Name: Specialized Stumpjumper Alloy 29" Mountain Bike 2022 - Trail Full Suspension MTB
Brand: Specialized
Rating: 5 (11 reviews)

The Specialized Stumpjumper Alloy brings all of the new, lust-worthy features of the Stumpjumper-like new suspension kinematics and geometry-into a full-alloy package that's both lightweight and extremely durable. Top it off with a no-fuss SRAM SX 12-speed groupset and you have the perfect ride for your next trail adventure.

Key Features:

Alloy frame with dialled trail bike geometry
X-Fusion O2 Pro RL Shock controls the 130mm of rear wheel travel
RockShox 35 Silver fork offers 140mm of plush suspension travel
SRAM SX Eagle 1x12 speed drivetrain offers a very wide range of gears
29” wheels for fast rolling performance
Colours: Satin Black/Smoke, Satin Blaze/Black
Sizes: S1, S2, S3, S4, S5, S6 (see sizing tab for more info)
The Specialized Stumpjumper Alloy is available with 0% APR finance

Specialized Stumpjumper Review

THE TRAIL BENCHMARK

When we set out to design the all-new Stumpjumper, we pursued some hefty goals. We went after the lightest-possible weight that sacrifices nothing to durability, a stiff chassis that corners on rails, and a geometry that everyone can enjoy, all with the best suspension kinematics we know how to design. Turns out, you can have your cake and eat it too with the new Stumpjumper.

130MM OF TRAIL-TAMING TRAVEL

All the travel in the world is useless without the proper kinematics, which is why we kept it at the forefront of the new Stumpjumper design. With the learnings from the suspension design on the Enduro, and over 1,000 hours of field and suspension lab development, we’ve greatly improved the pedalling performance, all while creating the capable, efficient, lively feelings that you long for. We increased anti-squat, so the suspension better-resists pedal bob and then, we further-improved bump performance on square-edge hits. Bottom line? The all-new Stumpjumper descends with complete control yet climbs with ease.

PROGRESSIVE GEOMETRY

The S-Sizing geometry of the new Stumpjumper hits the progressive sweet spot. Long, low, slack, a short offset fork, a steeper seat tube angle—they’re all the talk of the town because they make your ride better. With Flip Chip adjustability you’re able to further fine-tune your fit, ensuring that your new Stumpjumper performs flawlessly on whatever terrain you choose.

RIDER-FIRST ENGINEERED™

Rider-First Engineered™ frames use a size-specific approach to ride characteristics that ensures every frame performs flawlessly. So, whether you’re a Grom riding an S1, or in need of the lengthy S6, you’ll experience the same ride characteristics—on-rail cornering and balanced front and rear stiffness.

All Tredz bikes are:

Fully built & ready to ride
Fully checked & tested by Cytech qualified mechanics
Available with 0% APR finance on any basket over £99
UK price match promise
365 day no hassle returns
Free delivery in the UK Mainland on a date that suits you

In the box with every Tredz bike is:

Free Tredz 9 key trail tool
Free Tredz pedal spanner
Free basic pedals
Tredz drawstring kit bag
16 point quality control check sheet
Basic bike setup instructions
Free Cycle Plan insurance voucher

Occasionally, without notice, manufacturers change product design and/or specifications.

Specialized Stumpjumper 2022 Size Chart

Size	Height (cm)	Height (inches)
XS – S1	150 – 160	4’11” – 5’3”
S – S2	157 – 173	5’2” – 5’8”
M – S3	165 – 180	5’5” – 5’11”
L – S4	173 – 188	5’8” – 6’2”
XL – S5	178 – 193	5’10” – 6’4”
XXL – S6	188 - 203	6’2” – 6’3”

Find your S Size

Determining your S-Size is easy. If you rode a Medium before, then S-3 will be your equivalent size. But if you want a more nimble ride, you should drop down to an S2. Want a bike that’s more stable at speed? Bump up to an S4. Following are examples of three riders, all 5’8” (1.73m), who chose three different sizes.

Stumpjumper S size examples

Specialized Stumpjumper 2022 Geometry Charts

	S1	S2	S3	S4	S5	S6
Crank Length	165mm	170mm	170mm	170mm	170mm	175mm
Stem Length	40mm	40mm	50mm	50mm	50mm	50mm
Handlebar Width	780mm	780mm	780mm	780mm	780mm	780mm
Wheelbase	1152mm	1175mm	1200mm	1228mm	1268mm	1302mm
Chainstay Length	432mm	432mm	432mm	432mm	442mm	442mm
Front Centre	724mm	746mm	770mm	800mm	829mm	863mm
Stack (Low BB)	614mm	613mm	622mm	632mm	641mm	650mm
Seat Tube Length	385mm	385mm	405mm	425mm	445mm	465mm
Bike Standover Height	730mm	734mm	744mm	749mm	757mm	757mm
Headtube Length	95mm	100mm	110mm	120mm	130mm	140mm
Headtube Angle (Low BB)	65°	65°	65°	65°	65°	65°
Min Seatpost Insertion	80mm	80mm	80mm	80mm	80mm	80mm
Max Seatpost Insertion	220mm	220mm	240mm	260mm	280mm	300mm
Headtube Angle (High BB)	65.5°	65.5°	65.5°	65.5°	65.5°	65.5°
Seatpost Length	100 mm	125 mm	150 mm	170mm	170 mm	190 mm
Saddle Width	155mm	155mm	143mm	143mm	143mm	143mm
Trail (Low BB)	126mm	126mm	126mm	126mm	126mm	126mm
Trail (High BB)	123mm	123mm	123mm	123mm	123mm	123mm
BB Drop (High BB)	40mm	35mm	35mm	35mm	35mm	35mm
Top-Tube Length (Horizontal)	563mm	583mm	605mm	632mm	660mm	692mm
BB Height (High BB)	335mm	340mm	340mm	340mm	340mm	340mm
BB Drop (Low BB)	47mm	42mm	42mm	42mm	42mm	42mm
Stack (High BB)	610mm	609mm	618mm	627mm	636mm	646mm
BB Height (Low BB)	328mm	333mm	333mm	333mm	333mm	333mm
Fork Rake/Offset	44mm	44mm	44mm	44mm	44mm	44mm
Seat Tube Angle (High BB)	76.5°	76.5°	76.5°	76.5°	76.5°	76.5°
Reach (Low BB)	410mm	430mm	450mm	475mm	500mm	530mm
Seat Tube Angle (Low BB)	76°	76°	76°	76°	76°	76°
Fork Length (Full)	550mm	550mm	550mm	550mm	550mm	550mm
Reach (High BB)	415mm	435mm	455mm	480mm	505mm	535mm

Frame	Alloy chassis and rear-end, asymmetrical design, 29 Trail Geometry, horst pivot BB adjustment, threaded BB, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 130mm of travel
Fork	RockShox 35 Silver, Solo Air, 44mm offset, rebound adjust, TurnKey lockout, 15x110mm Boost™ Maxle® Lite thru-axle, 140mm of travel
Rear Shock	X-Fusion 02 Pro RL, Rx Trail Tune, rebound adjust, lockout S1:190x42.5mm, S2-S6: 190x45mm
Stem	Alloy Trail Stem, 35mm bar bore
Bars	Specialized, 6061 alloy, 6-degree upsweep, 8-degree backsweep, 30mm rise, 800mm width
Front Brake	Tektro Gemini Comp, hydraulic disc, resin pad, 200mm
Rear Brake	Tektro Gemini Comp, hydraulic disc, resin pad, 180mm
Rear Mech	SRAM SX Eagle, 12-speed
Shifters	SRAM SX Eagle, trigger, 12-speed
Speed	12
Front Tyre	Butcher, GRID casing, GRIPTON® compound, 29x2.3"
Rear Tyre	Purgatory, GRID Casing, GRIPTON® compound, 29x2.3"
Seat Post	TranzX dropper, 34.9mm, XS-S: 100mm, M: 120mm, L/XL: 150mm Travel
Saddle	Body Geometry Bridge Saddle, steel rails
Chainset	SRAM SX Eagle, DUB, S1:165mm, S2-S5: 170mm, S6: 175mm, 30T
Chain	SRAM SX Eagle, 12-speed