I have a Kalkhoff Pro Connect Impulse 10, bought in June last year. The tyres are Scwalbe Marathons, 28 x 1.50, (40x622) and the rims just say 'Concept' - I *think* they are Shuemann Concept SDR light rims, as the Kalkhoff website for the 2015 model mentions Concept SDR. If I read the Shuemann...