2026 Trek Top Fuel 9.9 XTR Di2 Gen 4 Bike

99 xtr 02.png?VersionId=R4h3Rep3wXhl6QLkF3LyzteecF

bits.png?VersionId=ICRRDccSVrvsmYui2FmRBQz3lfN2qB

storage.png?VersionId=WSrt.zaQCrr0MOB5YUIy9do2ytYv

Trek


$70 standard shipping on bikes (continental U.S. only).	$70 standard shipping on bikes (continental U.S. only). $10,500.00	Buy
Top Fuel 9.9 XTR Di2 Gen 4	Top Fuel 9.9 XTR Di2 Gen 4 $10,500.00	Buy
Top Fuel 9.8 XT Di2 Gen 4	Top Fuel 9.8 XT Di2 Gen 4 $6,799.99	Buy
Fuel MX 9.8 XT Di2 Gen 7	Fuel MX 9.8 XT Di2 Gen 7 $6,499.99	Buy
Fuel+ MX 9.8 XT Di2 Gen 2	Fuel+ MX 9.8 XT Di2 Gen 2 $10,700.00	Buy
Free shipping on orders over $69 (continental U.S. only). International shipping available. Some exclusions apply.	Browse available Bikes
Free U.S. shipping on everything. International shipping available. Some exclusions apply.	Browse available Bikes
Free shipping on orders over $50 (continental U.S. only). International shipping available. Some exclusions apply.	Browse available Bikes

Specifications

Product

Trek Top Fuel 9.9 XTR Di2 Gen 4 Bike

Model Year

2026

Intended Use

Cross Country

Trail

Rider

Unisex

Sizes and Geometry

SM (High, Low)

MD (High, Low)

ML (High, Low)

LG (High, Low)

XL (High, Low)

View Full Geometry

Size	SM (High, Low)	MD (High, Low)	ML (High, Low)	LG (High, Low)	XL (High, Low)
Top Tube Length	558mm, 559mm	587mm, 588mm	611mm, 612mm	630mm, 631mm	672mm, 673mm
Head Tube Angle	65.9°, 65.5°	65.9°, 65.5°	65.9°, 65.5°	65.9°, 65.5°	65.9°, 65.5°
Head Tube Length	105mm	105mm	110mm	115mm	135mm
Seat Tube Angle	76.5°, 76.0°	77.3°, 76.9°	76.6°, 76.2°	76.3°, 75.9°	75.6°, 75.2°
Seat Tube Length	360mm	410mm	420mm	435mm	470mm
Bottom Bracket Height	Drop: 10mm, 16mm	Drop: 26mm, 32mm	Drop: 26mm, 32mm	Drop: 26mm, 32mm	Drop: 26mm, 32mm
Chainstay Length	434mm, 435mm	434mm, 435mm	439mm, 440mm	439mm, 440mm	444mm, 445mm
Wheelbase	1150mm, 1151mm	1188mm, 1188mm	1210mm, 1210mm	1227mm, 1227mm	1270mm, 1271mm
Standover	705mm, 700mm	755mm, 750mm	757mm, 752mm	758mm, 753mm	763mm, 758mm
Reach	422mm, 417mm	452mm, 447mm	467mm, 462mm	482mm, 477mm	512mm, 507mm
Stack	566mm, 570mm	599mm, 603mm	604mm, 607mm	608mm, 612mm	626mm, 630mm
Additional Info	• Geometry adjustable via Mino Link 4 flip chip in lower shock mount • SM has 27.5" wheels; MD-XL have 29" wheels • All specifications listed are with 130mm travel fork with 43mm offset

Sizes Additional Info

• Geometry adjustable via Mino Link 4 flip chip in lower shock mount
• SM has 27.5" wheels; MD-XL have 29" wheels
• All specifications listed are with 130mm travel fork with 43mm offset

View Full Geometry

Size	SM (High, Low)	MD (High, Low)	ML (High, Low)	LG (High, Low)	XL (High, Low)
Top Tube Length	558mm, 559mm	587mm, 588mm	611mm, 612mm	630mm, 631mm	672mm, 673mm
Head Tube Angle	65.9°, 65.5°	65.9°, 65.5°	65.9°, 65.5°	65.9°, 65.5°	65.9°, 65.5°
Head Tube Length	105mm	105mm	110mm	115mm	135mm
Seat Tube Angle	76.5°, 76.0°	77.3°, 76.9°	76.6°, 76.2°	76.3°, 75.9°	75.6°, 75.2°
Seat Tube Length	360mm	410mm	420mm	435mm	470mm
Bottom Bracket Height	Drop: 10mm, 16mm	Drop: 26mm, 32mm	Drop: 26mm, 32mm	Drop: 26mm, 32mm	Drop: 26mm, 32mm
Chainstay Length	434mm, 435mm	434mm, 435mm	439mm, 440mm	439mm, 440mm	444mm, 445mm
Wheelbase	1150mm, 1151mm	1188mm, 1188mm	1210mm, 1210mm	1227mm, 1227mm	1270mm, 1271mm
Standover	705mm, 700mm	755mm, 750mm	757mm, 752mm	758mm, 753mm	763mm, 758mm
Reach	422mm, 417mm	452mm, 447mm	467mm, 462mm	482mm, 477mm	512mm, 507mm
Stack	566mm, 570mm	599mm, 603mm	604mm, 607mm	608mm, 612mm	626mm, 630mm
Additional Info	• Geometry adjustable via Mino Link 4 flip chip in lower shock mount • SM has 27.5" wheels; MD-XL have 29" wheels • All specifications listed are with 130mm travel fork with 43mm offset

Wheel Size

27.5" (650b)

29"

Frame Material

Carbon Fiber

Frame Material Details

OCLV Mountain Carbon front and rear triangles, alloy rocker link, molded chainstay protection, bolt-on dual-density down tube guard

Rear Travel

120mm

Rear Shock

FOX FLOAT Factory, 2-position platform lever, 185mm length x 50mm stroke

Fork

SM: RockShox Pike Ultimate, DebonAir spring, Charger 3.1 RC2 damper, 35mm stanchions, 44mm offset, Maxle Stealth thru-axle
MD-XL: FOX FLOAT 36 SL Factory, EVOL, GRIP X damper, 44mm offset, Kabolt X thru-axle

Fork Travel

130mm

Head Tube Diameter

Tapered, 1.125" top, 1.5" bottom

Headset

Handlebar

Bontrager Line Pro, OCLV Carbon, 780mm width, 27.5mm rise, 35mm clamp diameter

Stem

Bontrager Line Pro, 35mm length, 0° rise, 35mm bar clamp, Blendr compatible

Grips

Trek Line Elite, lock-on

Brakes

Shimano XTR M9220, 4-piston
Rotors: Shimano MT905, 6-bolt, 180mm

Brake Levers

Shimano XTR

Drivetrain

Shifters

Shimano XTR M9250 Di2, 12-speed, electronic wireless

Front Derailleur

None

Rear Derailleur

Shimano XTR M9250 Di2, 12-speed, electronic wireless, long cage

ISCG Tabs

ISCG05 front two bolts

Chainguide

None

Cranks

e*thirteen Helix Race Carbon, 170mm length

Chainrings

e*thirteen Helix Race, 30 tooth

Bottom Bracket

e*thirteen BB20-P, 73mm English/BSA threaded

Pedals

None

Chain

Shimano XTR M9100, 12-speed

Cassette

Shimano XTR M9200, 12-speed, 10-51 tooth

Rims

Bontrager Line Pro 30, OCLV Mountain Carbon, tubeless ready

Hubs

Bontrager Line Pro wheelset, 15mm x 110mm (Boost) front, 12mm x 148mm (Boost) rear with Rapid Drive 108 freehub and MICRO SPLINE driver

Spokes

Bontrager Line Pro wheelset

Tires

SM: Bontrager Gunnison RSL XT, triple compound, aramid bead, 120 TPI, tubeless ready, 27.5" x 2.4"
MD-XL Front: Bontrager Gunnison RSL XT, triple compound, aramid bead, 120 TPI, tubeless ready, 29" x 2.4"
MD-XL Rear: Bontrager Montrose RSL XT, triple compound, aramid bead, 120 TPI, tubeless ready, 29" x 2.4"

Saddle

Trek Verse Short Pro, carbon rails, 145mm width

Seatpost

FOX Transfer Neo Factory dropper, electronic wireless
Drop: 150mm (SM/MD), 175mm (ML), 200mm (LG/XL)

Seatpost Diameter

34.9mm

Seatpost Clamp

Single bolt

Rear Dropout / Hub Dimensions

12mm x 148mm (Boost)

Max. Tire Size

2.5"

Bottle Cage Mounts

One inside front triangle, plus accessory mounts under top tube

Colors

Dark Star

Warranty

Lifetime frame and rims; 2 years Trek/Bontrager parts, suspension linkage components, and paint/decals

Weight

28 lb 14.1 oz (13,100 g)

Miscellaneous

• ABP (Active Braking Pivot) rear suspension design
• SM has 27.5" wheels; MD-XL have 29" wheels
• Geometry (High/Low) and rear suspension leverage rate (More/Less progressive) adjustable via Mino Link 4 flip chip in lower shock mount
• All sizes compatible with mixed ("Mullet") setups (29" front, 27.5" rear) by using 140mm travel fork and Mino Link 4 flip chip in High position
• Internal frame storage compartment in down tube; includes Bontrager BITS storage bag
• Guided internal cable routing
• SRAM UDH (Universal Derailleur Hanger)
• Convertible to 130mm rear travel with longer-stroke shocks
• Weight listed for size MD
• Frame weight, size MD: 5.5 lb (2500 g)
• Includes Bontrager BITS integrated steerer-tube multi-tool
• Includes Bontrager TLR tubeless rim strips, sealant, and valves

Price

$9,999.99

More Info

Trek website

Review This Product

What do you think?


$70 standard shipping on bikes (continental U.S. only).	$70 standard shipping on bikes (continental U.S. only). $10,500.00	Buy
Top Fuel 9.9 XTR Di2 Gen 4	Top Fuel 9.9 XTR Di2 Gen 4 $10,500.00	Buy
Top Fuel 9.8 XT Di2 Gen 4	Top Fuel 9.8 XT Di2 Gen 4 $6,799.99	Buy
Fuel MX 9.8 XT Di2 Gen 7	Fuel MX 9.8 XT Di2 Gen 7 $6,499.99	Buy
Fuel+ MX 9.8 XT Di2 Gen 2	Fuel+ MX 9.8 XT Di2 Gen 2 $10,700.00	Buy
Free shipping on orders over $69 (continental U.S. only). International shipping available. Some exclusions apply.	Browse available Bikes
Free U.S. shipping on everything. International shipping available. Some exclusions apply.	Browse available Bikes
Free shipping on orders over $50 (continental U.S. only). International shipping available. Some exclusions apply.	Browse available Bikes