Proline ExpertOnce your kids have some laps under their belts and they're ready to get more serious about racing, the Redline Proline Expert is ready to take them to the next level. Offering great performance and high quality at a mid level price, the Proline Expert is made with a Redline proprietary aluminum alloy frame with a sealed Euro bottom bracket, aluminum 2 piece cranks, and sealed hubs. The 100 percent chromoly steel race fork with tapered legs helps