Rear Derailleur 5 Speed RDM-15-LB Direct Black Sun Race. Rear Derailleur 5 Speed RDM-15-LB Direct Black Sun Race. 5 Speed RDM-15-LB Direct Black Sun Race With/Removable Hanger We carry over 3,000 bicycle parts and accessories. If you have any questions about any of our parts, please send us an email.