Sasha had an unfortunate experience with his Nagasawa a while back. Rust had taken over his chainstays, fork crown, head lugs, bottom bracket, seat tube and downtube. While most people would have just thrown the frame away, Sasha contacted Nagasawa who replaced the tubes that were damaged and even reinforced the delicate Keirin frame for street riding. Seriously, his bike has gussets! He also added cable guides!