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Specialized · MY 2025

Stumpjumper 15 Alloy - Shimano Deore, RockShox/X-Fusion

72,890 CZK

65,490 CZK

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Weight: 16.57 kg
Motor: Not stated
Battery: Not stated
Travel front/rear: — / 145 mm

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measurable advantage weaker value difference without a verdict

Show differences only

There are no differences in the published specifications: both bikes have identical values for every compared item.

Specifications	Specialized Stumpjumper 15 Alloy - Shimano Deore, RockShox/X-Fusion
Frame
Frame	M5 Alloy chassis and rear-end, Trail Geometry, SWAT™ Door integration, head tube angle adjustment, threaded BB, internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, SRAM UDH compatible, 145mm of travel
Seat clamp	Alloy, 38.6mm
Suspension
Forks	RockShox, Psylo Silver, Motion Control Damper, 15x110 axle, 44mm offset, S1:140mm of travel, S2-S6:150mm of travel
Rear shock	X-Fusion 02 Pro RL, Ride Dynamics Trail Tune, rebound adjust, lockout S1:210x52.5mm, S2-S6:210x55mm
Rear travel	145 mm
Brakes
Front brake	Shimano, BR-MT420, 4-piston caliper, hydraulic disc, 203mm
Rear brake	Shimano, BR-MT420, 4-piston caliper, hydraulic disc, S1-S2: 180mm, S3-S6: 203mm
Motor
Drivetrain	Shimano Deore, M6100, 12spd
Rear derailleur	Shimano Deore, M6100, 12pd, Shadow Plus
Cassette	Shimano Deore, M6100, 12spd w/Hyperglide+, 10-51t
Chain	Shimano Deore, M6100, 12-speed
Crankset	Shimano Deore, M6120, 30T ring, 55mm chainline, S1-S3:165mm, S4-S6: 170mm
Wheels and tyres
Rims	Specialized Alloy, Tubeless Ready, 29mm internal width, 28h, Front: 29, Rear: S1-S2: 27.5, S3- S6: 29
Front hub	Alloy, sealed cartridge bearings, 15x110mm thru-axle, 28h
Rear hub	Alloy, sealed cartridge bearings, 12x148mm thru-axle, 28h
Spokes	Stainless, 14g
Front tyre	Butcher, GRID TRAIL casing, GRIPTON® T9 compound, 2Bliss Ready, 29x2.3"
Rear tyre	Eliminator, GRID TRAIL casing, GRIPTON® T7 compound, 2Bliss Ready, S1-S2: 27.5x2.3, S3- S6: 29x2.3"
Inner tubes	Standard, Presta valve
Cockpit and contact points
Stem	Alloy Trail Stem, 35mm bar bore
Handlebars	Specialized, 6000 series alloy, 6-degree upsweep, 8-degree backsweep. S1-S2: 780 width, 20mm rise: S3-S4: 800 width, 30mm rise: S5-S6: 800 width, 40mm rise
Grips and bar tape	Specialized Trail Grips
Saddle	Bridge, Steel rails, S1-S2: 155mm, S3-S6: 143mm
Seatpost	TranzX Dropper, remote SLR LE lever, 34.9, S1: 125mm, S2: 150mm, S3: 170mm, S4-S6: 200mm
Accessories
SWAT	SWAT internal downtube storage
Weight
Weight	16.57 kg
Weight for size	S4

Same size, fair comparison

Geometry by size

Geometry differences only · on

Geometry on the bike Hover over a table row — or tap it — and the dimension is drawn on the bike.

There are no differences for the selected sizes: their geometry is identical.

Dimension	Stumpjumper 15 Alloy - Shimano Deore, RockShox/X-Fusion S4
	170mm
Handlebar width mm	800mm
	40mm
Šířka sedla	143mm
	200mm
	640mm
	475mm
	125mm
	64.5°
	337mm
	38mm
	130mm
	561mm
	44mm
	812mm
	435mm
	1244mm
	624mm
	745mm
	425mm
	76.5°
	780mm
	255mm
	80mm

The first bike is the reference for the sign of each difference. Green and red are used only where the direction is meaningful: lower weight and higher published electric motor output. Dimensions, travel, capacity, crank length and price are differences without an automatic verdict. “—” means the manufacturer has not published the value. We show weights in kilograms; the manufacturer’s values in pounds are not displayed.

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Stumpjumper 15 Alloy - Shimano Deore, RockShox/X-Fusion

Geometry by size

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