Slash

mtb

Origin

Slash is Trek's enduro race weapon, born in 2011 as a 160mm 26er evolution of the Remedy and progressively pushed deeper into gravity territory with each generation. Gen 6 (introduced for 2024) was the most radical redesign: Trek abandoned the classic ABP layout for an idler-pulley high-pivot suspension with 170mm rear travel, 170mm fork, and a 63.3° head angle, designed in collaboration with the Trek Factory Racing Enduro team. The high pivot generates rearward axle path under impact, allowing the wheel to move out of the way of square-edge hits — a layout pioneered by Commencal and Forbidden which Trek tuned around its proprietary ABP and progression curve. Frames are produced in both alloy and OCLV carbon. The Slash is benchmarked against the Specialized Enduro, Yeti SB160, Norco Range, and Privateer 161, and has finished on EWS/EDR podiums multiple seasons.

Specifications

Frame: OCLV Mountain Carbon (9.8/9.9) or Alpha Platinum Aluminum (Slash 8); internal storage, UDH, ISCG 05, threaded BSA 73 mm BB
Weight: kg
Drivetrain: 1×12; Shimano Deore/XT/XT Di2 or SRAM GX AXS / X0 AXS T-Type
Brakes: Hydraulic disc; Shimano Deore/XT or SRAM Maven Silver (4-piston enduro brakes)
Wheels: MX mullet: 29" front / 27.5" rear; aluminum or carbon (9.9)
Lineup: Enduro / aggressive trail — Trek's longest-travel pedal bike, above Fuel EX in the lineup

Signature technologies

High main pivot with idler pulley — rearward axle path for superior bump absorption at speed
Dual-pulley chain management system (upper idler + lower guide)
MX wheel configuration: 29" front / 27.5" rear (standard)
Internal frame storage
Angle-adjust headset compatible

The verdict

+Strengths

Exceptional descending capability — multiple reviewers compare it to a DH bike
High-pivot suspension delivers outstanding bump absorption and composure at speed
Better pedaling than expected for a high-pivot enduro bike
Frame adjustability — angle-adjust headset, leverage rate adjust, internal storage
Stiff chassis without harshness

−Weaknesses

Idler pulley and chain guide system adds mechanical complexity, noise, and potential reliability concerns
MBR experienced bent idler — significant reliability concern
Extra chain noise from dual-pulley system
Heavy — 16.5-16.7 kg for complete bikes
Bontrager house-brand wheels and tires not favored by reviewers

Did you know

01Gen 6 Slash was Trek's first production bike with a high-pivot idler pulley suspension design — a significant departure from their traditional ABP layout used across the lineup
02The chain path on Gen 6 runs through TWO extra pulleys (upper idler + lower guide) — creating the characteristic 'extra chain noise' that is a known trade-off of the design
03Pinkbike's field test titled their review 'Rides Like a Session' — comparing the Slash's descending capability to Trek's downhill race bike
04MBR reviewer experienced a bent idler pulley during testing, raising reliability questions despite giving the bike 8/10 for its ride quality
05Trek issued a Quick Service Bulletin for Gen 6 Slash regarding chain dropping problems — bikes may have shipped from factory with incorrect setup
06Standard MX wheel configuration (29" front / 27.5" rear) was a deliberate design choice to complement the high-pivot layout — the smaller rear wheel enhances the rearward axle path benefits

Who it’s for

Enduro racers and aggressive trail ridersRiders prioritizing descending performance above all elseBike park enthusiasts who also want to pedal upExperienced riders comfortable with maintaining complex suspensionRiders on steep, technical, rocky terrain

Buyer’s notes

№ 01

Gen 5 closeout deals offer excellent value — traditional suspension is simpler, lighter, and proven. 160mm/170mm is still very capable. value seekers, maintenance-averse riders

№ 02

The aluminum Slash 8 Gen 6 offers the same high-pivot suspension as carbon models at significantly lower price — the weight penalty is modest for enduro use.

№ 03

Check the idler pulley setup before first ride — Trek issued a service bulletin about chain dropping from factory. The Loam Wolf video explains the fix.

№ 04

Budget for tire and wheel upgrades — multiple reviewers noted Bontrager house-brand components are the weakest link in the spec.

№ 05

The high-pivot idler system requires more frequent inspection and cleaning than traditional designs. Factor in extra maintenance time.

№ 06

Consider the Slash+ e-MTB variant with TQ HPR50 motor if you want the same platform with pedal assist for long enduro days.

Generations

~2016–2019
Gen 1–3 (Early Era)
- Carbon frame, 29" wheels (from Gen 1), traditional ABP suspension, NORBA/EWS-targeted
- Limited data in 99spokes; generations not formally labeled by Trek at this time
~2020
Gen 4
- Updated frame design, modern enduro geometry, traditional ABP suspension
2021–2023
Gen 5
- 29" wheels, traditional ABP suspension, lighter build, Flight Attendant electronic suspension option on 9.9 XX1 AXS model
2024–present
Gen 6
- High main pivot with idler pulley (Trek's first), MX wheels (29"/27.5"), equal 170/170mm travel, dual-pulley chain management, angle-adjust headset, adjustable leverage rate, internal storage, integrated frame protection, UDH, ISCG 05, threaded BSA BB