TOP FUEL 9 GEN 4 IS AN ALLOY TRAIL BIKE THAT'S READY TO BILLY-GOAT UP LONG CLIMBS AND RIP BACK TO THE BOTTOM FOR ANOTHER LAP. IT GIVES YOU THE RUGGED BENEFITS OF A LIGHTWEIGHT ALUMINUM FRAME, PLUS THE UPGRADES YOU CRAVE, LIKE FULLY WIRELESS SHIFTING FROM SRAM'S GX EAGLE AXS TRANSMISSION, 4-PISTON HYDRAULIC BRAKES, AND A 120MM/130MM FOX SUSPENSION PACKAGE.
OVERVIEW
It's right for you if...
You like balance in most things you do – a combination of climbing power and descending confidence, nimble handling and full-suspension comfort, bike budget and component performance. You like the durability and affordability that an alloy frame offers, and want upgrades where they matter most.
The tech you get
An Alpha Platinum Aluminum frame equipped with a 4-way Mino Link lower shock mount for tweaking geometry and suspension leverage rate. A 130mm FOX Rhythm 34 fork with Float EVOL air spring and GRIP damper, plus 120mm of rear travel from a Fox Performance Float DPS shock with a 3-position damper. It's topped off with a wireless electronic SRAM GX Eagle transmission, 4-piston hydraulic disc brakes, a Bontrager Line dropper post, and Tubeless Ready Bontrager Line Comp 30 wheels.
The final word
Top Fuel 9 Gen 4 is built for those who want the best of both worlds. It's a great choice for all-around trail riders who may start the day with a pedal fest, but end it with long descents. It delivers on upgrades where you want them most, like your suspension and groupset, but keeps the price down with an alloy frame.
SPECS
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*Please note - spec applies to all sizes unless listed separately
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| Frameset | |
| Frame |
Alpha Platinum Aluminum, internal storage, tapered head tube, internal guided routing, downtube guard, alloy rocker link, 4-way Mino Link, ABP, Boost148, 120mm travel
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| Fork |
Fox Rhythm 34, Float EVOL air spring, GRIP damper, tapered steerer, 44mm offset, Boost110, 15mm Kabolt axle, 130mm travel
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| Shock |
Fox Performance Float DPS, 2-position damper, 185mm x 50mm
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| Max compatible fork travel | 140mm |
| Wheels | |
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*Wheel front
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*Wheel rear
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| Skewer rear | |
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*Tire
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Size: S
Bontrager Gunnison Pro XR, Tubeless Ready, wire bead, 60 tpi, 27.5x2.40'' |
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Size: M, ML, L, XL
Bontrager Gunnison Pro XR, Tubeless Ready, dual compound, aramid bead, 60 tpi, 29x2.40'' |
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| Tire part |
Bontrager TLR sealant, 6oz
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| Rim strip | Bontrager TLR |
| Max tire size |
Frame: 29x2.50", Fork: See manufacturer
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| E-system | |
| Battery | |
| Drivetrain | |
| Shifter |
SRAM AXS POD
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| Rear derailleur |
SRAM GX Eagle AXS, T-Type
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| Crank |
SRAM GX Eagle, T-Type, DUB, 30T, 55mm chainline, 170mm length
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| Bottom bracket |
SRAM DUB MTB Wide, 73mm, BSA threaded
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| Cassette |
SRAM Eagle XS-1275, T-Type, 10-52, 12 speed
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| Chain |
SRAM GX Eagle, T-Type, 12 speed
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| Max chainring size |
1x: 34T, min 30T
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| Components | |
| Saddle |
Verse Short Comp, steel rails, 145mm width
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*Seatpost
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Size: S
Bontrager Line Dropper, 100mm travel, MaxFlow, internal routing, 34.9mm, 310mm length |
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Size: M, ML, L, XL
Bontrager Line Dropper, 170mm travel, MaxFlow, internal routing, 34.9mm, 450mm length |
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| Handlebar |
Bontrager Line, alloy, 35mm, 27.5mm rise, 780mm width
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| Grips | |
| Stem | |
| Brake |
SRAM Level Bronze 4-piston hydraulic disc
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| Brake rotor | |
| Rotor size |
Max brake rotor sizes - Frame: 200mm, min 180mm, Fork: see fork manufacturer
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| Accessories | |
| Bag | |
| Weight | |
| Weight |
M - 14.38 kg / 31.71 lbs (with TLR sealant, no tubes)
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| Weight limit |
This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).
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SIZING GUIDE
| Size | Rider Height | Inseam |
|---|---|---|
| S |
155 - 165 cm 5'1" - 5'5" |
74 - 78 cm 29" - 31" |
| M |
165 - 176 cm 5'5" - 5'9" |
79 - 83 cm 31" - 33" |
| ML |
173 - 180 cm 5'8" - 5'11" |
81 - 86 cm 32" - 34" |
| L |
177 - 188 cm 5'10" - 6'2" |
84 - 89 cm 33" - 35" |
| XL |
188 - 195 cm 6'2" - 6'5" |
89 - 91 cm 35" - 36" |
All measurements provided in cm unless otherwise noted.
GEOMETRY
| Frame size letter | S | S | M | M | ML | ML | L | L | XL | XL |
| Geometry position | High | Low | High | Low | High | Low | High | Low | High | Low |
| Wheel size | 29" | 29" | 29" | 29" | 29" | 29" | 29" | 29" | 29" | 29" |
| A — Seat tube | 36 | 36 | 41 | 41 | 42 | 42 | 43.5 | 43.5 | 47 | 47 |
| B — Seat tube angle | 69.5° | 69.0° | 70.5° | 70.0° | 70.5° | 70.0° | 70.5° | 70.0° | 70.5° | 70.0° |
| Effective seat tube angle | 76.5° | 76.0° | 77.3° | 76.9° | 76.6° | 76.2° | 76.3° | 75.9° | 75.6° | 75.2° |
| C — Head tube length | $10.50 | 10.5 | $10.50 | $10.50 | $11.00 | $11.00 | $11.50 | $11.50 | $13.50 | 13.5 |
| D — Head angle | 65.9° | 65.5° | 65.9° | 65.5° | 65.9° | 65.5° | 65.9° | 65.5° | 65.9° | 65.5° |
| E — Effective top tube | 55.8 | 55.9 | 58.7 | 58.8 | 61.1 | 61.2 | 63 | 63.1 | 67.2 | 67.3 |
| G — Bottom bracket drop | 1 | 1.6 | 2.6 | 3.2 | 2.6 | 3.2 | 2.6 | 3.2 | 2.6 | 3.2 |
| H — Chainstay length | 43.4 | 43.5 | 43.4 | 43.5 | 43.9 | 44 | 43.9 | 44 | 44.4 | 44.5 |
| I — Offset | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 |
| J — Trail | 11.1 | 11.5 | 12.1 | 12.5 | 12.1 | 12.5 | 12.1 | 12.5 | 12.1 | 12.5 |
| K — Wheelbase | 115 | 115.1 | 118.8 | 118.8 | 121 | 121 | 122.7 | 122.7 | 127 | 127.1 |
| L — Standover | 70.5 | 70 | 75.5 | 75 | 75.5 | 75 | 76 | 75.5 | 76.5 | 76 |
| M — Frame reach | 42.2 | 41.7 | 45.2 | 44.7 | 46.7 | 46.2 | 48.2 | 47.7 | 51.2 | 50.7 |
| N — Frame stack | 56.6 | 57 | 59.9 | 60.3 | 60.4 | 60.7 | 60.8 | 61.2 | 62.6 | 63 |