Carbon triathlon bike Trek Speed Concept SLR 9 serpentine red: Dura-Ace Di2, 1,522 g frame and 410 g fork

Trek Speed Concept SLR 9 serpentine: time trialling, Dura-Ace style

The Trek Speed Concept SLR 9 in Serpentine shows off a deep, dark red lit up with bright red. On its OCLV Series 800 carbon frame, Trek fits Shimano Dura-Ace Di2 2x12 and Aeolus RSL 51 wheels. Its complete weight is not published by Trek France; go by a frame of 1,522 g painted and a fork of 410 g.

Technical specifications

Who is it for?

For the time trial specialist who races regional and national TTs in their category, and for the non-drafting short-distance triathlete who wants a cutting-edge bike. It is aimed at a demanding rider who pays attention to every adjustment.

The LVR workshop view

OCLV carbon, Trek's signature. The acronym refers to compacting the fibres at high temperature and under strong pressure, a process Trek has used since 1992 to eliminate internal voids. The number that goes with it measures how optimised the layup is. The Speed Concept SLR 9 stays with OCLV 800, like the whole family: Trek did not see the point of using the Madone's OCLV 900, because a time trial bike is judged first and foremost on its drag. The frame is covered by Trek's lifetime warranty.

The key point: switching to OCLV 900 would save a few grams that nobody would feel in a stretched-out position on the flat. Trek's choice focuses the SLR 9's budget on the Dura-Ace Di2 drivetrain and the RSL wheels, where the difference can be felt.

In a time trial, the full-foil fork with integrated calliper and the stem hidden in the cockpit reduce the frontal area to the bare minimum. Hydraulic braking on 160 mm CL900 rotors remains powerful despite this integration, provided the bleed is carefully maintained.

The cranks offered in two lengths per size let you fine-tune the position: in a short time trial, some rouleurs prefer the longer one to push the 52x11; in a triathlon, the shorter one spares the hips. We fit the one that matches your riding.

Which Speed Concept should you choose?

Our take: for pure time trialling, the SLR 9 with its Dura-Ace Di2 is the ultimate; the SLR 9 AXS adds a power meter as standard, useful for pacing your effort on a wind-exposed course.

Your questions

Why buy from LVR Cycles? At LVR Cycles in Béziers, we set up your time trial position, bleed and check the integrated brakes and look after your SLR 9 throughout the season.

Please note that the specifications may be changed without prior notice by the manufacturer, based on the availability of components and other factors.