Evolved from its Slash Gen 6, the Trek Slash+ features a TQ HPR50 mid-drive motor and 580wh battery pack. Rated at 50Nm, this mid-drive motor generates 250w of continuous pedal assistance, which peaks at 300w when required. The bike also runs TQ’s new and largest 580Wh battery.

Trek’s product team chose the TQ HPR50 motor specifically for its compatibility with the Slash platform’s 170mm high-pivot suspension design and a discreet acoustic signature. In testing, the TQ HPR50 provided pedal assistance at less than half the acoustic resonance of many rival e-bikes. 

2024 trek slashplus hero.jpg
2024 trek slashplus hero (Image Credit: Farrelly Atkinson)
2024 trek slashplus hero.jpg, by Liam Mercer

Unlike the Slash 29er, the Slash+ is only configurable with MX wheels, and 27.5in wheels in the smallest frame size. Other differences between Slash and Slash+ are the absence of an ML size and the Mino-link geometry-adjustment chip. Unlike the unassisted Slash, the Slash+ does offer geometry adjustment but via headset cups, which provide around a full degree of head angle adjustment. 

Built for big terrain

True to Trek’s Slash platform heritage, the Slash+ is designed for demanding descents. Whether rolling down raw enduro trails or black diamond bike park sections, the combination of 170mm of fork and rear-suspension travel should deliver all the trail-taming traction you need. 

2024 trek slashplus motor.jpg
2024 trek slashplus motor (Image Credit: Farrelly Atkinson)
2024 trek slashplus motor.jpg, by Liam Mercer

An interesting feature of the Slash+’s high-pivot design is the comparatively large 19T upper-idler wheel. Trek’s designers chose this idler specification to reduce pedal kickback while introducing a rearward axle path.

Matching the potential of the high-pivot suspension system are geometry numbers chosen to place the rider in a balanced and confident position when descents get really steep and challenging. The Slash+’s default head angle is a very slack 63.5 degrees, with 448mm of reach on a size medium. Riders who wish to over-fork the Slash+ can go up to 190mm using single-crown forks only. 

Riders planning to use their bikes on extreme descents can use the headset adjustment cups to slacken the Slash+’s head angle to 62.6-degrees, which is more aggressive than many downhill bikes. 

Trek values the benefits of size-specific chainstay lengths in balancing responsiveness, agility, and stability. The Slash+ size small features 434mm chainstays, which grow to 440mm in sizes medium and large, peaking at 445mm in the Slash+ extra-large. 

The Builds 

Trek’s Slash+ is available in two build options. At £7,500, the Slash+ 9.7 features a Fox Rhythm 38 paired with Fox’s Performance Float X shock. It rolls Bontrager Line Comp 30 wheels shod with 2.5in width Bontrager XR5 Team Issue tyres. The drivetrain and brakes on the Slash+ 9.7 are a mix of Shimano XT/SLX, with brakes being four-piston M6120s. The Slash+ 9.7 weighs 20.38kg (44.94lb). 

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2024 trek slashplus shock (Image Credit: Farrelly Atkinson)
2024 trek slashplus shock.jpg, by Liam Mercer

The upgrade to Trek’s £11,000 Slash+ 9.9, changes most of the components spec from Fox/Shimano to RockShox/ SRAM. Slash+ 9.9 has a RockShox ZEB Ultimate fork and brand-matching Vivid Ultimate shock. The drivetrain upgrades to SRAM’s wireless AXS T-Type system in the XO-grade, with brakes being SRAM Maven Silvers. 

Completing the Slash+ 9.9’s premium build are enhanced wheels and tyres. It rolls carbon Bontrager Line Pro 30 wheels with Bontrager Team Issue tyres, SE6 front and SE5 rear. Curiously, the Slash+ 9.9’s 20.88kg (46.04lb) build weight is heavier than the less expensive 9.7. 

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