Carbon endurance road bike Trek Domane SL 6 Gen 4: 105 Di2 for the mountains, rear IsoSpeed, 8.89 kg in size 56

Trek Domane SL 6 Gen 4: electronic shifting for climbing cols

With its OCLV Series 500 carbon frame with rear IsoSpeed and its Shimano 105 Di2 2x12 drivetrain, the Trek Domane SL 6 Gen 4 weighs 8.89 kg in size 56 and rolls on Aeolus Elite 35 carbon wheels. The Ivy Smoke paint, a dark ivy green with smoky highlights, gives it an elegant, understated look. It targets the sportive rider who loves the mountains and wants a precise bike on long climbs.

Technical specifications

Who is it for?

For the weekend climber preparing for a mountain sportive, the cyclist who often rides alone on long loops and wants consistently clean shifts, or anyone looking for electronics without going as far as Ultegra. This colour is available here in 54 and 56, for riders from 168 to 180 cm.

The LVR workshop view

OCLV carbon, Trek's signature. Behind the OCLV acronym, for Optimum Compaction Low Void, lies a moulding process in which the carbon sheets are pressed at high temperature until the microscopic bubbles are driven out. Trek has been refining this method since 1992, and the series printed on the tube shows how far it has been taken: for equal strength, a higher series needs fewer fibres. All OCLV frames benefit from the brand's lifetime warranty.

On the climbs, Di2 proves its worth: you change sprocket under full load without any crunching, with a simple press, even when your hands are tired after the third col of the Caroux. The 50/34 paired with the 11-34 leaves a bail-out gear for the steepest sections, and the KVF post flexes just enough when you stay seated for a long time.

On the descents, the 160 mm rotors and the carbon fork with thru axle give stable braking down towards Lamalou-les-Bains, while the Kammtail tubes reduce wind drag on the long fast stretches of the Minervois. In the workshop, we check the Di2 battery and firmware at every service, as well as the pads after a season of cols.

Which Domane should you choose?

Our take: the SL 6 Gen 4 keeps IsoSpeed, integrated storage and Shimano Di2, while the Gen 5 SL 6 AXS switches to SRAM, weighs 8.64 kg in ML against 8.89 kg in 56 here and takes 40 mm tyres. If every gram counts, the SL 7 Gen 4 drops to 8.42 kg in 56.

Your questions

Why buy from LVR Cycles? As the Trek retailer in Béziers, LVR Cycles builds your Domane SL 6 Gen 4, programmes the Di2 to suit your habits, dials in your position and takes care of servicing between seasons in the mountains.

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