-50mm | 32-50mm | 32-60mm | 32-60mm |
| Effective Top Tube | 598 | 623 | 636 | 647 | 672 |
| Head Tube Angle | 66.9° | 66.9° | 66.9° | 66.9° | 66.9° |
| Head Tube Length | 95 | 100 | 105 | 110 | 120 |
| Effective Seat Tube Angle | 74.6° | 74° | 74° | 74° | 74.2° |
| Seat Tube Length | 15.5" | 16.25" | 17.25" | 18.25" | 20.25" |
| Chainstay Length | 420-440 | 420-440 | 420-440 | 420-440 | 428-448 |
| Bottom Bracket Drop | 44 | 44 | 44 | 44 | 44 |
| Wheelbase | 1123-1143 | 1147-1167 | 1161-1181 | 1172-1192 | 1211-1231 |
| Standover Height | 29.7" | 30.2" | 31.1" | 31.8" | 33.2" |
| Reach | 413 | 433 | 444 | 454 | 481 |
| Front Center | 706 | 731 | 744 | 756 | 787 |
| Stack | 622 | 627 | 632 | 637 | 646 |
| Max Seatpost Insertion | 230 | 205 | 232 | 257 | 308 |
Axle to Crown (A2C) Fork Measurements
Fox 34 Stepcast 29er fork, 44mm Offset, 530mm Axle to Crown
Cane Creek Helm 130mm 29er fork, 44mm offset, 543mm Axle to Crown
Standover/Effective Seat Tube Angle
Standover is measured 90mm forward of the bottom bracket, using a 29x2.4 tire for reference.
Effective seat tube angle is calculated from average saddle heights and placements per size.
The range is roughly 1º in either direction of the effective angle based on your chosen saddle placement.
Ordering
The Sendero Steel 29er / 27plus is available as a frame only, frame set, in complete build kits, and partial builds. Custom component configurations can be quoted on request here: Chumba Custom
You can order a Sendero direct from Chumba over the website using the drop-downs on this page, over the phone, in person @ our Headquarters or from an approved Chumba Dealer. We welcome calls (512) 494-4944 and emails for immediate questions.