To improve your shopping experience today and in the future, this site uses cookies.
I Accept Cookies
Specialized

2025 Specialized Stumpjumper 15 Alloy Dual Supension Lightweight Mountain Bike

£2,740.00
Earn
in Customer Rewards when you buy this item today
Pre-Order

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
Earn Rewards
When you purchase this item, you will earn of rewards points to spend on your next purchase from us. You can spend your Rewards balance in-store & online.

Hassle free returns

Your statutory rights are not affected by our Returns Policy. To the extent that any provision in our Returns Policy conflicts with your statutory rights, your statutory rights will prevail and the particular offending provision in our Returns Policy will be deemed inapplicable.


Returns and refunds

If you are unhappy with your item, please let us know. Our Returns Policy gives you 30 days to return or exchange an item bought with a valid receipt. If 30 days have gone by since your purchase, we cannot offer you a refund or exchange.To be eligible for a refund or exchange, goods must be returned in a re-saleable condition. That means your item must be unused and in the same condition that you received it. The item must be in the original packaging and returned with any accessories, labels and “free gifts” or bonus items.

To complete your refund or exchange, we require a receipt or proof of purchase.

Under the Consumer Rights Act of 2015 you have an early right to reject goods that are unsatisfactory quality, unfit for purpose or not as described, and get a full refund.

But this right is limited to 30 days from the date you took ownership of the goods (this could be the date of purchase or the date the goods were delivered to you - whichever is later).

After the initial 30 days, you can't demand a full refund in the first instance, but you still have the right to a repair or replacement.

How to return your item(s):

  1. Put your unused, labelled item for return back in its original packaging.
  2. Fill in a Returns Form and include this with the item you are returning in a parcel.
  3. Send the parcel to the following address:

J's Cycles

Unit A Kirkgate Commercial Centre

Chantry Bridge

Wakefield

WF1 5DL


We will be in touch if there are any issues or when your return has been processed.

Refunds (if applicable)

Once your returned item is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund. If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 calendar days. If you paid for standard delivery of the goods, the cost of standard delivery will also be refunded.

There are certain situations where only partial refunds are granted (if applicable):

- Any item not in its original condition, which is damaged or missing parts for reasons not due to our error

- Any item that is returned more than 30 days after delivery.


Late or missing refunds (if applicable)

If you haven’t received a refund yet, first check your bank account again.

Then contact your credit card company, it may take some time before your refund is officially posted.

Next contact your bank. There is often some processing time before a refund is posted.

If you’ve done all of this and you still have not received your refund yet, please contact us at orders@jscycleshack.com

Returns Shipping

If the item is being returned as a result of our error (damaged, defective, wrong item sent etc), we will refund Royal Mail First Class or Standard Parcel postage costs.

If the item is being returned as a result of a change of mind, purchased the wrong size, item is not suitable, etc… the original cost of the outbound postage will be refunded by us, however the consumer is liable for all return costs incurred.

If you are shipping an item over £50, you should consider using a trackable shipping service or purchasing shipping insurance as we cannot guarantee that we will receive your returned item.


International Refunds

All refunds are processed in GBP (£). J’s Cycle Shack will not refund any charges made by your bank for currency conversions or any customs charges incurred throughout the shipping/returns process. J’s Cycle Shack will not refund differences caused by fluctuations in exchange rates. Shipping costs will be refunded as outlined in the paragraph above.


Guidelines For The Best Experience

Each returned item should be in it’s original packaging with the manufacturer’s labels attached. Please do not tape or attach labels directly to the retail packaging.

Retail store purchases should be returned to the original place of purchase. If this is not possible then follow our website returns policy and include proof of purchase.

We reserve the right to reject the return of goods which are not returned in accordance with our Returns Policy and we may request that you pay for the shipping of such goods back to you. Our returns policy does not affect your statutory rights.

A deduction will be made if the value of the goods has been reduced as a result of you handling the goods more than was necessary. The extent to which a customer can handle the goods is the same as it would be if you were assessing them in a shop.

Once we receive your goods, we will inspect and process them within 24hrs. Refunds will automatically be issued to the same payment method used to purchase the goods. As soon as your return has been processed by our team we will email you to let you know. In the unlikely event that you don’t receive this email within 10 days of posting your parcel to us, please get in touch with our Customer Service Team through our Contact us page or by calling 01977 67999.

If your purchase isn’t everything you expected it to be and you wish to exchange an item the simplest and quickest thing to do is place a brand new order for your new item and return the old one to us for a full refund.

Goods that cannot be returned:

There are some goods you can’t return if you simply change your mind, including:

  • CDs, DVDs or software if you’ve broken the seal on the wrapping
  • Perishable and other items that deteriorate rapidly such as food
  • Custom Built, tailor-made or personalised goods
  • Underwear and earrings
  • Used goods including footwear which have had cleats fitted

European Online Dispute Resolution (ODR)

For information regarding European ODR, please click here.


Right to cancel

In addition to our Returns Policy, under the Consumer Contracts Regulationsof 2013, you have the right to cancel your order up to 14 days from the day you receive your goodsif you are an online, mail or telephone order customer. You then have a further 14 days from the date you notify the retailer of your cancellation to return thegoods.Therefund will include any standard delivery charges paid. You will be responsible for the cost of returning a cancelled order to us.

We will refund to you the price paid for the items and (unless you did not pay for delivery) the delivery charges that you paid up to a maximum amount of the cost of our standard delivery option. You will be refunded to your original method of payment within 14 calendar days of our receipt of the cancelled items or, if earlier, within 14 days from the day we receive proof of return from you. If we do not receive the cancelled items back, we may arrange to collect them from you at your cost.

To exercise your right to cancel, please email us at orders@jscycleshack.com with your order number, first and last name.

2025 Specialized Stumpjumper 15 Alloy Dual Supension Lightweight Mountain Bike

Season:2025

Brand:Specialized

Code:42762395437114

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.

KINEMATICS PERFECTED: 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 pedaling characteristics.

HONED GEOMETRY: 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 centers 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.

RIDE YOUR WAY: 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.

FORM FOLLOWS FUN: 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. We engineered the M5 Alloy chassis—front end, rear end, and the link between them—as a single unit that hits the stiffness target we established for trail riding.

WHEEL SIZE: All coil-sprung models come with mixed wheels.

WHEEL CHOICE: With our aftermarket link shock links, you can choose between big wheels front and rear or mix things up with a 27.5” rear for a more responsive and playful ride. No matter what you choose, geometry is unaffected.

CARRY IT ALL: SWAT on Stumpjumper 15 elevates downtube storage, an innovation we pioneered.

MORE RELENTLESS THAN YOU: Our full-suspension bikes are 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. Our unbeatable lifetime, no-questions-asked replacement suspension pivot bearings to the original owner is just one way we've got you covered.

  • All-new M5 alloy frame with SWAT door integration
  • Ride Dynamics tuned X-Fusion 02 Pro RL shock with adjustable rebound and lockout
  • RockShox Psylo Silver fork with Motion Control Damper
  • Reliable Shimano MT-420 4-piston brakes
  • 12-speed Shimano Deore drivetrain
  • Lifetime replacement of suspension pivot bearings to the original owner



Bikes are professionally built by trained technicians to ensure optimal performance, safety, and comfort for each customer. Every component is carefully assembled and adjusted to meet the rider’s specific needs and preferences.

Our convenient man-in-van delivery service brings your professionally built bike straight to your doorstep. A dedicated technician ensures it arrives fully assembled, ready to ride, and adjusted to your specifications.
Technical Information
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
Sizing Information
S1S2S3S4S5S6
Crank Length165165165170170170
Handlebar Width780780800800800800
Stem Length404040404040
Saddle Width155155143143143143
Seatpost Length125150170190190190
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
Professional Opinion
Product Reviews
Write a review
0 As rated by 0 customers

Write a review for 2025 Specialized Stumpjumper 15 Alloy Dual Supension Lightweight Mountain Bike

Your name
Your email address
How would you rate it?
Would you recommend this product?
Let others know your opinion
Submit Review Close
Home Mountain Bikes Specialized Mountain Bikes