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The Specialized Stumpjumper 15 Alloy is a trail-taming full suspension MTB with 145mm travel, adjustable geometry, and Deore 12-speed for all-terrain control.
The Specialized Stumpjumper 15 Alloy is a trail-taming full suspension MTB with 145mm travel, adjustable geometry, and Deore 12-speed for all-terrain control.
Specialized

Specialized Stumpjumper 15 Alloy Full Suspension Mountain Bike 2025 in Cast Blue/Dove Grey

£2,469.00 £2,750.00 10% off
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With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
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Hassle free returns

In the unlikely event that you are not satisfied with your purchase please feel free to return your items within 90 days of the purchase date for a full exchange or refund. Any item (excluding food, underwear or e-gift vouchers) can be returned to us for any reason within 90 days, provided that the item has not been used or fitted and is returned in its original packaging with valid proof of purchase.

It is recommended that you use a recorded delivery service or return to a store to ensure your items are received by us. We cannot assume responsibility for items that are lost in transit back to us.




Terms & Conditions

Items must be returned in their original packaging and unused. Refunds will be issued once the product(s) have been received and inspected.

Click & Collect customers can buy with confidence knowing that they can review the item before deciding whether it is right for you before leaving the store. Should you decide it's not right for you, it can be conveniently exchanged or refunded straight away, or you still have up to 90 days to return it if you are still unsure.

Please note:
1. If the items we have sent you are faulty, damaged or not as we described, we will cover the cost of collection and the delivery of the correct item.

2. If we have delivered the correct bike but upon inspection, you decide the bike is not the one for you, we will charge you £50 for collection (£100 from Northern Ireland). If you do not have the original box in usable condition, we will charge you an additional £15 to provide one.

Refunds will be processed using the same method of payment used for the original purchase. Credit & debit card refunds must be made to the card used for the original purchase.

We are unable to offer a refund without a valid proof of purchase.

Specialized Stumpjumper 15 Alloy Full Suspension Mountain Bike 2025 in Cast Blue/Dove Grey

Season:2025Sale

Brand:Specialized

Code:276239 93325-77

Stumpjumper 15 Alloy is here to obliterate every trade-off in the trail game. Devour bumps like a big bike? Check. Short-travel control, playfulness, and efficiency? Double check. How about a heaping helping of personalization to make it perfect for the only rider who really matters—you? Check, check, check.

As the quintessential trail bike, Stumpjumper 15 Alloy balances efficiency and optimal bump force management. For the anti-squat on Stumpjumper 15 Alloy, we struck a balance between the previous Stumpjumper and Stumpjumper EVO, as both had excellent pedalling characteristics.

This bike’s geometry delivers big bike capability when you need it, a nimble feel in tight sections, and lively, efficient climbing manners. The generous cockpit centres you on the bike, optimizing traction and corner control. The low bottom bracket, slack head tube angle, and optimized fork offset keep things stable in the rough.

The Stumpjumper 15 Alloy seamlessly integrates benchmark geo adjustability, making it the most personalizable trail bike ever. Six distinct geometry settings allow you to hone performance for any style and any terrain. The head angle and bottom bracket can be fine-tuned for stability or clearance.

We can make a frame as stiff as we want, but there’s such a thing as too stiff. To be one with the bike requires engineered compliance in the frame. Specialized engineered the M5 Alloy chassis—front end, rear end, and the link between them—as a single unit that hits the stiffness target they established for trail riding.

Key Features and Benefits:

  • Built to be Relentless:Designed to endure years of hard riding, and backed by the best support and programs to keep you on the trail.
  • RockShox Psylo Silver Fork:With Motion Control Damper.
  • Carry it All:SWAT on Stumpjumper 15 elevates downtube storage.

Full Specification:

  • 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
  • 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
  • Number of Gears:12
  • Gear Shifters:Shimano Deore, M6100, 12spd
  • Chainset:Shimano Deore, M6120, 30T ring, 55mm chainline, S1-S3:165mm, S4-S6: 170mm
  • Chainrings:30T
  • Rear Cassette:Shimano Deore, M6100, 12spd w/Hyperglide+, 10-51t
  • Chain:Shimano Deore, M6100, 12-speed
  • Front Derailleur:N/A
  • Rear Derailleur:Shimano Deore, M6100, 12pd, Shadow Plus
  • Bottom Bracket:Shimano Threaded
  • Pedals:Not supplied:Shop pedals here
  • 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
  • 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"
  • Brakes:Front: Shimano, BR-MT420, 4-piston caliper, hydraulic disc, 203mm Rear: Shimano, BR-MT420, 4-piston caliper, hydraulic disc, S1-S2: 180mm, S3-S6: 203mm
  • 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
  • Handlebar Grips:Specialized Trail Grips
  • Stem:Alloy Trail Stem, 35mm bar bore
  • 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
  • SWAT:SWAT internal downtube storage
  • Weight:S4: 16.57 kg (36 lb, 8.5 oz)
Manufacturers reserve the right to change specifications without notice based on availability at the point of assembly.

Size Guide for Specialized Stumpjumper 15

Tip:
Size down for More Manoeuvrability
Size up for More Stability
Frame SizeHeight (cm)Height (Inches)
S1 - XS150 - 1604'11" - 5'3"
S2 - S157 - 1735'2" - 5'8"
S3 - M165 - 1805'5" - 5'11"
S4 - L173 - 1885'8" - 6'2"
S5 - XL178 - 1935'10" - 6'4"
S6 - XXL188 - 2036'2" - 6'8"

Geometry Information for Specialized Stumpjumper 15 Alloy

S1S2S3S4S5S6
Crank Length165165165170170170
Handlebar Width780780800800800800
Stem Length404040404040
Saddle Width155155143143143143
Seatpost Length125150170200200200
Stack608618627640654667
Reach400425450475500530
Headtube Length95100110125140155
Headtube Angle64.564.564.564.564.564.5
BB Height334337337337337337
BB Drop413838383838
Trail129130130130130130
Fork Length (full)551561561561561561
Fork Rake/Offset444444444444
Front Center720751780812843879
Chainstay Length430432435435445445
Wheelbase114911811213124412851322
Top-tube Length (horizontal)541573595624647677
Bike Standover Height738751745745745751
Seat Tube Length385385405425445465
Seat Tube Angle78777776.576.576.5
Saddle Height for Effective ST Angle645690735780825870
Max Seatpost Insertion245245255255285285
Min Seatpost Insertion808080808080

Warranty Information for Specialized Bikes and Wheels

Policy TermCoverage for Registered ProductsCoverage if Not Registered

Lifetime warranty* to the original owner against structural defects in material or workmanship on ALL models of Specialized-branded frames and forks

• Includes seatstays and chainstays on full-suspension bikes
• Does not include suspension forks and suspension parts
• Does not include paint and graphics (these are covered below)
Lifetime2 Years
Lifetime warranty* on Roval wheelsLifetime2 Years

Other Specialized-branded products are covered by a two-year warranty

• Paint and graphics on frames and frame set
• Specialized branded components
• Co-branded suspension (BRAIN)
• Motors & Drive systems components on e-bikes
• Equipment
• Helmets
• Shoes
2 Years2 Years

Turbo batteries have a warranty for 2 years or 300 charge cycles— whichever comes first.

2 years2 years

*Register your bike, frameset, or Roval wheels within the first 90 days of purchase for a lifetime warranty to the original owner. For Full warranty policy please visit specialized.com

Sizing Information
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