° \[°-°]/ New member Jun 15, 2009 #1 Since there are many varieties of bikes, I know there is no single answer. So let's just say, the maximum horsepower ratings of a BMX bike, a 21-speed mountain bike, and a high speed road bike.
Since there are many varieties of bikes, I know there is no single answer. So let's just say, the maximum horsepower ratings of a BMX bike, a 21-speed mountain bike, and a high speed road bike.
