Bike Comparison
    MSRP
    $3,999
    $3,899
    $2,499$4,000
    Where to Buy
    $1

    At

    $1

    At

    $2,499

    38% off At Specialized

    $3,599

    At TPC

    See more

    Category
    TrailTrailTrail
    Weight
    31.4 lbs32.0 lbs
    5.4
    5.8
    5.3
    AluminumAluminumAluminum
    Fork
    RockShox SIDRockShox Pike SelectFox Rhythm Float 34
    Shock
    RockShox Deluxe UltimateRockShox Deluxe SelectFox Float DPS Performance
    Wheels
    AluminumAluminumAluminum
    29″29″29″
    Brakes
    Hydraulic DiscHydraulic DiscHydraulic Disc
    Groupset
    XT, DeoreGX Eagle, NX EagleNX Eagle
    Drivetrain
    1 × 121 × 121 × 12
    Suspension
    FullFullFull
    Front Travel
    120mm130mm140mm
    Rear Travel
    120mm120mm130mm
    Brand Site

    trekbikes.com

    scott-sports.com

    specialized.com

    Summary
    The Trek Top Fuel 8, Scott Spark 950, and Specialized Stumpjumper Comp Alloy are all 29″ aluminum frame full suspension trail bikes. The Spark 950 has better components and a better fork, while the Stumpjumper Comp Alloy has more travel.
    Similar Bikes
    Accessories
    Ride Feel

    Based on frame geometry and build specs.

    Terrain
    easyextreme
    Handling
    nimblestable
    Top Fuel 8
    Spark 950
    Stumpjumper Comp Alloy
    Other Trail bikes
    Gear Range

    A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

    Lowest gear

    (climbing)

    26 mph

    Top Fuel 8

    25 mph

    Spark 950

    24 mph

    Stumpjumper Comp Alloy

    Highest gear

    (descending)

    Spec Level

    Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.

    Geometry
    Specs
    Frame

    Alpha Platinum Aluminum, internal storage, tapered head tube, Knock Block 2.0, internal guided routing, downtube guard, magnesium rocker link, Mino Link, ABP, Boost148, 120mm travel

    BB StandardBSA, 73mm, Threaded

    Tire Clearance2.5"

    ColorsCrimson; Mulsanne Blue

    Spark Alloy SL 6011; Integrated Suspension Technology; Flex Pivot / Adjustable head angle; Syncros Cable Integration System; BB92 / UDH Interface / 12x148mm with 55mm Chainline

    BB StandardBSA, 73mm, Threaded

    Tire Clearance2.5"

    ColorsCrimson; Mulsanne Blue

    Alloy chassis and rear-end, asymmetrical design, 29 Trail Geometry, horst pivot BB adjustment, threaded BB, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 130mm of travel

    BB StandardBSA, 73mm, Threaded

    Tire Clearance2.5"

    ColorsCrimson; Mulsanne Blue

    Fork

    RockShox SID, DebonAir spring, Rush RL damper, lockout, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 120mm travel

    Travel130mm

    Spring TypeAir

    RockShox Pike Select RL3 Air; Custom Charger 3-Mode Damper; 15x110mm Maxle Lite / 42mm offset / Tapered steerer; Lockout / Reb. Adj. / 130mm travel

    Travel130mm

    Spring TypeAir

    FOX FLOAT 34 Rhythm, GRIP damper, two position Sweep adjustment, 15x110mm axle, 44mm offset, 140mm of travel

    Travel130mm

    Spring TypeAir

    Shock

    RockShox Deluxe Ultimate RCT, 185mm x 50mm

    Travel130mm

    RockShox Deluxe Select RL3 Trunnion; 3 modes / Lockout-Trail-Descend; Debon Air / Reb. Adj.; Travel 120mm / T165X45mm

    Travel130mm

    FOX FLOAT DPS Performance, Rx Trail Tune, rebound and 3-position compression adjust, S1:190x42.5mm, S2-S6: 190x45mm

    Travel130mm

    Bottom Bracket

    Shimano SM-BB52, 73mm, threaded external bearing

    SRAM DUB PF 92 MTB Wide / shell 41x92mm

    SRAM DUB, BSA 73mm, Threaded

    Headset

    Knock Block 2.0 Integrated, 72-degree radius (includes infinite-radius chip), sealed cartridge bearing, 1-1/8'' top, 1.5'' bottom

    Syncros - Acros Angle adjust & Cable Routing HS System; +-0.6° head angle adjustment; ZS56/28.6 – ZS56/40 MTB

    Stem

    Bontrager Elite, 35mm, 0 degree, 45mm length

    Syncros DC 3.0; Syncros Cable Integration System; 0° rise / 6061 Alloy / 31.8mm / 1 1/8"

    Alloy Trail Stem, 35mm bar bore

    Handlebar

    Size: S, Bontrager Line, alloy, 35mm, 27.5mm rise, 750mm width; Size: M, ML, L, XL, XXL, Bontrager Line, alloy, 35mm, 27.5mm rise, 780mm width

    Syncros Fraser 2.0 DC Alloy 6061 D.B.; mini Rise / back sweep 8° / 760mm; Syncros Pro lock-on grips

    Specialized, 6061 alloy, 6-degree upsweep, 8-degree backsweep, 30mm rise, 780mm width

    Saddle

    Bontrager Arvada, steel rails, 138mm width

    Syncros Tofino 2.5 Regular

    Bridge Comp, Hollow Cr-mo rails, 155/143mm

    Seatpost

    Size: S, TranzX JD-YSP39, 100mm travel, internal routing, 34.9mm; Size: M, ML, TranzX JD-YSP39, 150mm travel, internal routing, 34.9mm; Size: L, XL, XXL, TranzX JD-YSP39, 170mm travel, internal routing, 34.9mm

    Syncros Duncan Dropper Post 2.0; 31.6mm / S & M size 125mm / L & XL size 150mm

    X-Fusion Manic, infinite adjustable, two-bolt head, bottom mount cable routing, remote SLR LE lever, 34.9, S1: 100mm, S2: 125mm, S3: 150mm, S4/S5: 170mm, S6: 190mm

    Grips

    Bontrager XR Trail Comp, nylon lock-on

    Specialized Trail Grips

    Groupset
    Rear Derailleur

    Shimano XT M8100, long cage

    SRAM GX Eagle 12 Speed

    SRAM NX Eagle, 12-speed

    Crank

    Size: S, M, ML, L, Shimano Deore M6120, 30T ring, 55mm chainline, 170mm length; Size: XL, XXL, Shimano Deore M6120, 30T ring, 55mm chainline, 175mm length

    SRAM X1 Eagle DUB; 55mm CL / 32T

    SRAM NX Eagle, DUB, S1:165mm, S2-S5: 170mm, S6: 175mm, Steel, 30T

    Shifters

    Shimano XT M8100, 12 speed

    SRAM NX Eagle Trigger

    SRAM NX Eagle, trigger, 12-speed

    Cassette

    Shimano SLX M7100, 10-51T, 12 speed

    SRAM SX-PG1210 / 11-50 T

    SRAM NX Eagle, 12-speed, 11-50t

    Chain

    Shimano SLX M7100, 12 speed

    SRAM CN NX Eagle

    SRAM NX Eagle, 12-speed

    Brakes

    Shimano 4-piston hydraulic disc, M6100 lever, M6120 caliper

    Shimano MT501 Disc

    Front: SRAM G2 R, 4-piston caliper, hydraulic disc, 200mm, Rear: SRAM G2 R, 4-piston caliper, hydraulic disc, 180mm

    Wheels
    Rims

    Front: Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 29'', Rear: Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12mm thru axle, 29''

    Syncros X-30SE / 32H / 30mm

    Specialized 29, hookless alloy, 30mm inner width, tubeless ready

    Spokes

    Stainless Black 15G / 1.8mm

    DT Swiss Industry

    Front Hub

    Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15mm thru axle

    Formula CL-811 / 15x110mm

    Alloy, sealed cartridge bearings, 15x110mm thru-axle, 28h

    Rear Hub

    Bontrager alloy, sealed bearing, 6-bolt, Rapid Drive 108, Shimano MicroSpline freehub, Boost148, 12 mm thru axle

    Formula CL-148S / 12x148mm; Syncros Axle w/Removable Lever; with 6mm Allen, T30 and T25 Tools

    Alloy, sealed cartridge bearings, 12x148mm thru-axle, 28h

    Tires

    Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120tpi, 29x2.40''

    Front: Schwalbe Wicked Will 29x2.4"; Performance / TLR / Foldable / Addix, Rear: Schwalbe Wicked Will / 29x2.4"; Performance / TLR / Foldable / Addix

    Front: Butcher, GRID casing, GRIPTON® T9 compound, 2Bliss Ready, 29x2.3", Rear: Purgatory, GRID casing, GRIPTON® T7 compound, 29x2.3"

    Disc Rotors

    Size: S, M, ML, L, XL, XXL, Shimano RT66, 6-bolt, 160mm; Size: S, M, ML, L, XL, XXL, Shimano RT66, 6-bolt, 180mm

    Shimano SM-RT64 CL / F&R 180mm

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