Tunnel Select
Tunnel isn’t just a ride — it’s a challenge carved into the mountains above Santa Barbara. Rutted, raw, and relentlessly steep, it’s a trail that demands skill, commitment, and a bike built to deliver. It’s the kind of place that forges better riders — and better bikes. That ethos inspires the Stinner Tunnel line. Whether you’re just beginning your journey with the Select Series or pushing your performance with the Podium, these bikes are built with the same spirit: capable, purpose-driven, and ready for whatever lies ahead. Where it all begins. Where limits are tested.
Frameset Technical Specifications //
FRAME //
Material // Stinner Select Steel Tube Set
Finish // Durable Powder Coat
Dropouts // UDH Steel Dropouts
Drivetrain Compatibility // Mechanical 1x / SRAM AXS Eagle Transmission/Full Mount compatible
MAX Tire Clearance // 29 x 2.5"
MAX Chainring Clearance // 1x: 34t (55mm chainline)
Dropout Spacing // Boost 148 x 12mm
Rear Axle // 180mm - M12 x 1.0 - 15mm threaded portion
Brake Mount // Post Mount 160mm
MAX Rotor Size // 180mm
Brake Routing // External w/bolt-on and zip-tie guides
Seatpost Diameter // 31.6mm - Mechanical Dropper Compatible
Seatpost maximum insertion // Med: 205mm // M/L: 225mm // Large: 245mm // XL: 265mm
Seatpost Clamp Diameter // 34.9mm
Bottom Bracket // BSA 73mm wide shell
Headtube Diameter // 44mm Internal Top and Bottom
Headset Specs // Upper: ZS44/28.6 - Lower: EC44/40 (1.5 Tapered Steerer)
Mounts // 2 bottle cage mounts in front triangle - triple mount under down tube
FORK //
The Tunnel is designed around a 140mm travel suspension fork with a 551mm axle to crown measurement.
Build Kit Details //
FORK //
Suspension Fork // Rock Shox Pike Select 140mm, 29'er, BOOST 110x15, Charger RC, 44mm offset, Gloss Black
COCKPIT //
Stem // Race Face Aeffect R 35mm - 40mm length
Headset // FSA Orbit - Upper: ZS44/28.6, Lower: EC44/40
Handlebar // Race Face Aeffect R Riser Bar - 35mm clamp - 780mm width - 20mm rise
Grips // Race Face Getta Grip 33mm - Black/Black
Seatpost // Race Face Aeffect R Dropper 31.6mm // Medium and M/L: 150mm drop // Large and XL: 170mm drop
Dropper Lever // Race Face Turbine 1x
Seat Collar // Stinner Select 34.9mm
Saddle // WTB Silverado 265 Medium 142mm, Steel rails
Pedals // Not Included
DRIVETRAIN //
Bottom Bracket // SRAM DUB BSA 73mm MTB (55mm CL)
Crankset // SRAM Eagle 90 T-Type Wide - Medium and M/L: 165mm length // Large and XL: 170mm length
Chainring // SRAM Eagle 90 Direct Mount - 8 bolt - 32t
Chain // SRAM GX Eagle T-Type Flattop 12spd
Cassette // SRAM XS-1275 Eagle Transmission - 10/52t
Rear Shifter // SRAM Eagle 90 Trigger Shifter
Rear Derailleur // SRAM Eagle 90 T-Type 12spd - Full Mount
Front Brake // SRAM DB8 Stealth
Rear Brake // SRAM DB8 Stealth
Front Rotor // SRAM Centerline 6B - 180mm
Rear Rotor // SRAM Centerline 6B - 180mm
Charger // SRAM AXS Charger
Battery // SRAM AXS Battery
Hanger // N/A - Transmission
WHEELSET //
Front Wheel // DT Swiss M1900 Spline 29 - Tubeless, Boost 110x15mm, 28h, 6 Bolt
Rear Wheel // DT Swiss M1900 Spline 29 - Tubeless, Boost 148x12mm, 28h, 6 Bolt, XD Driver
Front Tire // Maxxis Assegai 29x2.5" - 3CT/EXO/TR/WT
Rear Tire // Maxxis Assegai 29x2.5" - 3CT/EXO/TR/WT
GEOMETRY CHART & FRAME DRAFTS //
| Geometry | M | M/L | L | XL |
| Stack | 644 | 655 | 666 | 677 |
| Reach | 447 | 460 | 480 | 500 |
| Top Tube Length, Horizontal | 628 | 644 | 668 | 692 |
| Head Tube Length | 96 | 108 | 120 | 132 |
| Head Tube Angle | 66° | 66° | 66° | 66° |
| BB Height* | 313 | 312 | 313 | 313 |
| BB Drop | 60 | 60 | 60 | 60 |
| Effective Seat Tube Angle | 76° | 75.8° | 75.7° | 75.5° |
| Front Center** | 758 | 775 | 800 | 825 |
| Chainstay Length | 430 | 430 | 430 | 430 |
| Wheelbase** | 1181 | 1199 | 1224 | 1249 |
| Standover Height 60mm forward of BB* | 771 | 788 | 804 | 820 |
| Seat Tube Length (center - top) | 420 | 440 | 460 | 480 |
|
*w/ 29 x 2.5" tires **w/ 44mm fork rake All Measurements are Static All Measurements in mm |
|
With a Complete //
All parts listed under the complete build kit specifications will be fully installed, tuned, and ready to ride*
*Some assembly will be required out of the box
Wheels // Will ship setup tubeless with sealant installed
Charger // SRAM AXS single battery charger
Documentation // Welcome to the Stinner Family
With a Frame //
Headset // Not Included - CLICK HERE for compatible headset options
Hanger // SRAM UDH
Rear Axle // Stinner Select UDH - 180mm x M12 x 1.0
Bottle Boss Bolts // QTY. 7 Stainless Bolts
Chainstay Protector // Clear Vinyl - Installed
Bolt-On Guides // QTY. 4 Stinner Select Cable guides - Triple
Zip Ties // QTY. 5 Small Zip Ties - Black
Seat Post Clamp // Stinner Select 34.9mm
Documentation // Welcome to the Stinner Family
NOTE // Frame saver will need to be applied to the inside of the frame before it is built up.
Time to get Rowdy
140mm Travel
The perfect amount of travel to make the Tunnel capable of hitting almost every line you can find.
Mechanical Shifting
SRAM Eagle 90
The Tunnel Select complete comes stock with the new, cable-actuated, SRAM Eagle 90 drivetrain. Featuring a robust full mount rear derailleur for worry free shifting on the trail.
Grip Matters
29 x 2.5" Tires
Plenty of tire clearance means the Tunnel is ready to tackle just about anything you can throw at it. The complete build comes stock with Maxxis tires.
Mile after Mile
No Fuss
We used modern industry standards on the Select Series to ensure you won't have any surprises when it comes time for maintenance. Nothing proprietary to hold you back.
MAde in the USA
Steel frame
The Refugio Select frame features a complete Columbus steel tube set. Experience why everyone agrees that steel is real.
Focus on the ride
Lifetime Warranty
Every Stinner frame is backed by a lifetime warranty against manufacture defects.