baseline frameThe Baseline BMX Frame is the perfect frame for riders who want to hone their skills before moving up to a professional model. Constructed from 4130 CR MO and a hi ten seat tube, the Baseline provides unmatched durability and clearance for the widest tires, perfect for both street and park riding. Key features of the Baseline BMX Frame: Top tube lengths available 20. 5", 20. 75" and 21" to suit your riding style. 75 head tube angle and 71 seat tube