TREK TOP FUEL 8 GEN 4 MTB BIKE 2025 MATTE DARK WEB

The Top Fuel 8 Gen 4 is a nimble alloy trail bike that strikes a balance between quick climbing efficiency and descending confidence. It packs in a versatile 130 mm front and 120 mm rear travel for ripping over rocks and roots without sacrificing power on ascents. It's built from lightweight Alpha Platinum Aluminium that helps save your budget for bike trips, but packs in upgrades where they matter, like a 12-speed Shimano XT and SLX drivetrain, and a Fox Rhythm 34 fork. 

Key Features Trek Top Fuel 8 Gen 4 Full Suspension MTB Bike 2025

• Hydraulic Disc Brakes: Accurate and powerful braking capacity to keep you in control in all weather conditions.
• Frame Storage: The Alpha Platinum Aluminium frame is robust, yet light, and packs in updated internal frame storage for easy access to gear and snacks
• Mino Link: 4-way Mino Link makes it easy to adjust your geometry or leverage rate for how and where you want to ride

Full Specification

• Frame: Alpha Platinum Aluminium, internal storage, tapered head tube, internal guided routing, downtube guard, OCLV Next rocker link, Mino 4 link, ABP, Boost148, 120 mm travel
• Rear Shock: Fox Performance Float DPS, 3-position damper, 185 mm x 50 mm
• Fork: Fox Rhythm 34, Float EVOL air spring, GRIP damper, tapered steerer, 44 mm offset, Boost110, 15 mm Kabolt axle, 130 mm travel
• Shifters: Shimano XT M8100, 12-speed
• Crankset: Shimano Deore M6120, 30T ring, 55 mm chainline, 170 mm length
• Rear Cassette: Shimano SLX M7100, 10-51T, 12-speed
• Chain: Shimano SLX M7100, 12-speed
• Rear Derailleur: Shimano XT M8100, long cage, 51T max cog
• Bottom Bracket: Shimano BB-MT501 BSA
• Pedals: Not supplied
• Rims: Bontrager TLR
• Front Hub: Size: S - Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle, 27.5", Size: M, ML, L, XL - Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle, 29"
• Rear Hub: Bontrager Line Comp 30, Tubeless-Ready, Rapid Drive 54, 6-bolt, Boost148, 12 mm thru axle
• Tyres: Size: S - Bontrager Gunnison Pro XR, Tubeless-Ready, wire bead, 60 tpi, 27.5x2.40", Size: M, ML, L, XL - Bontrager Gunnison Pro XR, Tubeless Ready, dual compound, aramid bead, 60 tpi, 29x2.40"
• Brakes: Shimano 4-piston hydraulic disc, M6100 lever, M6120 calliper, Shimano RT66, 6-bolt, 180 mm
• Handlebars: Bontrager Line, alloy, 35 mm, 27.5 mm rise, 780 mm width
• Handlebar Grips: Bontrager XR Trail Comp, nylon lock-on
• Stem: Bontrager Elite, 35 mm, 0-degree, 45 mm length
• Saddle: Bontrager Verse P3, chromoly rails
• Seatpost: Size: S - Bontrager Line Dropper, 100mm travel, MaxFlow, internal routing, 34.9 mm, 310mm length, Size: M, ML, L, XL - Bontrager Line Dropper, 170 mm travel, MaxFlow, internal routing, 34.9 mm, 450 mm length
• Weight: M - 14.58 kg / 32.15 lbs (with TLR sealant, no tubes), 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, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.

Bike and frame weights are based on pre-production painted frames at time of publication. Weights may vary in final production.

At All Terrain Cycles, we want you to ride with confidence every time. To ensure your bike or e-bike stays in peak condition, here are some essential safety and maintenance tips.

Bicycle Safety 

Always wear a helmet – Safeguard against head injuries by using a properly fitted, safety-certified helmet.

Perform pre-ride checks – Before each ride, verify that brakes, tyres, and gears are in good working order.

Stay visible – Utilise lights and reflective gear when cycling in low-light conditions.

Follow road rules – Ride responsibly and remain aware of your surroundings.

Aftercare for Your New Bike Initial Check-Up (First 50-100 miles)

Gear Adjustment – New cables may stretch slightly; have a qualified mechanic check and adjust them.

Brake & Wheel Check – Inspect brakes for wear and ensure wheels are aligned properly.

Lubrication – Apply chain oil and check bolt tightness to maintain smooth performance.

Tyre Pressure – Regularly monitor to prevent flats and enhance efficiency.

Pedals - Ensure pedals are still tight and correctly fitted.

Routine Maintenance (Every Few Weeks)

Chain Care – Clean and lubricate your chain to minimise wear and prolong its life.

Brake Safety – Check brake pads and responsiveness before each ride.

Tyre Inspection – Look for punctures and ensure correct air pressure.

Handlebar & Stem Alignment – Confirm they are tight and secure to prevent instability.

Frame Safety Check – Look for any signs of damage or cracks.

Pedals - Ensure pedals are still tight and correctly fitted.

Professional Check-Ups

Have your bike serviced at least once a year, or more frequently if you ride often.

Aftercare for Your New Electric Bicycle (e-Bike) Initial Check-Up (First 50-100 miles)

Battery Care – Fully charge your battery (if required) before the first ride and store it in a dry, moderate-temperature environment.

Avoid Overcharging – Unplug the charger once fully charged to extend battery life.

Pedals - Ensure pedals are still tight and correctly fitted.

Routine e-Bike Maintenance (Every Few Weeks)

Motor Inspection – Listen for unusual noises and ensure smooth operation.

Battery & Connection Checks – Inspect cables and connectors for dirt, moisture, or damage.

Pedals - Ensure pedals are still tight and correctly fitted.

Seasonal e-Bike Maintenance

Check Electrical Components – Ensure wires and connections are clean and secure.

Professional Servicing – Have your e-bike inspected at least once a year or every 500-1000 miles for optimal performance.

By following these aftercare guidelines, you’ll help ensure that your bicycle runs smoothly, lasts longer, and remains a joy to ride. Stay safe and enjoy the ride!

Read our full advice

If you have any problems or concerns: Contact All Terrain Customer Services on 01274 588488 or email sales@allterraincycles.co.uk