2025 Specialized Stumpjumper 15 Comp Alloy

Overview

The 2025 Specialized Stumpjumper 15 Comp Alloy redefines what a trail bike can be. Built around an all-new M5 alloy chassis and featuring Specialized’s patent-pending GENIE air spring technology, it blends big-bike bump absorption with short-travel efficiency and playfulness.

With six-way geometry adjustment, SWAT storage integration, and Ride Dynamics–tuned suspension, the Stumpjumper 15 Comp Alloy is engineered for riders who want capability, traction, and complete personalization in one platform.

This bike is available for online purchase only.
Please allow up to 48 hours for order processing and shipping preparation.

Frame & Geometry

• All-new M5 Alloy frame

• SWAT downtube storage integration

• Honed, progressive trail geometry

• Six distinct geometry settings

• Adjustable head angle and bottom bracket height

• Compatible with full 29” or mixed-wheel setups

Designed for stability in rough terrain while maintaining climbing efficiency and playful handling.

Suspension

• Front: FOX FLOAT 36 Rhythm – GRIP damper

• Rear: FOX FLOAT Performance with GENIE technology

• 145mm rear travel

GENIE Air Spring Technology

• Coil-like traction through the bump zone

• Progressive air spring bottom-out control

• Independent mid-stroke and end-stroke tuning

• 39% fewer bottom-outs vs standard air springs

• 57% improved traction compared to traditional air-sprung setups

Drivetrain

• Shimano SLX performance drivetrain

• Durable, trail-ready shifting

Brakes

• TRP Trail EVO 4-piston brakes

• Powerful, consistent stopping performance

Wheelset

• Specialized alloy wheels

• Sealed cartridge bearings

• Built for durability and aggressive trail riding

Dropper Post

• X-Fusion Manic dropper post

• Reliable on-trail adjustability

Use Category

• Trail

Why It Matters

The Stumpjumper 15 Comp Alloy combines advanced suspension innovation, fully adjustable geometry, and a durable alloy frame to create one of the most customizable trail bikes available. GENIE technology delivers enhanced traction and bottom-out control, allowing riders to push harder while maintaining confidence and efficiency.