Okay, so I have a pair of Mavic 117 SUP 36-hole rims built on to Shimano Altus hubs (front HB-RM40, rear FH-RM40). There's a seven-speed cassette on there too, but I forgot to do a tooth count. The front wheel has an unknown Michelin tyre on it and the rear has a Tioga Psycho II. Frankly, the...