Okay guys need help choosing the right tire size for my new wheels?

I'm ordering 3sdm 0.01s in 20'sx8.5.

Looking at a set of nankang NS-2s 245/40/20 ?

Looking for a tire to go with the wheels and its gonna be bagged also so want the best possible look?

Never really had any experience ordering tires?

Thanks

Anyone no what size caps I would need to go over my alloy wheel Bolt (and locking Bolt) I have an astra gtc 1.7cdti with 18 inch wheels?

Thanks

James


Sent from my HTC 10 using Tapatalk

Looking at getting a pipercross panel filter, only issue is a dont know which size to order. Their website doesnt list the gtc 1.6t as an option

Has anyone added one? Could they point me in the right direction or know the dimensions?

Its the old 1.6T 180 engine.

Thanks in advance guys!