Your Comparison
The Trek Fuel EX 8 GX, Specialized Stumpjumper Comp Alloy, and YT IZZO Comp are all full suspension trail bikes with high-end components. The Trek has 27.5″ / 29″ wheels, while the YT has a carbon frame.
| MSRP | $3,799 | $3,400 | $2,999 |
|---|---|---|---|
| Online Price | $1 At | $1 At | $1 At |
| Category | Trail | Trail | Trail |
| Weight | 30.4 lbs / 13.8 kg | 28.9 lbs / 13.1 kg | |
| Frame | Aluminum | Aluminum | Carbon |
| Fork | Fox Rhythm Float 34 | Fox Rhythm Float 34 | Fox Rhythm Float 34 |
| Wheel Size | 27.5″ / 29″ | 29″ | 29″ |
| Wheel Material | Aluminum | Aluminum | Aluminum |
| Brake Type | Hydraulic Disc | Hydraulic Disc | Hydraulic Disc |
| Groupset | GX Eagle, X1 | NX Eagle | NX Eagle |
| Drivetrain | 1 × 12 | 1 × 12 | 1 × 12 |
| Gear Range | |||
| Suspension | Full | Full | Full |
| Front Travel | 140mm | 140mm | 130mm |
| Rear Travel | 130mm | 130mm | 130mm |
| Seatpost | Dropper | Dropper | Dropper |
| Brand Site | www.trekbikes.com | www.specialized.com | us.yt-industries.com |
Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more. Learn more
Fuel EX 8 GX
Stumpjumper Comp Alloy
IZZO Comp
| Frame | Alpha Platinum Aluminum, tapered head tube, Knock Block, Control Freak internal routing, downtube guard, ISCG 05, magnesium rocker link, Mino Link, ABP, Boost148, 130mm travel | 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 | |
|---|---|---|---|
| Fork | Fox Rhythm 34, Float EVOL air spring, GRIP damper, tapered steerer, 44mm offset, Boost110, 15mm Kabolt axle, 140mm travel | FOX FLOAT 34 Rhythm, GRIP damper, two position Sweep adjustment, 15x110mm QR axle, 44mm offset,140mm of travel | FOX 34 Float Rhythm 29" | 130 mm | 15QRx110 | 44 mm Rake |
| Rear Shock | Size: XS, S, Fox Performance Float EVOL, 3-position RE:aktiv damper, tuned by Trek Suspension Lab, 210mm x 52.5mm; Size: S, M, ML, L, XL, XXL, Fox Performance Float EVOL, 3-position RE:aktiv damper, tuned by Trek Suspension Lab, 210mm x 55mm | FOX FLOAT DPS Performance, Rx Trail Tune, rebound and 3-position compression adjust, S1:190x42.5mm, S2-S6: 190x45mm | FOX Float DPS Perf. Elite 210 x 55 mm | Remote |
| Bottom Bracket | SRAM DUB, 92mm, PressFit | SRAM DUB, BSA 73mm, Threaded | |
| Headset | Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom | Acros AZX S - M AZX - 586 Block Lock | High Cap, L - XXL AZX - 576 | High Cap | |
| Stem | Size: XS, S, Bontrager Line, 35mm, Knock Block, 0 degree, 40mm length; Size: M, ML, L, XL, XXL, Bontrager Line, 35mm, Knock Block, 0 degree, 50mm length | Alloy Trail Stem, 35mm bar bore | Race Face Aeffect S - M 50 mm Length / L - XXL 60 mm | 35 mm clamp |
| Handlebar | Size: XS, 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 | Specialized, 6061 alloy, 6-degree upsweep, 8-degree backsweep, 30mm rise, 800mm width | Race Face Aeffect 35 20 mm Rise | 760 mm Width |
| Saddle | Bontrager Arvada, hollow chromoly rails, 138mm width | Bridge Comp, Hollow Cr-mo rails, 155/143mm | SDG RADAR MNT YT Custom |
| Seatpost | Size: XS, S, Bontrager Line Dropper, 100mm travel, internal routing, 31.6mm, 345mm length; Size: M, ML, L, XL, XXL, Bontrager Line Dropper, 150mm travel, internal routing, 31.6mm, 440mm length | X-Fusion Manic, infinite adjustable, remote SRL LE lever, 34.9 (S1:100mm, S2: 125mm, S3: 150mm, S4/S5: 170mm, S6: 190mm) | YT Postman 31.6 mm | S 100 mm / M 125 mm / L 150 mm / XL - XXL 170 mm | Matchmaker Remote |
| Pedals | included / inklusive The included pedals were not made for demanding trails or racing. That is why we also offer you quality pedals at an attractive price in the shopping cart. | ||
| Grips | Bontrager XR Trail Elite, nylon lock-on | RockShox TwistLoc Sprint Remote |
| Rear Derailleur | SRAM GX Eagle | SRAM NX Eagle, 12-speed | SRAM NX Eagle 12 - Speed |
|---|---|---|---|
| Crank | Size: XS, S, SRAM X1 Eagle, DUB, 30T steel ring, Boost (52mm chainline), 170mm length; Size: M, ML, L, XL, XXL, SRAM X1 Eagle, DUB, 30T steel ring, Boost (52mm chainline), 175mm length | SRAM NX Eagle, DUB, S1:165mm, S2-S5: 170mm, S6: 175mm, Steel, 30T | SRAM NX Eagle S 170 mm / M-XL 175 mm | 32T | DUB |
| Shifters | SRAM GX Eagle, 12 speed | SRAM NX Eagle, trigger, 12-speed | SRAM NX Eagle 12 - Speed |
| Cassette | SRAM Eagle XG-1275, 10-52, 12 speed | SRAM NX Eagle, 12-speed, 11-50t | SRAM PG1230 Eagle 11 - 50T | 12 - Speed |
| Chain | SRAM GX Eagle, 12 speed | SRAM NX Eagle, 12-speed | |
| Brakes | SRAM G2 R 4-piston hydraulic disc | SRAM G2 R, 4-piston caliper, hydraulic disc, 200mm | SRAM G2 R Rotor CENTERLINE 200 mm / 180 mm |
| Rims | Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle | Roval 29, hookless alloy, 30mm inner width, tubeless ready | DT Swiss M 1900 Spline 29“ x 30 mm| 110 x 15 mm | 148 x 12 mm |
|---|---|---|---|
| Spokes | — | DT Swiss Industry | |
| Front Hub | Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15 mm thru axle | Alloy, sealed cartridge bearings, 15x110mm thru-axle, 28h | |
| Rear Hub | Alloy, sealed cartridge bearings, 12x148mm thru-axle, 28h | ||
| Tires | Size: XS, S, Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 27.5x2.40''; Size: XS, S, Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 27.5x2.60''; Size: S, M, ML, L, XL, XXL, Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120 tpi, 29x2.40''; Size: S, M, ML, L, XL, XXL, Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 29x2.60'' | Butcher, GRID casing, GRIPTON® compound, 29x2.3" | MAXXIS FORECASTER 29“ x 2.35 | EXO | TR |
| Disk Rotors | Size: XS, S, M, ML, L, XL, XXL, SRAM CenterLine, 6-bolt, round edge, 180mm; Size: M, ML, L, XL, XXL, SRAM CenterLine, 6-bolt, round edge, 200mm |