Trek Domane SLR 7
The endurance bike gets smoother
here are no cobbles where I live. But, of course, there are crummy roads. I took the Trek Domane slr 7 to one of the crummiest in my area. In fact, the last time I was on this road was probably three years ago. The cracks and potholes had bashed me around so much that I decided the road wasn’t worth riding. To my surprise, the street was now getting resurfaced. On two of the four lanes, road crews had scraped away the top 3 cm of asphalt leaving the perfect testing ground for the rear and front Isospeed, Trek’s mechanical methods of managing road vibrations. The road surface was rough, but consistent in its bumpiness. When the Domane debuted in 2012, it had the Isospeed decoupler, which allowed the seat tube a greater amount of movement between the tops of the seatstays. The Isospeed decoupler on the latest Domane, launched this past spring, is adjustable. Loosen a bolt on the seat tube to free up a slider. If you place the slider close to the top tube, you get the least amount of compliance. Move the slider toward the bottom bracket to get maximum compliance. The slider essentially acts as a fulcrum that you use to adjust the leverage on this two-piece seat tube. You can tune your ride to suit your weight and road conditions.
The front Isospeed, in the head tube, debuted on the latest model. “There are three bearings in the head tube,” said Tim Hartung, lead design engineer for composite road frames at Trek. “You have your standard lower bearing. The pivot assembly up top actually has two bearings. In the middle of those bearings, you have this pivot mechanism, which we call Isospeed. That forces the steerer tube to flex fore and aft. It’s like the rear end: you get your fore-and-aft movement in