Specialized Stumpjumper 15: suspension setup & specs

Manufacturer data retrieved on 26 September 2026 · 7 builds · RRP €4,499 – €14,499 · Bike type: Full-suspension MTB

The Specialized Stumpjumper 15 is a trail bike with 150–160 mm of fork travel and 145 mm at the rear. Below you will find all 7 current builds with fork, shock and shock size, plus SAG values in millimetres and a tyre pressure table.

Calculate the setup for your Specialized Stumpjumper 15 →

All builds

Fork, shock, shock size (eye-to-eye length × stroke) and rear travel, weight and price according to the manufacturer. Wheel size: 29 (S1–S2: 27.5 rear) / 29 (S2: 27.5 rear).

Build	Fork	Shock	Shock size	Rear travel	Weight	RRP	Calculator
EVO Comp Alloy	FOX 36 Float Rhythm GRIP (160 mm)	FOX Float X Performance GENIE	210x55	145 mm	–	€4,499	Setup →
EVO Comp	FOX 36 Float Rhythm GRIP (160 mm)	FOX Float X Performance GENIE	210x55	145 mm	–	€6,499	Setup →
EVO Expert	FOX 36 Float Performance Elite GRIP X2 (160 mm)	FOX Float X Performance Elite GENIE	210x55	145 mm	–	€6,999	Setup →
EVO Expert XT Di2	FOX 36 Float Performance Elite GRIP X2 (160 mm)	FOX Float X Performance Elite GENIE	210x55	145 mm	–	€6,999	Setup →
EVO Pro	FOX 36 Float Factory GRIP X2 (160 mm)	FOX Float X Factory GENIE	210x55	145 mm	–	€8,999	Setup →
S-Works EVO XTR Di2	FOX 36 Float Factory GRIP X2 (160 mm)	FOX Float X Factory GENIE	210x55	145 mm	–	€12,499	Setup →
S-Works LTD	FOX 36 Float Factory GRIP X2 (150 mm)	FOX DHX Live Valve NEO Factory (coil)	210x55	145 mm	–	€14,499	Setup →

How it compares

Up front the Specialized Stumpjumper 15 runs 150–160 mm – 20 mm more than the 140 mm median we calculated from 44 bikes in the “trail bike” category. Within Specialized’s mountain bikes, it sits between the Specialized Epic 9 and the Specialized Enduro on travel. The frame is available in aluminium or carbon.

With a starting price of €4,499 (EVO Comp Alloy), the Specialized Stumpjumper 15 is above the category median (€3,000). For the S-Works LTD build, Specialized asks €14,499. Specialized uses FOX suspension throughout. In total, 3 different forks are used, from the FOX 36 Float Rhythm GRIP to the FOX 36 Float Factory GRIP X2. The S-Works LTD build uses a coil shock (FOX DHX Live Valve NEO Factory (coil)), so SAG is set with the spring rate rather than air pressure.

Setup notes for this spec

Air fork (FOX 36 Float Rhythm GRIP): the air valve is on top of the left leg under a cap. Change pressure in small steps (about 5 psi (0.34 bar)) and cycle the fork a few times afterwards so the air chambers can equalise.
Rebound: on FOX suspension the rebound adjuster is red. Always count clicks from fully closed (clockwise to the stop) so you can return to any setting.
Coil spring (FOX DHX Live Valve NEO Factory (coil)): if SAG is off, only a different spring rate will fix it. Preload should just keep the spring from rattling; more preload makes the shock less supple.
Shock (FOX Float X Performance GENIE): get on the bike in your normal riding position, step off carefully and read the O-ring. Always cycle the shock a few times after pumping.

Target SAG for the Specialized Stumpjumper 15

The table converts the recommended SAG percentages into millimetres, so you can check them with the O-ring directly on the stanchion and on the shock shaft. Adjust the air pressure until the value is right. If Specialized specifies its own target SAG for your model, that takes priority.

160 mm fork, 55.0 mm shock stroke (EVO Comp Alloy, EVO Comp, EVO Expert, EVO Expert XT Di2, EVO Pro, S-Works EVO XTR Di2)

Riding style	Fork SAG	Shock SAG
XC / touring	17 % = 27 mm	24 % = 13.2 mm on the shock shaft
Trail	20 % = 32 mm	28 % = 15.4 mm on the shock shaft
Enduro / rough	22 % = 35 mm	30 % = 16.5 mm on the shock shaft
Bike park	20 % = 32 mm	27 % = 14.9 mm on the shock shaft

150 mm fork, 55.0 mm shock stroke (S-Works LTD)

Riding style	Fork SAG	Shock SAG
XC / touring	17 % = 26 mm	24 % = 13.2 mm on the shock shaft
Trail	20 % = 30 mm	28 % = 15.4 mm on the shock shaft
Enduro / rough	22 % = 33 mm	30 % = 16.5 mm on the shock shaft
Bike park	20 % = 30 mm	27 % = 14.9 mm on the shock shaft

How to measure SAG is explained in our guide SAG setup.

Tyre pressure starting values

Basis: 2.40″ tyre width, tubeless, trail casing. If you run tubes, add about 0.2 bar (2.9 psi); with an insert, about 0.1 bar (1.5 psi) less is enough. Stock tyres: Butcher / Eliminator 2.3; Butcher / Eliminator 2.4.

Ready-to-ride weight	Front	Rear
60 kg	1.43 bar (21 psi)	1.63 bar (24 psi)
70 kg	1.55 bar (22 psi)	1.75 bar (25 psi)
80 kg	1.67 bar (24 psi)	1.87 bar (27 psi)
90 kg	1.79 bar (26 psi)	1.99 bar (29 psi)
100 kg	1.91 bar (28 psi)	2.11 bar (31 psi)
110 kg	2.03 bar (29 psi)	2.23 bar (32 psi)
120 kg	2.15 bar (31 psi)	2.35 bar (34 psi)

Air pressure in the fork and shock

You will find a guide value for air pressure on the fork sticker (or on the shock) or in the suspension makers’ charts. Our calculator also takes riding style and rebound into account. In the end, measured SAG is what counts.

Note: all information without guarantee. Specs can differ by model year, frame size and market – the type plate, the owner’s manual and Specialized’s information are authoritative. Never exceed the maximum pressures of fork, shock, tyres and rims.