Specialized S-Works Stumpjumper 15 EVO — a returning champion with premium kit and a premium price

# Overview Stumpjumper 15 EVO returns as the defending group-test champion, updated into an EVO spec with 160 mm front and 145 mm rear travel. Specialized pairs a FOX 36 Factory fork with the new FOX FLOAT X Factory GENIE shock (with piggyback reservoir) to aim for coil-like traction and air-shock progression. The flagship S-Works model tested weighs 15.32 kg in size S4 and retails at €12,499, making it the priciest non-motorised bike in the comparison.

# Design and build The frame is full carbon across six sizes (S1–S6) and runs 29" wheels. Proportions and tube shaping are described as balanced and elegant, with neat internal routing and sealed unused ports. Specialized has added extensive protective films and a bolted dual-compound downtube protector. A bolted flap between the main frame and rear triangle reduces dirt build-up while preserving paint.

# Practical integrations Two standout integrations: the SWAT tool hidden in the steerer, which includes a spare chain link, and a large downtube storage compartment with a waterproof internal pouch. The downtube space fits an inner tube, tools and even a OneUp 100cc EDC pump. The flap and chainstay protector reduce chain-slap damage and grime. Adjustable geometry is available through headset cups and a flip chip in the chainstays to tune handling for trail or rider preference.

# Suspension, braking and drivetrain Front suspension is a FOX 36 Factory with GRIP X2 damper controlling 160 mm travel. Rear suspension uses the FOX FLOAT X Factory GENIE shock with a piggyback reservoir, designed to blend coil sensitivity with air-shock reserves. Shimano XTR brakes with 203 mm rotors front and rear provide strong stopping power. The drivetrain on the tested bike is electronic Shimano XTR Di2.

# What worked well

# Issues and annoyances Testers found a conspicuous amount of carbon dust inside the frame on the test bike. The internal storage mechanism lacks a second pouch for better organisation and the opening lever needs more grip. The chainstay underside could use additional protection. Torque markings on bolts are absent, making workshop work less straightforward.

# Positioning and value Specialized kept premium components and details to justify the S-Works price, but the bike is mid-pack in weight despite flagship spec. At €12,499 it is the most expensive non-electric entry in the group test, which raises the question of whether the combination of ride quality, integrations and finish offsets that price compared with rival offerings.

# Short verdict Stumpjumper lineage with refined suspension, smart storage, and strong protection. It remains a highly capable and well-specified trail bike, but riders should weigh the high cost and the mid-pack weight against features that matter most to them: suspension feel and integrated practicality.