This entertaining cycle race game is great fun but the Chance Cards are really not needed. I have the original Dutch edition, Homas Tour, and a lack of Dutch made the cards impossible for me to read. Here is how I got round the problem.
Take the Chance Cards out, you won't need them.
When rolling a 7 you do the following; a) If you are among the first 4 riders, you roll two dice and lose the amount of the higher. b) If you are among the rear 4 riders, you roll two dice and gain the amount of the higher. c) If you are in the middle group, you roll two dice. If the total is ODD you lose the amount of the lower die. If the total is EVEN you gain the amount of the lower die.
In addition to the above, a player rolling a 7 also rolls a 10 sided die. If the roll is a 1, a fall occurs with each rider involved missing a turn (see rules regarding falls and adjacency to other riders).