Velopedia Bicycle Archive

Compare Bicycles

Compare published geometry, gearing and specifications for up to three bicycles.

1 of 3

Evidence-backed comparison

Meaningful differences

Prioritized by consequence. Small differences remain in the complete table below, and missing specifications are never treated as equal.

  1. Fit

    2027 Trek Fuel EX 9.8 Eagle 90 has 35 mm more reach than 2025 Specialized Stumpjumper 15 Expert in the selected sizes.

  2. Fit

    2027 Trek Fuel EX 9.8 Eagle 90 has 11 mm more stack than 2025 Specialized Stumpjumper 15 Expert in the selected sizes.

  3. Gearing

    2027 Trek Fuel EX 9.8 Eagle 90 has a 6% lower climbing ratio than 2025 Specialized Stumpjumper 15 Expert.

  4. Equipment

    2027 Trek Fuel EX 9.8 Eagle 90 has 10 mm more front travel than 2025 Specialized Stumpjumper 15 Expert in the selected sizes.

Selected-size geometry

Geometry overlay

Published coordinates from each selected size set the shared scale and bottom-bracket anchor. Manufacturer size labels are shown as published and are not normalized fit equivalents. When a frame outline needs a neutral construction aid because a tube length was not published, it is disclosed below the overlay.

Published drivetrain range

Gearing comparison

Mechanical ratio is chainring teeth divided by rear sprocket teeth. Lower ratios provide more mechanical advantage; higher ratios turn the rear wheel farther per crank revolution.

2027 Trek Fuel EX 9.8 Eagle 9030T · 10–52T · 12-speed
Lowest0.58:1 Highest3.00:1 Total range520%
2025 Specialized Stumpjumper 15 Expert32T · 10–52T · 12-speed
Lowest0.62:1 Highest3.20:1 Total range520%

The bar compares mechanical ratio only. Wheel-dependent speed is shown only when an exact published ISO/ETRTO rear tire size is available; no tire size is assumed.

Complete specification tableOnly rows containing Archive data are shown. Swipe the table horizontally on smaller screens.
Print / PDFCSV
Specification
2027 Trek Fuel EX 9.8 Eagle 90
2025 Specialized Stumpjumper 15 Expert
Overview
Model Year
2027
2025
Brand
Trek
Specialized
Model
Fuel EX 9.8 Eagle 90
Stumpjumper 15 Expert
Bicycle Type
Mountain
Mountain
Original MSRP
$6,199.99
$5,999.99
Colors
Purple Phaze / Amethyst Marble, Gloss Dark Carmine / Matte Trek Black, Miami Green / Aloha Marble
Gloss Gunmetal / White Mountains, Satin Electric Green / Satin Forest Green
Sizes
S, M, L, XL, XXL
S1, S2, S3, S4, S5, S6
Weight
—
14.47kg (31 lb, 14.4 oz)
Frameset
Frame Construction
OCLV Mountain Carbon, internal storage, ZS headset, adjustable leverage rate, guided internal routing, interchangeable alloy rocker link, interchangeable lower shock mount, downtube guard, shuttle guard, BSA 73, ISCG 05, ABP, UDH, Boost148, adaptable travel 145mm-160mm
FACT 11m carbon chassis and rear-end, Trail Geometry, SWAT™ Door integration, head tube angle adjustment, threaded BB, internal brake and dropper cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, SRAM UDH compatible, 145mm of travel
Frame Material
Carbon fiber
Carbon Fiber
Fork
RockShox Lyrik Ultimate, DebonAir+ w/ ButterCups, Charger 3.1 RC damper, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 150mm travel
FOX FLOAT 36 Performance Elite, GRIP X2 damper, HS and LS rebound and compression adjustment, 15x110mm QR axle, 44mm offset, S1:140mm of travel, S2-S6:150mm of travel
Rear Shock
RockShox Deluxe Ultimate RC2T, 205mm x 60mm
FOX FLOAT Performance Elite with Specialized GENIE Shock Tech, Ride Dynamics Trail Tune, 2-position lever w/3 setting Open mode tuning range, LSR adjustment, S1:210x52.5mm, S2-S6:210x55mm
Drivetrain
Component Group
SRAM Eagle 90 T-Type, 12-speed
—
Shifters
—
SRAM AXS POD Controller
Rear Derailleur
SRAM Eagle 90, T-Type
SRAM GX Eagle Transmission Derailleur
Crankset
S, M, L, XL, XXL: SRAM Eagle 90, DUB, 30T steel, T-Type, 55mm chainline, 170mm length / S, M, L, XL, XXL: SRAM Eagle 90, DUB, 30T steel, T-Type, 55mm chainline, 165mm length
SRAM GX Eagle Crankset, 32T ring, Integrated Guard, 55mm Chainline, S1-S3:165mm, S4-S6: 170mm
Bottom Bracket
SRAM DUB MTB Wide, 73mm, BSA threaded
SRAM DUB, BSA 73mm Wide, Threaded
BB Shell Width
73 mm
73 mm
Cassette
SRAM Eagle XS-1275, T-Type, 10-52, 12 speed
SRAM GX Eagle Transmission Cassette, 12spd, 10-52t
Chain
SRAM GX Eagle, T-Type, 12 speed
SRAM GX Eagle Transmission Flattop Chain
Brakes
Brakes
SRAM Maven Bronze 4-piston hydraulic disc
(F) SRAM Maven Bronze, 4-piston caliper, hydraulic disc, 200mm HS2 Rotor / (R) SRAM Maven Bronze, 4-piston caliper, hydraulic disc, S1-S2: 180mm, S3-S6: 200mm HS2 Rotor
Cockpit & Contact Points
Headset
1-1/8'' threadless, sealed cartridge bearings
—
Handlebar
Race Face Turbine, alloy, 35mm, 40mm rise, 780mm width
Specialized, 6000 series alloy, 6-degree upsweep, 8-degree backsweep. S1-S2: 780 width, 20mm rise: S3-S4: 800 width, 30mm rise: S5-S6: 800 width, 40mm rise
Stem
Bontrager Elite, 35mm, 0 degree, 45mm length
Alloy Trail Stem, 35mm bar bore
Saddle
Verse Short Comp, steel rails, 145mm width
Bridge Comp, Hollow Cr-mo rails, S1-S2: 155mm, S3-S6: 143mm
Seatpost
S: Bontrager Line Dropper, 150mm travel, MaxFlow, internal routing, 34.9mm, 410mm length / M: Bontrager Line Dropper, 170mm travel, MaxFlow, internal routing, 34.9mm, 450mm length / L, XL, XXL: Bontrager Line Dropper, 200mm travel, MaxFlow, internal routing, 34.9mm, 515mm length
PNW Loam Dropper, tool-less travel adjust, Range lever, 34.9, S1: 125mm, S2: 150mm, S3: 170mm, S4-S6: 200mm
Wheels & Tires
Hubs
—
(F) DT Swiss 370, 15x110mm, 28h / (R) DT Swiss 370, 12x148mm, 28h
Wheels
(F) Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 29'' / (R) S: Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, SRAM XD freehub, Boost148, 12mm thru axle, 27.5'' / M, L, XL, XXL: Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, SRAM XD freehub, Boost148, 12mm thru axle, 29''
—
Rims
—
Roval Traverse, hookless alloy, 30mm inner width, tubeless ready, Front: 29, Rear: S1-S2: 27.5, S3- S6: 29
Spokes
—
Sapim Force
Front Tire
S: Maxxis Minion DHR II, tubeless ready, 3C, EXO+ casing, MAXXTERRA, folding bead, 27.5x2.5'' / S, M, L, XL, XXL: Maxxis Minion DHF, tubeless ready, 3C, EXO+ casing, MAXXGRIP, folding bead, 29x2.5'' / M, L, XL, XXL: Maxxis Minion DHR II, tubeless ready, 3C, EXO+ casing, MAXXTERRA, folding bead, 29x2.5''
Butcher, GRID TRAIL casing, GRIPTON® T9 compound, 2Bliss Ready, 29x2.3"
Rear Tire
S: Maxxis Minion DHR II, tubeless ready, 3C, EXO+ casing, MAXXTERRA, folding bead, 27.5x2.5'' / S, M, L, XL, XXL: Maxxis Minion DHF, tubeless ready, 3C, EXO+ casing, MAXXGRIP, folding bead, 29x2.5'' / M, L, XL, XXL: Maxxis Minion DHR II, tubeless ready, 3C, EXO+ casing, MAXXTERRA, folding bead, 29x2.5''
Eliminator, GRID TRAIL casing, GRIPTON® T7 compound, 2Bliss Ready, S1-S2: 27.5x2.3, S3- S6: 29x2.3"
Wheel Size
—
29/27.5; 29/29
Geometry · choose a size for each bicycle
Geometry size
Reach
485 mm
450 mm
Stack
638 mm
627 mm
Effective top tube
617 mm
595 mm
Head-tube angle
64.5°
64.5°
Seat-tube angle
77.4°
77°
Actual seat-tube angle
72.6°
—
Seat tube
420 mm
405 mm
Head tube
125 mm
110 mm
Chainstay / rear center
442 mm
435 mm
Wheelbase
1262 mm
1213 mm
Bottom-bracket drop
35 mm
38 mm
Bottom-bracket height
339 mm
337 mm
Standover height
749 mm
745 mm
Fork offset / rake
44 mm
44 mm
Front center
822 mm
780 mm
Trail
129 mm
130 mm
Wheel size
29"
—

Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run.

Scroll to Top