Specialized Stumpjumper 15 Alloy - S4, Satin Cast blue / Dove Grey, 2025

Frameset

---

---

SWAT

---

SWAT internal downtube storage

---

---

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 Binder

---

Alloy, 38.6mm

---

---

Suspension

---

---

Rear Shock

---

X-Fusion 02 Pro RL, Ride Dynamics Trail Tune, rebound adjust, lockout S1:210x52.5mm, S2-S6:210x55mm

---

---

Fork

---

RockShox, Psylo Silver, Motion Control Damper, 15x110 axle, 44mm offset, S1:140mm of travel, S2-S6:150mm of travel

---

---

Brakes

---

---

Rear Brake

---

Shimano, BR-MT420, 4-piston caliper, hydraulic disc, S1-S2: 180mm, S3-S6: 203mm

---

---

Front Brake

---

Shimano, BR-MT420, 4-piston caliper, hydraulic disc, 203mm

---

---

Drivetrain

---

---

Chain

---

Shimano Deore, M6100, 12-speed

---

---

Crankset

---

Shimano Deore, M6120, 30T ring, 55mm chainline, S1-S3:165mm, S4-S6: 170mm

---

---

Cassette

---

Shimano Deore, M6100, 12spd w/Hyperglide+, 10-51t

---

---

Rear Derailleur

---

Shimano Deore, M6100, 12pd, Shadow Plus

---

---

Shift Levers

---

Shimano Deore, M6100, 12spd

---

---

Wheels & tires

---

---

Rear Tire

---

Eliminator, GRID TRAIL casing, GRIPTON® T7 compound, 2Bliss Ready, S1-S2: 27.5x2.3, S3- S6: 29x2.3"

---

---

Rear Hub

---

Alloy, sealed cartridge bearings, 12x148mm thru-axle, 28h

---

---

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

---

---

Spokes

---

Stainless, 14g

---

---

Inner Tubes

---

Standard, Presta valve

---

---

Front Tire

---

Butcher, GRID TRAIL casing, GRIPTON® T9 compound, 2Bliss Ready, 29x2.3"

---

---

Cockpit

---

---

Stem

---

Alloy Trail Stem, 35mm bar bore

---

---

Saddle

---

Bridge, Steel rails, S1-S2: 155mm, S3-S6: 143mm

---

---

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

---

Specialized Trail Grips

---

---

SeatPost

---

TranzX Dropper, remote SLR LE lever, 34.9, S1: 125mm, S2: 150mm, S3: 170mm, S4-S6: 200mm

---

---

Product details

---

---

Product ID

---

276239

---

---

Weight

---

---

Weight

---

16.57 kg (36 lb, 8.5 oz)

---

---

Weight Size

---

S4

Size chart

The sizes shown are our recommendations. These are approximate values as Specialized, CTM and GHOST each have specific frame geometries. The size of the bike's wheels also matters, so if in doubt about which size to choose, feel free to use our online chat or contact us on our helpline +421 947 974 140 .

Kids Bikes

wheel	age	height
12	2-4y	to 110 cm
16	4-5y	110- 120 cm
20	5-8y	120-135 cm
24	8-11y	135-145 cm

for Adults: wheel sizes 26, 28, 27,5 a 29

size	height
XXS	to 155 cm
XS	to 163 cm
S	to 170 cm
M	to 178 cm
L	to 185 cm
XL	to 193 cm
XXL	above 193 cm