Trek 2018 Top Fuel 9.8 SL 29" MTB Matte Anthracite 19.5

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Trek 2018 Top Fuel 9.8 SL 29" MTB Matte Anthracite 19.5


The Top Fuel 9.8 SL is the full suspension XC mountain bike for riders who want every lightweight advantage. An OCLV Mountain Carbon frame, Bontrager carbon wheels, FOX suspension and lightweight performance parts make this bike the perfect sidekick for serious XC riders who want a lightweight, durable rig for speed and efficiency on race day.

It's right for you if...

You don't want to ride trails, you want to fly across them – and you want a bike that can match you mile for mile through races and marathon single-track sessions. You appreciate the performance advantage of carbon and want a super-light bike with race-level components and suspension.

The tech you get

An OCLV Mountain Carbon frame, a SRAM GX Eagle 1x12 drivetrain with an upgraded carbon crank, carbon Bontrager Kovee Elite wheels with a 54-tooth Rapid Drive hub for fast engagement, 100 mm FOX Performance 32 Float front and rear suspension with remote lockout and Trek's exclusive RE:aktiv XC damper, and a carbon bar and seatpost.

The final word

Light, fast and efficient. The carbon frame, carbon components, and our smartest, fastest and most efficient XC suspension make the Top Fuel 9.8 SL right for riders who want a rocket of a bike to tackle cross-country racing and marathons.

Why you'll love it

  1. This bike wants to go fast – it's built with no-nonsense, high-performance parts designed for flat-out speed
  2. The dual suspension remote locks out both front and rear shocks simultaneously for climbs and sprints
  3. Make it yours: it's fully customisable through Project One
  4. The super-efficient RE:aktiv XC shock offers a unique advantage with tech borrowed from Formula One racing


  • Frameset

    OCLV Mountain Carbon main frame and seatstay, alloy chainstay, ABP, Full Floater, EVO link, E2 tapered head tube, Mino Link, MicroTruss, Control Freak internal routing, Carbon Armor, PF92, Boost148 and G2 Geometry on 29ers, 100 mm travel
    Front suspension
    Fox Performance 32 Float, Step Cast, FIT4 2-position damper (with new push-to-unlock remote), E2 tapered steerer, Boost110, G2 Geometry w/51 mm offset on 29ers, 100 mm travel
    Rear suspension
    Fox Performance Float, RE:aktiv XC 2-position damper (with new push-to-unlock remote), tuned by Trek Suspension Lab, 6.5”x1.5”
  • Wheels

    Bontrager Kovee Elite 23, Tubeless Ready, 54T Rapid Drive, Boost110 front, Boost148 rear (15.5˝: 142x12 rear, 21T), tubeless strips included, valves sold separately
    Bontrager XR2 Team Issue, Tubeless Ready, 120 tpi, aramid bead, 29x2.20˝ (15.5: 27.5x2.20˝)
  • Drivetrain

    SRAM GX Eagle, 12-speed
    Rear derailleur
    SRAM GX Eagle, Roller Bearing Clutch
    SRAM Stylo Carbon Eagle, 32T
    Bottom bracket
    SRAM XG-1275, 10-50, 12-speed
    SRAM GX Eagle
    Not included
  • Components

    Bontrager Montrose Elite, hollow titanium rails
    Bontrager Pro, 31.6 mm, 5 mm offset
    Bontrager Race X Lite, OCLV Carbon, 31.8 mm, 5 mm rise
    ESI Chunky
    Bontrager Pro, 31.8 mm, 7-degree
    Head set
    FSA IS-2, 1-1/8˝ top, 1.5˝ bottom
    Brake set
    SRAM Level TLM hydraulic disc
  • Weight

    17.5" - 10.93 kg/24.10 lbs (with tubes)
    Weight limit
    This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, and materials.
Bike and frame weights are based on Trek pre-production painted frames at the time of publication. Weights may vary in final production

Sizing & fit

Proper bike fit is essential for best performance and comfort. Any size and geometry measurements shown on are for general comparison purposes only. To find your perfect fit, visit an authorised Trek retailer, where an expert skilled at sizing will help you find the appropriate bike and size for your individual needs.


All measurements provided in cm unless otherwise stated.

Frame size number Geometry position ASeat tube BSeat tube angle Effective seat tube angle CHead tube length DHead angle EEffective top tube FBottom bracket height GBottom bracket drop HChainstay length IOffset JTrail KWheelbase LStandover MFrame reach NFrame stack
15.5 in Low 39.4 69.5° 73.5° 10.0 70.0° 55.3 33.0 2.5 42.7 4.7 8.0 106.4 74.7 39.2 56.1
17.5 in Low 41.9 68.5° 74.0° 9.0 70.0° 57.7 33.0 3.9 43.5 5.1 8.0 111.1 73.0 42.7 57.7
19.5 in Low 47.0 68.5° 74.0° 10.0 70.0° 61.1 33.0 3.9 43.5 5.1 8.0 114.4 73.0 45.7 58.7
18.5 in Low 44.5 68.5° 74.0° 9.0 70.0° 59.3 33.0 3.9 43.5 5.1 8.0 112.7 72.4 44.3 57.7
21.5 in Low 49.5 68.5° 74.0° 12.0 70.0° 63.3 33.0 3.9 43.5 5.1 8.0 116.6 73.8 47.2 60.6