To improve your shopping experience today and in the future, this site uses cookies.
I Accept Cookies
SJ 15 Comp ALLOY PDRNDGO/SMK S1
SJ 15 Comp ALLOY PDRNDGO/SMK S1
Specialized

Specialized Stumpjumper 15 Comp Alloy Lightweight Mountain Bike 2025

£2,989.00
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.

Specialized Stumpjumper 15 Comp Alloy Lightweight Mountain Bike 2025

Season:2025

Brand:Specialized

Code:42213975366730

Stumpjumper 15 EVO 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.

BREAKTHROUGH CAPABILITY:GENIE Shock Technology combines a poppy, playful ride with a bottomless DH feel.

ULTIMATE CONTROL:Measurably better traction than “Bike of the Year” Stumpjumper EVO.

UNMATCHED PERSONALIZATION:Six-way geometry adjustment, mixed wheel or 29”, tunable spring curve, and more.

GENIE—The Magic Carpet Ride:The biggest innovation on the Stumpjumper 15 Alloy is GENIE. This patent-pending air spring technology Specialized's invented grants every trail rider three wishes: the maximum grip and traction of a coil spring feel, better bottom-out prevention than a standard air spring, and the ability to tune mid-stroke and end-stroke support independently.

ILLUMINATING GENIE:GENIE combines the control-enhancing linear spring rate of a coil spring through the “bump zone” with the progressive spring rate of an air spring at the end of the stroke to avoid bottom-outs. Truly, it's the best of both worlds – coil and air – with extra tunability. Say goodbye to compromises and hello to the future of riding.

WHAT BUMP?:With 16.3% better bump force management than a traditional air-sprung shock, GENIE makes the Stumpjumper 15 Alloy ride like a bike with more travel. For example, the Stumpjumper 15 Alloy (with 145 mm rear wheel travel) and Specialized's Enduro (170 mm travel) both use 101 mm of travel to absorb a 1080 N bump force.

TRACTION GALORE:Extensive field testing proves that Stumpjumper 15 Alloy with GENIE delivers 57% better traction than a standard air-sprung shock because GENIE technology gives you supple, coil-like performance, which keeps the wheel in contact with the ground a greater percent of the time than a typical air spring would.

BYE, BYE, BOTTOM-OUTS:39% fewer bottom-outs than a standard air spring. During big hit events, you benefit from the rising rate in the last 30% of the GENIE stroke. Because of this two-stage, pronounced rising rate, GENIE reduces the frequency and severity of bottom-outs.

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, any terrain. The head angle and bottom bracket height can be fine-tuned for stability or clearance.

WHEEL CHOICE:With Specialized's aftermarket 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 Alloy elevates downtube storage, an innovation Specialzied pioneered.

MORE RELENTLESS THAN YOU:Specialized's full-suspension bikes are built to be relentless, designed to endure years of hard riding, and backed by the best support and policies to keep you on the trail. Their unbeatable lifetime, no-questions-asked replacement suspension pivot bearings to the original owner is just one way they've got you covered.

  • All-new M5 alloy frame with SWAT door integration
  • Robust Specialized alloy wheels with sealed cartridge bearings
  • Ride Dynamics tuned FOX FLOAT Performance with Specialized GENIE patent-pending air spring technology provides maximum grip and traction found in a linear coil spring, bottom-out prevention found in a progressive air spring, and the ability to tune mid-stroke and end-stroke support independently. 2-position open and firm damper adjustments.
  • Eat up the chunkiest trails with the FOX FLOAT 36 Rhythm fork with GRIP damper
  • Performance-focused and durable Shimano SLX drivetrain
  • Big stopping power from TRP Trail EVO 4-piston brakes
  • Trustworthy time and time again X-Fusion Manic dropper post
  • 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
Fork
FOX FLOAT 36 Rhythm, GRIP damper, two position Sweep adjustment, 15x110mm QR axle, 44mm offset, S1:140mm of travel, S2-S6:150mm of travel
Rear Shock
FOX FLOAT Performance with Specialized GENIE Shock Tech, Ride Dynamics Trail Tune, 2-position lever w/ LSR adjustment, S1:210x52.5mm, S2-S6:210x55mm
Brakes
Front Brake
TRP Trail EVO, 4-piston caliper, hydraulic disc, 203mm
Rear Brake
TRP Trail EVO, 4-piston caliper, hydraulic disc, S1-S2: 180mm, S3-S6: 203mm
Drivetrain
Chain
Shimano SLX, M7100, 12-speed
Bottom Bracket
Shimano, BB-MT801, Threaded
Crankset
Shimano SLX, M7120, 32T ring, 55mm chainline, S1-S3:165mm, S4-S6: 170mm
Rear Derailleur
Shimano SLX, M7100, SGS, 12-speed
Cassette
Shimano SLX, CS-M7100, 12-speed, 10-51t
Shift Levers
Shimano SLX, M7100, 12spd
Wheels & tires
Front Hub
Alloy, sealed cartridge bearings, 15x110mm thru-axle, 28h
Front Tire
Butcher, GRID TRAIL casing, GRIPTON® T9 compound, 2Bliss Ready, 29x2.3"
Spokes
DT Swiss Industry
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, hookless alloy, 30mm inner width, tubeless ready, Front: 29, Rear: S1-S2: 27.5, S3- S6: 29
Inner Tubes
Standard, Presta valve
Cockpit
Stem
Alloy Trail Stem, 35mm bar bore
Saddle
Bridge Comp, Hollow Cr-mo 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
SeatPost
X-Fusion Manic, infinite adjustable, two-bolt head, bottom mount cable routing, remote SLR LE lever, 34.9, S1: 125mm, S2: 150mm, S3: 170mm, S4-S6: 190mm
Grips
Specialized Trail Grips
Product details
Product ID
221397
Weight
Weight
16.17 kg (35 lb, 10.4 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 Specialized Stumpjumper 15 Comp Alloy Lightweight Mountain Bike 2025

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