different piston rings

[win1906]

just learning about the different rings on a ca77.so i bought 13040-266-000 rings and they were too fat.so i need 13040-275-000.but i see 13042-275-000 will also fit but they are chrome.so what is the difference between the regular and the chrome.any help would be greatful thanks

[DJM]

Generally, Chrome rings will last longer but may take longer to 'bed in'

[easy305]

I also bought the fatter ones but a good machine shop i have used before ground them down for me