Challenges have specific entry requirements:
◎Car star level
◎ Entry fee
Only players with the required Car Star Level may enter. For this reason, it's a good idea to keep cars of all star classes in your garage so that you can compete in them all.
High stakes mean high rewards. Challenges payout big trophy rewards so they are well worth entering. The hourglass icon indicates how much time is left in the challenge before it ends. Collect rewards from your inbox when the challenge is over.
You have 10 attempts to lay down the best time possible. Each attempt will remove one pip from the radial indicator icon. Once all 10 attempts have been spent, the Challenge is over and you must await the result.