The Specialized Stumpjumper has been with us for almost as long as mountain biking itself. It has evolved over the years, becoming ever more capable and fun to ride, while still remaining true to its bike-for-every-trail roots. While the original Stumpy was a hardtail, the Stumpjumper FSR featured in this review is a thoroughly modern full suspension bike that is ideal for all types of trail riding from cross-country to enduro and everything-in-between.
With two different frame options (alloy or carbon) three different wheel sizes (650b, 6fattie or 29er) and four models (Comp, Comp Carbon, Expert Carbon, S-Works) the Stumpjumper FSR offers a wide range of choice. However each and every bike in the range offers capable performance on technical trails in a package lightweight enough for all-day-adventures. Of course, each model has its own particular benefits which we highlight below to help you find the right Stumpjumper for you.
Lightweight with dialled trail geometry the Stumpjumper FSR features a slack 67 degree head angle and low bottom bracket height for a planted ride and stability at speed. The characteristically short chainstays keep things nimble in the tight.
Each of the three wheel sizes - 650b (27.5"), 6Fattie (27.5"+) and 29" - are available in three frame options. The top of the line S-Works Stumpjumper features a full carbon composite frame built from the very highest quality FACT 11m carbon fibres. The Expert and Comp Carbon models feature a FACT 9m carbon mainframe with and M5 aluminium alloy rear end while the Comp gets a full M5 alloy frame. Each option is stiff and strong but the carbon models are lighter.
For 2017 all the Stumpjumper FSR models feature Boost hub spacing for improved wheel stiffness and extra tyre clearance. Internal cable routing keeps the lines nice and clean and the carbon models get a SWAT storage compartment in the downtube.
The carbon framed Stumpjumpers feature a SWAT storage compartment in the downtube allowing you to store your trail essentials on the bike rather than on your back.
The FSR rear suspension system offers fully active performance that keeps on absorbing the bumps on the trail even while you are pedalling and braking
The Stumpjumper offers a little more suspension travel than most full sus trail bikes. This makes it more capable on challenging terrain, but it still retains a lightweight playful, trail bike feel. The 650b Stumpjumpers get 150mm of travel front and rear while the 29ers and 6Fatties get a 150mm fork up front with 135mm of rear wheel travel.
Apart from the S-Works, which features an Öhlins STX shock, with the much-sought-after Öhlins RXF36 fork, the Stumpjumper features RockShox shocks on all models. The RockShox Monarch takes care of the rear and offers adjustable compression damping (2 clicks on the Comp, 3 clicks on the Expert) so you can adapt the bikes performance to the trail ahead. Upfront, you get the very capable RockShox Pike RC fork on the Expert with a Yari on the Comp Carbon and a Revelation on the alloy Comp.
For 2017 the Stumpjumper features a wide range 'one by' drivetrain on all models. This is great to see as you now get the advantages of simpler gear shifting and improved chain security on all models. The S-Works gets SRAM XX1 Eagle 1x12 speed, with a massive 500% range, while the other models feature SRAM 1x11 speed drivetrains (GX on the Comp, X1 on the Expert) with gear ranges that are almost as wide as Eagle allowing you to take on every trail on the mountain.
SRAM Guide hydraulic disc brakes on all models offer confident all-weather stopping power. The Specialized Command Post is also found on all models and allows you to make the most of every trail section.
The Stumpjumper takes full advantage of the easy shifting and trouble free running offered by SRAM 1x drivetrains.
The 6Fattie and 29er Stumpjumpers share the same frame so you can fit 29" wheels to a 6Fattie and visa versa. This means you can run both wheel sizes on one bike - great if you're not sure which one you prefer.
You get a choice of three different wheel sizes on the Stumpjumper. Each has their own benefits so the choice will depend on your own personal preference. 650B (27.5") wheels are the most popular size and are the lightest and most nimble of the three, making them ideal for tight technical trails. 29" wheels roll faster over rough terrain and offer more grip, but are slower to accelerate than smaller wheels. 6Fattie wheels have a similar diameter to 29" wheels but have over 50% more tyre volume which means that you get more grip and a smoother ride on rough terrain while still rolling quickly.
The Roval Traverse wheels on all models are tough yet lightweight so are perfect for a trail bike. The wheel build becomes lighter as you move up through the range and you get carbon rims on the S-Works Stumpjumpers.
As a light-weight rider brought up on hardtails I was keen to see how a £4k bike with 150mm of travel and a rear shock would perform on the technical climbs of Cwmcarn. The answer is better! The Stumpjumper FSR Carbon is lightweight, and comes shod with the super-grippy Slaughter rear tyre - 2.3 inches of rubber that didn't slip once over the course of 2 hours riding. Coupling this with the Specialized Butcher tyre on the front, meant climbing and descending were simply a case of pointing in the right direction and putting the power down.
The Specialized Stumpjumper FSR Expert Carbon is the ideal trail centre bike where there are both technical downs and ups. With superb traction, it does everything well, whilst remaining lightweight and agile. The FSR is a stunning looking bike that will turn heads in the car park, but more importantly, it's backed up with really solid kit that will give you a balanced, confident ride out on the trail.
Henry Wright - Tredz shop and hardtail enthusiast
Coming from a downhill and enduro background I was a little sceptical taking a trail bike to Bike Park Wales; but it was the most fun bike I've ridden there! It pedalled much better than its big travel counterparts but still took all the rougher trails in its stride. Owain Lund - Tredz shop and gravity mountain biker
Perfect for UK trail centres the Stumpjumper is also capable enough for taking on challenging enduro and bike park trails as well as being lightweight enough for cross-country adventures. The consistency of components across the range mean that you get similar performance on all models. Of course, the bikes get lighter, the gear shifts slicker and the suspension plusher as you move up through the range, but every Stumpjumper will reward you with a fun and efficient ride.
The SWAT storage in the downtube is a real plus point for the Stumpjumper as it enables you to ride without a back pack on shorter rides.