Simplify the following text for a Grade 6 native English-speaking person.
Original: Teams are supplied by the sole tyre supplier ( currently Pirelli which replaced Bridgestone in 2011 ) , and receive two different types of slick dry tyre compounds : Prime tyres ( either Hard or Medium compounds ) , and Option tyres ( Soft and Super-soft compounds ) .
Simplified: Teams are supplied with tyres from Bridgestone . They receive two different types of slick ( have no tread ) dry weather tyre compounds .