Velopedia Bicycle Archive
2027 Trek Fuel EX 9.8 Eagle 90
Mountain bicycle from the Velopedia specification archive.
- Original MSRP
- $6,199.99
- Sizes
- S; M; L; XL; XXL
- Colors
- Purple Phaze / Amethyst Marble; Gloss Dark Carmine / Matte Trek Black; Miami Green / Aloha Marble
- Geometry
- 5 manufacturer sizes
- Archive ID
- 900000736
Current market
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Velopedia analysis
What the specifications mean
Suspension at both ends means fork and shock setup should be considered together; mismatched sag or rebound can leave the front and rear reacting very differently. The 520% cassette range describes the available gearing more clearly than the component-group name alone. Hydraulic disc brakes shift routine service toward pad and rotor condition, fluid leaks and use of the correct bleed fluid.
Suspension setup
Front + rear
Fork and shock pressure, sag and rebound should be balanced and recorded independently.
Gearing
520% cassette range
Calculated from the published 10–52-tooth sprocket span.
Brake service
Hydraulic disc
Pad and rotor condition plus the correct bleed fluid are the primary service checks.
Frame material
Mixed materials
Composite impact checks and metal-joint inspection both apply.
Used-bike inspection
If you’re buying this bike used
Before any test ride: both brakes should stop the bike firmly and release cleanly; both wheels should run true and be securely attached; tires should have no casing damage; and the headset, handlebar, stem, cranks and pedals should have no looseness or play.
Follow the full used-bike inspection order →- FrameInspect the composite sections for impact or clamp damage, then check the metal joints and welds for dents or cracking. Ask about any crash history.Inspect the frame and fork →
- BrakesBoth levers should feel firm and return cleanly. Check for fluid around the levers and calipers, inspect pad thickness and contamination, and look for worn or bent rotors.Inspect the brakes →
- SuspensionAsk when the fork and shock were last serviced. Check the stanchions for damage, look for oil at the seals, cycle both units through their travel and test the suspension pivots for play.Evaluate the suspension →
- DrivetrainShift through every gear under light load and measure chain wear. Confirm that the shifter, derailleur, chain and cassette belong to the same 12-speed system.Check drivetrain wear →
- Bottom bracketTurn the cranks slowly, feel for rough bearings and check for side-to-side play. Creaking under load deserves investigation but does not identify the source by itself.Inspect the bottom bracket and shell →
Bike-specific inspection checklist 19 checks based on 5 archived component groups Open checklistClose checklist
This checklist uses the archived equipment for this bike. It cannot confirm the condition, service history or later component changes of the example in front of you.
Identity and fit
Follow the full used-bike inspection order →Archived: 2027 Trek Fuel EX 9.8 Eagle 90 · Mountain · Published sizes: S; M; L; XL; XXL
Frame and fork
Inspect the frame and fork →Archived: Frame: Carbon fiber · Fork: RockShox Lyrik Ultimate, DebonAir+ w/ ButterCups, Charger 3.1 RC damper, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 150mm travel
Suspension
Evaluate the suspension →Archived: Fork: RockShox Lyrik Ultimate, DebonAir+ w/ ButterCups, Charger 3.1 RC damper, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 150mm travel · Rear shock: RockShox Deluxe Ultimate RC2T, 205mm x 60mm
Drivetrain
Check drivetrain wear →Archived: Group: SRAM Eagle 90 T-Type, 12-speed · Rear derailleur: SRAM Eagle 90, T-Type · 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 · Bottom bracket: SRAM DUB MTB Wide, 73mm, BSA threaded · Cassette: SRAM Eagle XS-1275, T-Type, 10-52, 12 speed · Chain: SRAM GX Eagle, T-Type, 12 speed
Brakes
Inspect the brakes →Archived: Brakes: SRAM Maven Bronze 4-piston hydraulic disc
Controls and contact points
Archived: Headset: 1-1/8'' threadless, sealed cartridge bearings · Handlebar: Race Face Turbine, alloy, 35mm, 40mm rise, 780mm width · Stem: Bontrager Elite, 35mm, 0 degree, 45mm length · Saddle: Verse Short Comp, steel rails, 145mm width
Before and during the test ride
Follow the full used-bike inspection order →Interpretation based on the archived manufacturer specifications. Confirm exact fit and standards before ordering parts or performing service.
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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 |
|---|---|
| Frame Material | Carbon fiber |
| Fork | RockShox Lyrik Ultimate, DebonAir+ w/ ButterCups, Charger 3.1 RC damper, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 150mm travel |
| Rear Shock | RockShox Deluxe Ultimate RC2T, 205mm x 60mm |
Drivetrain
| Component Group | SRAM Eagle 90 T-Type, 12-speed |
|---|---|
| Rear Derailleur | SRAM Eagle 90, T-Type |
| 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 |
| Bottom Bracket | SRAM DUB MTB Wide, 73mm, BSA threaded |
| BB Shell Width | 73 mm |
| Cassette | SRAM Eagle XS-1275, T-Type, 10-52, 12 speed |
| Chain | SRAM GX Eagle, T-Type, 12 speed |
Brakes
| Brakes | SRAM Maven Bronze 4-piston hydraulic disc |
|---|
Cockpit & Contact Points
| Headset | 1-1/8'' threadless, sealed cartridge bearings |
|---|---|
| Handlebar | Race Face Turbine, alloy, 35mm, 40mm rise, 780mm width |
| Stem | Bontrager Elite, 35mm, 0 degree, 45mm length |
| Saddle | Verse Short Comp, steel rails, 145mm width |
| 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 |
Wheels & Tires
| 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'' |
|---|---|
| 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'' |
| 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'' |
Size-specific frame data
Geometry
Manufacturer-published geometry normalized for consistent archival comparison. Effective top tube and reach remain separate measurements because they describe different aspects of fit.
| Measurement | 15.5" (S) | 17.5" (M) | 19.5" (L) | 21.5" (XL) | 23" (XXL) |
|---|---|---|---|---|---|
| Seat tube | 370 mm | 400 mm | 420 mm | 455 mm | 475 mm |
| Effective top tube | 548 mm | 583 mm | 617 mm | 651 mm | 680 mm |
| Head tube | 95 mm | 110 mm | 125 mm | 140 mm | 155 mm |
| Head-tube angle | 64.6° | 64.5° | 64.5° | 64.5° | 64.5° |
| Seat-tube angle | 78.7° | 78.3° | 77.4° | 76.9° | 76.4° |
| Actual seat-tube angle | 72.7° | 72.6° | 72.6° | 72.6° | 72.6° |
| Chainstay / rear center | 437 mm | 437 mm | 442 mm | 447 mm | 452 mm |
| Wheelbase | 1187 mm | 1225 mm | 1262 mm | 1298 mm | 1330 mm |
| Bottom-bracket drop | 34 mm | 35 mm | 35 mm | 35 mm | 35 mm |
| Bottom-bracket height | 340 mm | 339 mm | 339 mm | 339 mm | 339 mm |
| Reach | 431 mm | 460 mm | 485 mm | 510 mm | 530 mm |
| Stack | 610 mm | 624 mm | 638 mm | 651 mm | 665 mm |
| Standover height | 741 mm | 742 mm | 749 mm | 755 mm | 764 mm |
| Fork offset / rake | 44 mm | 44 mm | 44 mm | 44 mm | 44 mm |
| Front center | 754 mm | 791 mm | 822 mm | 854 mm | 880 mm |
| Trail | 129 mm | 129 mm | 129 mm | 129 mm | 129 mm |
| Wheel size | 29"/27.5" | 29" | 29" | 29" | 29" |
Geometry source: Trek first-party OCC sizing data ↗ Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.
Gallery
Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.