An affordable, simple, and well-functioning rear derailleur designed for SHIMANO TOURNEY RD-TZ500 5-6-7-speed drivetrains. Ideal for everyday amateur use. screwed to the frame hook with an Allen screw supports freewheels and 5, 6, 7-speed cassettes SIS indexed gear shifting oblique pantograph actual weight 234 grams the derailleur works with shifters with or without indexing mounting with an Allen screw to frames with a threaded eyelet in the hook adjustable operating range adjustable cable tension low price, simple construction and therefore good quality of work and durability of shimano!