The brand new Trek Session appears like a Session – solely a mashup of the trendy bikes, and the Session 10 from 2006. That’s as a result of Trek has gone again to their roots of utilizing a excessive pivot design, first with the Trek Diesel, then the Session 10. However with the Session Eight introduction, Trek modified nearly the whole lot with the design, including all of their new applied sciences. That new Session was a sport changer for Trek and led to many wins below legends like Tracey Moseley, Aaron Gwin, Rachel Atherton, and extra.
Now although, Trek has determined it was time to return and look into the advantages of a excessive pivot system. Particularly, the advantages of a extra rearward axle path. The pivot location causes the wheel to maneuver in an even bigger arc, up and away from the bike which provides the wheel extra time to recover from a bump easily. You find yourself with a smoother suspension response, higher traction, and a motorcycle that carries extra velocity by means of tough sections.
However – one of many downfalls of a excessive pivot design has at all times been the quantity of suggestions on the pedals, or pedal kickback. Mainly, because the suspension compresses, it might pull backwards on the chain which trigger the cranks to rotate backwards.
To get rid of the problem, Trek makes use of a reasonably widespread resolution with an loafer pulley situated above the crank. The result’s the brand new bike solely has 5-8° of pedal kickback, whereas the 2018 Session with out a excessive pivot design had 15-27° of kickback.
Progressive suspension – you select
Moreover, the brand new Session will get extra suspension choices with a Suspension Mino Hyperlink. To not be confused with the Mino hyperlink for the geometry, the Suspension Mino Hyperlink permits riders to decide on between a 20 and 25% leverage charge. On earlier Session fashions, this was one thing performed for his or her professional riders, however solely by means of customized hyperlinks and shock extenders. Now, Trek is offering the choice to all riders permitting you to tune the body for rider choice, course wants, air vs. coil shock, and so forth. Apparently, Trek’s racers all went straight for the 25% setting and left it there.
All of the wheel configurations
Talking of Mino Hyperlinks, the mix of the geometry Mino on the seatstay pivot plus the EXT Headset Cup means the Session can run any fashionable wheel measurement mixture. The bikes will ship in a inventory configuration with 29” wheels entrance and rear. However clients may have the choice of operating a mullet arrange with a 29” entrance and 27.5” rear with the Mino Hyperlink within the excessive place, or twin 27.5” wheels with the Mino within the excessive place plus the EXT Headset Cup (whereas utilizing the identical fork).
With each wheel sizes, the utmost tire clearance is 2.6″.
In the event you’ve gotten this far, you’ll have observed that the body is barely provided in aluminum. Throughout testing, Trek claims that their riders really most well-liked the response of the aluminum over the load financial savings of carbon. Will that imply that we received’t see a carbon Session once more sooner or later? We’re not so positive, however for now, it’s aluminum solely.
The Session additionally will get an enormous replace when it comes to sizing. Now shifting to a reach-based sizing system, the Session can be provided in three sizes, R1, R2, and R3. Trek says that the bike suits the identical vary of riders as earlier than, however they did it with solely three sizes. In addition they added “measurement particular chainstays” – solely all three sizes use the identical chainstay. That’s doable for the reason that efficient chainstay size is modified by the place of the pivot.
Regardless that it’s aluminum, there are nonetheless loads of intelligent body options on the Session that riders are positive to like. For people who love the look and advantages of inside cable routing, it’s there. However in the event you desire exterior routing, that’s an possibility too.
A brand new full size Downtube Armor has been created with twin density safety that can also be detachable. That permits for simple alternative ought to it’s broken.
The identical goes for the improved chainstay guard which is twin density and detachable.
Nonetheless using Trek’s ABP rear dropout design, the frames embrace a 180mm publish mount brake that may run as much as a 220mm rotor with the appropriate adapters. Further particulars embrace a 2-bolt ISCG 05 chainguide mount, an 83mm BSA threaded backside bracket, and 56.5mm chainline able to operating 32-38t chainrings.
The Session can be provided in two full bikes, the $6,999.99 Session 9 is the WC duplicate bike, and the $4,999.99 Session Eight is a extra inexpensive starter bike with all the identical options of the upper finish body, however extra inexpensive components.
A body solely with a rear shock can even be an possibility for $2,999.99, which incorporates the prolonged cup wanted for a full 27.5” construct. If you buy an entire bike as a 29er and need to change to 27.5” wheels, you’ll need to buy the EXT Headset Cup as an aftermarket half.