The distances from groove centre to groove centre are: 1. (at the rear of the car) to 2. (centre): approx. 21 cm 2. to 3. (at the rear): approx. 19 cm The free space between the individual rails is: between 1st and 2nd : approx. 13 cm* between 2nd and 3rd: approx. 9 cm*. * where straps are attached approx. 2 cm narrower
The question is imprecise. Which grooves are meant? Maybe the distance between two bicycles? Most of the information can be found here: https://www.thule.com/de-de...