What materials are good and what do they mean to the racer?
Most race products are made with materials that have a high strength to weight ratio. It is beneficial to keep the weight of your vehicle down as much as possible because mass opposes acceleration. Approved air craft grade materials are the best solution for the racer. For aluminum the grades most widely used are 6061 T6, 2024 T4, and 7075 T6. For steel components Chrome molly is used. Chrome molly comes in several grades such as 4140, 4130, 4340, and 4340 Modified 300 also known as 300M. For most aluminum components 6061 is used having a strength rating around 35000psi. Next is 2024 having a rating of about 45000 psi and the strongest is 7075 having a strength rating of about 75000 psi. Your extreme strength and wear components are made from 7075. High grade sprockets and some engine connecting rods are made from 7075.
