Brand: Sunshine
Teeth Number: 11-12-13-14-15-17-19-21-23-25T
Weight: 248g
WHEN DO YOU NEED A NEW CASSETTE
Cassette sprockets could do some serious affect to your shifting exprience.If the sprockets wear out,they will no loger provide good shifting control.Even make terrible noises under pressure or eventually speed the wear-out of the chain and chainrings. So you need to check the index group set wearout situation and ready to replace the old parts with new ones.
One thing you need to know is that when you change the cassette,you should change the chain together.Because the loerchain would be stretched longer than the new chain and that will cause the queaks and noises.If you keep use the old chian the noise would dissappear later,however the life of the cassette would be much shorter.