MSRP | $3,999 | $3,899 | $2,499 |
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Where to Buy | — $1 At | — $1 At | |
Category | Trail | Trail | Trail |
Weight | 31.4 lbs | 32.0 lbs | |
Aluminum | Aluminum | Aluminum | |
Fork | RockShox SID | RockShox Pike Select | Fox Rhythm Float 34 |
Shock | RockShox Deluxe Ultimate | RockShox Deluxe Select | Fox Float DPS Performance |
Wheels | Aluminum | Aluminum | Aluminum |
29″ | 29″ | 29″ | |
Brakes | Hydraulic Disc | Hydraulic Disc | Hydraulic Disc |
Groupset | XT, Deore | GX Eagle, NX Eagle | NX Eagle |
Drivetrain | 1 × 12 | 1 × 12 | 1 × 12 |
Suspension | Full | Full | Full |
Front Travel | 120mm | 130mm | 140mm |
Rear Travel | 120mm | 120mm | 130mm |
Brand Site | |||
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. |
Based on frame geometry and build 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 Standard: BSA, 73mm, Threaded Tire Clearance: 2.5" Colors: Crimson; 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 Standard: BSA, 73mm, Threaded Tire Clearance: 2.5" Colors: Crimson; 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 Standard: BSA, 73mm, Threaded Tire Clearance: 2.5" Colors: Crimson; Mulsanne Blue |
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Fork | RockShox SID, DebonAir spring, Rush RL damper, lockout, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 120mm travel Travel: 130mm Spring Type: Air | RockShox Pike Select RL3 Air; Custom Charger 3-Mode Damper; 15x110mm Maxle Lite / 42mm offset / Tapered steerer; Lockout / Reb. Adj. / 130mm travel Travel: 130mm Spring Type: Air | FOX FLOAT 34 Rhythm, GRIP damper, two position Sweep adjustment, 15x110mm axle, 44mm offset, 140mm of travel Travel: 130mm Spring Type: Air |
Shock | RockShox Deluxe Ultimate RCT, 185mm x 50mm Travel: 130mm | RockShox Deluxe Select RL3 Trunnion; 3 modes / Lockout-Trail-Descend; Debon Air / Reb. Adj.; Travel 120mm / T165X45mm Travel: 130mm | FOX FLOAT DPS Performance, Rx Trail Tune, rebound and 3-position compression adjust, S1:190x42.5mm, S2-S6: 190x45mm Travel: 130mm |
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 |
Rear Derailleur | Shimano XT M8100, long cage | SRAM GX Eagle 12 Speed | SRAM NX Eagle, 12-speed |
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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 |
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 |
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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 |