2025 Specialized Stumpjumper 15 Comp Alloy Full Suspension Mountain Bike

£3,750.00

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The 2025 Specialized Stumpjumper 15 Comp Alloy Full Suspension Mountain Bike is the second bike in Specialized's flagship mountain bike range. It comes with the latest suspension tech and adjustable geometry.

The biggest innovation on the Stumpjumper 15 is GENIE. This patent-pending air spring technology, invented by Specialized, grants every trail rider’s three wishes: the feel and control of a coil spring, better bottom-out prevention than a standard air spring, and a tuneable “platform” for a playful feel. Extensive field testing proves that Stumpjumper 15 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. As the quintessential trail bike, Stumpjumper 15 Alloy balances efficiency and optimal bump force management.

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. 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. The bike can be run either with 29 inch wheels front and rear or as a 27.5/29 mullet.

The Stumpjumper 15 Comp Alloy comes with a FOX FLOAT 36 Rhythm 150mm travel fork, super reliable 12 speed Shimano SLX gearing, TRP Trail EVO hydraulic brakes and an X-Fusion Manic dropper post. The S1 and S2 sizes comes with mullet 27.5/29 wheels while the other sizes come with 29 wheels front and rear.

This bike is perfect for

Mountain bikers looking for a trail bike that is efficient to pedal but is still playful and capable of handling big bumps. With 6 different geometry settings and the ability to run either a mullet or 29/29 setup it can be tuned to suit your riding style.

Key Features

  • 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

Specialized MTB Range Guide

Specialized have been making mountain bikes for nearly as long as there have been mountain bikes. Models like the Rockhopper and Stumpjumper have been staples of the range for decades with the technology being updated and refined every year. The 2022 Specialized mountain bike range has bikes for all kinds of mountain bikers with prices ranging from £500 to over £10,000.

All Specialized mountain bikes are ‘beyond gender’. Although they are technically unisex, Specialized tend to fit more female friendly saddles on the smaller size bikes and more male friendly saddles on the larger bikes. These can easily be swapped out to suit preferences.


Read the full guide to the Specialized MTB Range


Who are Specialized?

Specialized is one of the best-known quality bike brands in the world. Started by a group of riders in 1974. A fact which has guided their decision making ever since.

" Made for riders, by riders."

They strove to make the best quality tires when quality tyres weren't around. When people wanted to ride cruisers in the dirt, they made the first production mountain bike. When roadies wanted to go faster, Specialized doubled down on carbon and built their own wind tunnel.

Bikes like the Allez, Rockhopper and Stumpjumper have developed followings and reputations of their own. Specialized has a reputation for making high-end, high-quality bikes. Specialized bikes always look great with high-quality paint and sensible sizing hel0s you get the right bike each time. If you buy a Specialized bike you can be guaranteed it will do what it is supposed to and will last.


Find our more about Specialized bikes

Mountain Bike Buying Guide

Mountain biking is an incredibly diverse sport. Mountain bikes now come in three main flavours. They are XC, Trail and Enduro.

XC – short for cross country, are quick race bikes. They will normally have 29” wheels and come with 100mm of suspension. If you are mainly going to be riding bridleways and natural trails in the South East of England, where our shops are, an XC bike will be the quickest and most efficient option.

Trail – these bikes are designed to be pedalled up and down hill and for use on bridleways and natural trails, but also at dedicated trail centres. They normally come with 130mm or 140mm of suspension travel and can have either 27.5” or 29” wheels, but 29” is quickly becoming the norm. Trail bikes are good all-rounders. They won’t be as fast as an XC bike on the flat but they can handle a lot more challenging terrain, and a few jumps. If you plan on taking your bike to trail centres in Wales, or to the Alps, then a trail bike may be your best option.

Enduro – enduro racing is a thing in and of itself but many people buy enduro bikes for ‘aggressive’ trail riding and uplift days at places like Bike Park Wales. This generally means challenging downhill trails with some big jumps. With around 160mm of suspension travel enduro bikes can take some big hits. They are designed to be efficient enough to pedal up hills but really come into their own when pointed downhill. You get enduro bikes in either 27.5” or 29” wheel sizes as well as mullet setups of 29 at the front and 27.5 at the back.


Men’s and women’s mountain bikes

Nearly all the mountain bikes we sell are now unisex. All of the big brands have gradually stopped doing dedicated men’s and women’s bikes over the last few years. Instead they are focussed on producing bikes in a bigger range of sizes. So, for instance, the Trek Marlin 5 is a unisex bike that now comes in sizes from XXS to XXL large. This means it will fit riders from 4’ 5” to 6’ 5” and everything in between.


Read our full mountain bike buyers guide


Price Match at Cycles uk

We understand that price is important, so we regularly price-check our competitors to make sure we have the best offers available. We recognise that we will not always be the cheapest, so if you see the same product cheaper from any of our competitors then please get in touch via the form below and we will do our best to match any reasonable advertised price.

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
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
Crankset Shimano SLX, M7120, 32T ring, 55mm chainline, S1-S3:165mm, S4-S6: 170mm
Chain Shimano SLX, M7100, 12-speed
Cassette Shimano SLX, CS-M7100, 12-speed, 10-51t
Shift Levers Shimano SLX, M7100, 12spd
Rear Derailleur Shimano SLX, M7100, SGS, 12-speed
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
Rims Specialized, hookless alloy, 30mm inner width, tubeless ready, Front: 29, Rear: S1-S2: 27.5, S3- S6: 29
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
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
Saddle Bridge Comp, Hollow Cr-mo rails, S1-S2: 155mm, S3-S6: 143mm
Seat Post 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
Seat Binder Alloy, 38.6mm
Inner Tubes Standard, Presta valve
Bottom Bracket Shimano, BB-MT801, Threaded
Front Hub Alloy, sealed cartridge bearings, 15x110mm thru-axle, 28h
Rear Hub Alloy, sealed cartridge bearings, 12x148mm thru-axle, 28h
Spokes DT Swiss Industry
Stem Alloy Trail Stem, 35mm bar bore
Swat SWAT internal downtube storage
Colours Gloss Smoke / Cool Grey, Satin Powder Indigo / Smoke
Sizes S1, S2, S3, S4, S5, S6
Brand Specialized
Model Year 2025
Barcodes 196625029042, 196625029592, 196625030109, 196625030505, 196625030550, 196625030918, 196625031380, 196625031489, 196625142758, 196625143045, 196625143137, 196625143205
SKUs / Part Numbers 93325-5401, 93325-5402, 93325-5403, 93325-5404, 93325-5405, 93325-5406, 93325-5501, 93325-5502, 93325-5503, 93325-5504, 93325-5505, 93325-5506

Please note: Manufacturers can sometimes change the specification of the products from time to time.

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