[Application]: Reliable to use, this mountain bike freewheel will index with 7-speed shifter; this freewheel will fit on any mountain, hybrid or road hubs with a threaded drive side
[Fine Workmanship]: High precision thread ensures close connection with the bike hub and smooth operation without much noise
[Save Effort and More Efficient]: This bike cassette can provide fast riding speed with less effort needed; Easy to install,no need to do any adjustment to the derailleur
[High Quality Material]: Bike freewheel is constructed of high strength metal, anti-rust, non-deformation, wear-resistant, high performance of durability
[Warm Note]: Its usually good practice to replace your chain when replacing a worn or damaged freewheel