Radio Solar BMX Race Frame - Pro L 20.75" TT Matt Black / Teal. Our highly anticipated Solar Carbon Fiber Frame is here. Designed and developed in Cologne Germany over a two-year period the Solar is manufactured from the highest quality Torayca Carbon and is incredibly unique with its 100% monocoque 1pc construction. By using a mono-construction we were able to make the frame even stiffer and stronger and create no weak or fatigue points. The Solar frame is laboratory tested and proven to be insanely stiff and lightweight especially under high impact and stress tests. The internal cable routing allows for a super clean setup. Tested by the Raceline team the past x2 seasons and now the frame of choice for many of todays top riders.