Fantasy Cycling

"Each cyclist is associated with a fixed cost in stars and a category according to his characteristics (4 categories: leader, sprinter, climber, polyvalent). You can freely spend your budget in stars by choosing the cyclists you want (8 cyclists) but you cannot exceed 5 all-rounders, 3 climbers, 3 sprinters and 3 leaders in your squad. When you choose a cyclist, your star budget is decreased by the corresponding value.

As long as a rider has not started a stage in your team, you can remove him from your squad to retrieve your stars by clicking on the red cross.

RIDERS'STATUS AND CHANGES IN YOUR TEAM
When signing up, you will have to choose 1 Road Captain whose points won on a stage will be doubled and 7 Teammates within your team. You can change your Road Captain for a stage as long as that stage has not yet started.

Throughout the race, you will have the opportunity to make changes in your team by using credits. You will be able to replace one of your chosen riders with a new cyclist by using 50 credits"

I can't remember how often but every so often you can chose to swap people in/out of the team at the cost of extra points. TBH I generally just pick a team and stick with it.