Specialized Stumpjumper 15 EVO Expert AXS — Full Suspension Mountain Bike

Frame: FACT 11m carbon chassis and rear-end with Trail Geometry, SWAT Door integration, adjustable head tube angle, threaded BB, internal brake/dropper routing, 12x148mm dropouts, sealed cartridge bearing pivots, SRAM UDH compatible — 145mm of rear travel

Fork / Rear Shock: FOX FLOAT 36 Performance Elite fork with GRIP X2 damper (S1: 150mm travel, S2–S6: 160mm travel); FOX FLOAT X Performance Elite rear shock with Specialized GENIE Shock Tech, Ride Dynamics Trail Tune, 2-position lever, LSC/LSR adjustment

Drivetrain: SRAM GX Eagle AXS Transmission (electronic, wireless) with AXS POD Controller, GX Eagle 32t crankset, XG-1275 T-Type 12-speed 10-52t cassette, GX Eagle Transmission flattop chain

Brakes: SRAM Maven Silver 4-piston hydraulic disc, 200mm front rotor, 180mm (S1–S2) / 200mm (S3–S6) rear rotor

Wheels / Tyres: Roval Traverse hookless alloy rims (29", 30mm inner width) on DT Swiss 370 hubs with Sapim Force spokes; Butcher GRID TRAIL 29x2.4 front tyre, Eliminator GRID TRAIL rear tyre (27.5x2.4 on S1–S2, 29x2.4 on S3–S6)

Cockpit: Specialized 6000-series alloy handlebar (800mm/50mm rise on S3–S6), alloy Trail stem, Deity Lockjaw grips, PNW Loam dropper post with tool-less travel adjust

Weight: 14.61 kg (32 lb 3.4 oz), size S4

Standout feature: Six-way geometry adjustment via head tube angle, mixed-wheel (S1–S2) or full 29" (S3–S6) configurations, and SWAT 4.0 internal downtube storage

The Stumpjumper 15 EVO Expert AXS is built for the rider who wants a short-travel bike that doesn't back down on rough, technical trail — think laps on Hydraulink or the steeper lines around Okanagan Mountain Park, where GENIE's coil-like support and bottom-out resistance really show up. It's a strong match for intermediate to advanced riders who already know their way around a trail bike and want wireless SRAM shifting, adjustable geometry, and a dropper that won't hold them back on the way down. This is not an entry-level build — it rewards riders who are pushing pace and terrain.

Our team at Fresh Air will help you find the right fit in-store at both Kelowna locations. Stop by to work with one of our experienced staff members, or call 250-763-3425.

Before you hit the trail, our team will set sag on both the FOX 36 fork and FOX FLOAT X GENIE shock to your weight and riding style, and walk you through how the GENIE spring behaves differently than a standard air shock so you get the most out of it. We'll route and check the PNW Loam dropper post for smooth actuation, confirm your head tube angle setting matches how you want the bike to ride, and get your tyres set up tubeless at pressures suited to local trail conditions. Since this build runs SRAM's wireless AXS Transmission, we'll also pair the derailleur and controller and make sure the drivetrain is indexed correctly before you leave.

Drop into Fresh Air Pandosy (555 Groves Ave) or Fresh Air Dilworth (1656 Dilworth Drive), or book an appointment online.

Q1: What size Specialized Stumpjumper 15 EVO Expert AXS do I need?
Specialized sizes the Stumpjumper 15 EVO Expert AXS from S1 through S6 based on height and riding preference rather than a single number. For a precise fit, check the Specialized geometry chart linked above, or come into either Fresh Air location and our team will help you size up properly.

Q2: Is the Specialized Stumpjumper 15 EVO Expert AXS right for Knox Mountain or Hydraulink Trails?
Yes — with 145mm of GENIE-tuned rear travel, a 150–160mm FOX 36 fork, and aggressive geometry, the Stumpjumper 15 EVO Expert AXS is well suited to the technical climbs and descents found on Knox Mountain, Hydraulink Trails, and Okanagan Mountain Park.

Q3: How do I set up the suspension on the Stumpjumper 15 EVO Expert AXS for my weight and riding style?
Sag on both the FOX FLOAT 36 fork and FOX FLOAT X GENIE shock should be set based on your rider weight, with further fine-tuning through the fork's high/low-speed compression and rebound adjustments and the shock's 2-position lever. Our team can walk you through baseline settings and fine-tune from there based on how you ride.