Specialized Stumpjumper 15 Comp Complete Mountain Bike 2025

Mountain bikes are built for tackling rough terrain with frames made of durable materials like aluminum or carbon fiber, ensuring stability and maneuverability. They feature suspension to absorb impacts from rocks, roots, and drops, providing a smoother ride.

Trail bikes are the quintessential “mountain bikes.” If you’re heading into the woods expecting to do it all on two wheels – climbing, technical sections, AND fun descents – you’re looking for a trail bike.

Engineered to tackle the most challenging terrain with enhanced comfort and control. Unlike hardtail bikes, full suspension bikes feature both front and rear suspension systems that allow the wheels to move independently from the frame.

Carbon is a composite frame material. Unlike metals, carbon is composed of fibrous strands woven into a grid and bonded with epoxy. Carbon is favored by many for its lightness and stiffness but its complexity in fabrication makes it the most expensive option.

The Fox 36 is the undisputed all-mountain champion. Lighter, stronger, faster — the 36 continues to dominate the all-mountain category.

Rhythm Series forks retain all the same features as Performance Series except they feature 6000 series aluminum upper tubes and two-position GRIP sweep with infinite adjust instead of three-position GRIP with detents.

The all-new Float answers the demands of the modern trail rider; a firm pedal platform for uphill efficiency and confidence-inducing, trail-hugging descent capability, all in a lightweight package.

Fox DPS Performance Series shocks have fewer adjustments than Performance Elite or Factory Series (no Open mode adjust tuning range), and feature a black anodized finish instead of Genuine Kashima Coat.

With quick lever access and a light, responsive lever action, Shimano's Rapidfire Plus SLX shift lever delivers smooth control out on the trail.

The SLX M7100 series of derailleurs deliver advanced shifting performance with decreased tension in the low gear position and an added bumper on the pulley cage. Larger 13T pulleys increase efficiency and chain management while compatibility with Shimano's 12-speed cassettes boosts range.

The SLX M7100 crank features an entirely new construction, using direct mount chainrings, special gear tooth profile for improved chain retention, and a 172mm Q-factor.

FEATURES

• Superior chain retention
  • Special MTB gear teeth profile improves chain engagement and retention
    • DYNAMIC CHAIN ENGAGEMENT+
• Rigid and lightweight design boosts trail-riding enjoyment
  • Hollow forged crank maximizes power transfer while limiting weight
    • HOLLOWTECH II
• Easier gearing than racing groupsets
• Q-factor: 172 mm
• Chainline: 52 mm

With its Beam Spider construction, the SLX M7100 cassette shaves weight while increasing Shimano's MTB gearing range another gear. Using their new Micro Spline freehub body and HYPERGLIDE+ tooth profile, these 10-51T cassettes deliver advanced shifting performance.

The M7100 chain provides enhanced chain retention thanks to an extended portion of the inner plate. The new chain features quick-link assembly and SIL-TEC treatment for extended offroad durability.

SRAM Maven Bronze features monstrous 18 and 19.5mm pistons driving 50% more power than Code. But best-in-class power means nothing unless you’re able to harness it. The Maven Bronze lever body houses Swinglink, which translates rider input for progressive power throughout the lever pull, maintaining SRAM’s signature ride feel. And because of a stiff 4-bolt caliper that sheds an incredible amount of heat, that feel remains consistent, so the last corner feels like the first corner. Maven Bronze features a Dark Polar Anodized finish, and tool-free Reach Adjust.

The X-Fusion Manic Dropper elects for a simpler design. Inside you'll find a closed cartridge that is both sealed and designed to be easily removable from the rest of the post. Simple construction aside, the action of this post feels super-dooper smooth, and far silkier than any dropper. Features internal cable routing.

At 30mm wide, these hookless alloy wheels are the perfect width for aggressive trail riding. They have sealed cartridge hubs with 32 spokes front and rear, built for light weight and very high strength.

The Butcher GRID TRAIL 2Bliss Ready T9 features a World-Cup proven aggressive tread design to bite and grip in any condition. Ramped and siped, the center tread blocks provide maximum traction and accurate steering. The sawtooth faced shoulder knobs offer a continuous biting edge for railing through corners.

• GRID TRAIL casing is a step up from GRID with more reinforcement, delivering better handling at lower pressures—all while increasing pinch flat protection by 15% and puncture protection by 30%.
• High-dampening GRIPTON® T9 compound rebounds slowly to grip and stick to the ground for total traction and control.

The Eliminator tire features a tread that combines an aggressive block design with a well-balanced tread pattern. Its transition knobs help bridge the traditional channel between center and shoulder knobs, making the Eliminator extremely predictable on soft to hardpack trails. It’s perfect for enduro and E-bikes where versatility and confidence are key.

• GRID TRAIL casing is a step up from GRID with more reinforcement, delivering better handling at lower pressures—all while increasing pinch flat protection by 15% and puncture protection by 30%.
• T7 GRIPTON® compound enhances rolling speed while still providing tons of grip.