Stumpjumper ST Expert 27.5
Stumpjumper ST Expert 27.5
Stumpjumper ST Expert 27.5
Specialized

Stumpjumper ST Expert 27.5

Regular price $4,999.99 Save $0.00

93218-3503


1 in stock

This is a special order item, available to ship within 5-10 business days.

This item is available for FREE Home Delivery in the Greater Bay Area and Sacramento Region or it can be picked up at any Mike's Bikes.

Trail bikes can't usually 'shred the gnarly stuff' and 'climb with your XC buddies,' but we're confident in saying that the Stumpjumper Expert ST 27.5 is totally capable of both. It combines precise handling, perfect suspension kinematics, and a complete abandon of proprietary nonsense with a slightly steeper geometry, less travel (130mm front/130mm rear), and 27.5-inch wheels to make it a snappy, responsive, and true 'do-it-all' trail bike.

Our design goal for the new Stumpjumper was simple—build the ultimate trail bike, one that feels telepathic.

We started by creating our own mountain-specific stiffness test, and then we looked at the layout with Finite Element Analysis (FEA) to see where we could get the biggest stiffness improvements. This led to a big discovery: The Large and X-Large frames needed more front-end stiffness while the Smalls and Mediums were just fine. We were able to create a frame design that was 20% more efficient. And in the end, this proved to be one of the lightest trail frames on the market, today.

When designing the frame with the stiffness targets being a main goal, we developed a radical new sidearm design. The front-end and rear-end are connected at three points, and the sidearm helps keep all these points super stiff and connected, all while taking about 100 grams out of the rear-end. More explicitly, this minimizes frame flex when the rear suspension is active.

We continued down the suspension path with a custom Rx Trail Tune on both the fork and rear shock. Suspension performance is highly dependent on frame, wheel, and rider size, so we use our Rx Tune to get each bike to land in the middle of the adjustment spectrum, and this gives you the biggest possible range to fine-tune your ride. Another focal point of the tune was matching the suspension characteristics between wheel sizes—we developed a specific Rx Tune for each platform. So, no matter what wheel size you prefer, you'll get perfectly linear suspension.

Steps were also taken to make this bike easy to live with. Threaded bottom brackets make a triumphant return, and we made room for up to a 3.0' tire. You're also free to run whatever aftermarket rear shock you want, since we're using standard metric shocks. We revamped the SWAT™ box, too, making it sleeker, lighter, and with more volume. And customization is furthered with a Flip Chip that lets you to dial-in your Stumpy to your riding style. Switch it from High to Low and it drops your bottom bracket 6mm and slackens the head tube by half-a-degree. Little details also jump out to surprise you, like a newly designed ribbed chainstay protector that makes chain slap a thing of the past and nearly silences the drivetrain. Lastly, we seriously couldn't make cable routing any easier on carbon models. Full tubes can be found throughout the carbon frame, so all you have to do is push the cable and it'll come out the other end. No more lazy loop, hidden stashes of magnets, pokey spokes, or pillows to cry in.

     

    SPECS

    FRAME
    FACT 11m, full carbon chassis and rear end, asymmetrical design, 27.5 Trail Geometry, SWAT™ Door integration, threaded BB, fully enclosed internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 130mm of travel
    FORK
    RockShox Pike RC, DebonAir, rebound / low-speed compression adjust, tapered steerer, 46mm offset, 15mm Maxle® Stealth thru-axle, 15x110mm Boost™, 130mm of travel
    REAR SHOCK
    RockShox Deluxe RT3, Rx Trail Tune, rebound & 3-position compression adjust, 190x45.0mm
    FRONT HUB Specialized, sealed cartridge bearings, 15x110mm spacing, 28h
    REAR HUB Specialized, sealed cartridge bearings, 12x148mm thru-axle, 28h
    SPOKES DT Swiss Industry
    RIMS
    Roval Traverse Carbon 27.5, hookless carbon, 30mm inner width, tubeless ready, hand-built
    INNER TUBES Presta, 40mm valve
    FRONT TIRE Butcher, GRID Casing, GRIPTON® compound, 2Bliss Ready, 27.5 x 2.3"
    REAR TIRE Purgatory, GRID casing, GRIPTON® compound, 2Bliss Ready, 27.5 x 2.3"
    CRANKSET Truvativ Descendant, aluminum, Boost™ 148, 170mm crankarm, 24mm spindle
    CHAINRINGS 32T
    BOTTOM BRACKET SRAM GXP
    SHIFT LEVERS SRAM GX Eagle, trigger, 12-speed
    REAR DERAILLEUR SRAM GX Eagle, 12-speed
    CASSETTE SRAM GX Eagle, 12-speed, 10-50t
    CHAIN SRAM GX Eagle, 12-speed
    FRONT BRAKE SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 200mm
    REAR BRAKE SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 180mm
    HANDLEBARS
    Specialized Trail, 7050 alloy, 8-degree backsweep, 6-degree upsweep, 27mm rise, 780mm, 31.8mm clamp
    GRIPS Specialized Sip grip, half-waffle, S/M: regular thickness, L/XL: XL thickness
    STEM Specialized Trail, forged alloy, 4-bolt, 5mm rise, 40mm
    SADDLE Body Geometry Phenom Comp, hollow Cr-Mo rails, 143mm
    SEATPOST
    Command Post IRcc, 16-position micro-height adjustable, two-bolt head, bottom mount cable routing, remote SRL lever, 34.9mm, S: 130mm, M/L/XL: 160mm of travel
    SEAT BINDER Specialized bolt-type, alloy, 38.6mm