Change cassette

I have a 10 speed cassette on my trainer as i was using my summer bike over winter can i put a 8 speed cassette on so i can use my winter bike over summer if i can how easy is it to do

If the trainer has a Shimano compatible freehub body, you will need a Shimano lockring tool and a chain whip. A 12" adjustable wrench is commonly used on the lockring tool (some come with a built in handle). The only difficult aspect is that the lockring can sometimes be extremely tight. If you have a Campagnolo drivetrain then things will get more complicated.

Mant thanks for information