The Shimano Tourney RD-TY300 Rear Derailleur is a reliable and versatile option for 6/7-speed bikes, designed with a long cage to accommodate a wider range of gear combinations. It comes with a BMX/Track style dropout adapter for added compatibility, and is available in both adapter (-01) and bolt-on (-02) options.

With a top normal spring type, this derailleur offers smooth shifting and reliable performance. It supports a maximum large cog of 34T and a minimum large cog of 28T, with a minimum small cog of 11T and a maximum front difference of 20T. The total capacity of 43T ensures compatibility with various gear setups, making it a great choice for those who need flexibility and performance on a budget. Finished in black, this derailleur is both functional and stylish for any bike.