First Look: 2015 Trek Slash Carbon 27.5

Versatile and capable all mountain bruiser with carbon frames and innovative spec

27.5 Enduro

Trek Slash 99 Side

Trek impressed us this year with the Slash all mountain bike sporting 27.5 wheels and 160mm of travel. Although the bike was meant for the most demanding World Series Enduro races, we enjoyed the big sweet spot of the bike as it excelled in many types of riding conditions. The adjustable geometry with Mino Link enabled us to lower/raise the BB height and affect the head angle as well. The Fox Talas fork with 130/160mm of travel allowed the bike to tackle flattish, tight singletrack too as the 66 degree head angle could be steepened to about 68 degrees.

But we were left to wonder about the possibilities of a carbon frame, a Pike fork or those new Talas 36 forks. What if?

Well our questions have been answered as Trek showed us the five new 2015 Slash models. The 9.8 has a carbon front triangle and it weighs one lb. less than aluminum. The 9.9 has an all carbon frame for a 1.4 lb. weight savings over aluminum. Two of them are carbon and two are aluminum with the following prices:

Slash 7:  Aluminum frame;  $3,459.99
Slash 8:  Aluminum frame;  $4,199.99
Slash 9:  Aluminum frame;  $n/a
Slash 9.8:  Carbon front triangle; $5,769.99
Slash 9.9:  All carbon frame; $8,399.99

Trek Slash 9.9 Rear Triangle

A big shift is all the models now sport a RockShox Monarch Plus DebonAir rear shock instead of the Fox DRCV shock. RockShox has made huge strides in its rear shock development and Trek felt comfortable that switching to these new shocks would improve their bike. The main improvement is the Monarch Plus has an external oil reservoir and with higher oil volume, more consistent performance can be achieved on the longest and most demanding descents. In addition, the new RockShox shocks offer excellent damping support in its sagged position. Thus even in the wide open mode, the shock is an efficient pedaler with great control throughout its travel. The spring rates of these increased air volume DebonAir cans, mimic the ones of the twin chamber Fox DRCV units as well. So the bike’s ride characteristics are maintained.

Trek Slash Rear Shock Spring Curves

27.5 wheels mated with XR4 tires give these bikes excellent traction on a broad range of conditions. The lower three bikes sport Bontrager wheels, while the 9.9 model is spec’d with DT Spline One wheels. All the bikes use RockShox Pike forks with adjustable travel, except for the 9.9, which uses the fascinating new Fox 36 Talas fork with 130/160mm travel.

Trek Slash 9.9 Crank

The 9.9 model features a Shimano 1×11 drivetrain. Early reports are the chain stays on very well with no chain guide.

Trek Slash 9.8 Side

The 9.8 model retails for $5769 and it sports a carbon front triangle and 1×11 drivetrain

Trek Slash 9.8 Crank

The 9.8 is a looker and a decent value.

Trek Slash 7 and 8

The Trek Slash 7 and 8 are 2×10 bikes with the Trek Slash 9 (not shown) offered in 1×11. The Trek Slash 7 is the one on top in blue color.

Trek Slash with Fox Talas 36

The Trek Slash 9.9 has Shimano 1×11 drivetrain and the very rare Fox 36 Talas with 130/160mm of adjustable travel.

For more information visit

About the author: Francis Cebedo

The founder of mtbr and roadbikereview, Francis Cebedo believes that every cyclist has a lot to teach and a lot to learn. "Our websites are communal hubs for sharing cycling experiences, trading adventure stories, and passing along product information and opinions." Francis' favorite bike is the last bike he rode, whether it's a dirt jumper, singlespeed, trail bike, lugged commuter or ultralight carbon road steed. Indeed, Francis loves cycling in all its forms and is happiest when infecting others with that same passion. Francis also believes that IPA will save America.

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  • Liberty555 says:

    Nice looking bikes! Not quite sure what makes the spec innovative though…
    Those XTR cranks are pure bike porn and I wouldn’t want to get them dirty or scratched up! They would look great on the mantle piece.

  • Francis Cebedo says:

    >>Nice looking bikes! Not quite sure what makes the spec innovative though…

    Every piece is dialed with X1 cranks on the 9.8 with Shimano brakes.

    But we’re most impressed that they switched to Rockshox Debonair rear shocks. they also have adjustable travel Pikes on all models but the highest one. And the 9.9 has an adjustable travel front fork in the Fox 36.

  • Vanguard says:

    Total weights would be interesting, particularly across the model range.

  • mtb says:

    Extremely interesting that Trek didn’t spec a DRCV shock given they own the DRCV patent and had Fox build it for them. Frankly, I’m impressed they would spec a decent RS can, which makes me more likely to consider buying a Trek frame in the future. Trek’s ABP is fairly similar to DW, similar enough that an unsuccessful lawsuit was filed.

  • DubATB says:

    I love Trek Bikes. Maybe I can sell a kidney to buy my next one.

  • ken says:

    I bought the 2015 Trek slash 8 and this bike’s a beast! The suspensions top notch, but the rear derailleur bent before I even got to enjoy it……….

  • sophat says:

    looks fantastic bike and my favorite brand I wish i can get one the next future

  • sophat says:

    I wish it will arrive in my country soon!

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