push thru center caps are compatible?

[jujaku]

hello all.

i got used pro comp wheel set.
they are lil beat up but straight and $150 for all four.
i think it is model 89 flat black...
anyway, they don't come with center caps.

as far as i understand, these wheels take push through(thru) center caps.
searching original ones but it is about $20 per piece and don't make sense for $150 set for $80 for center caps.
obviously, it is 6x5.5 and manufacturer stated 4.25 inch diameter.
on ebay, there are some cheap generic caps for 4.25 in size with a lot cheaper.
any push thru caps are interchangeable/compatible as long as they are in 4.25 size?
any input will be appreciated.

thanks.

 

[jujaku]

and it is 18x9 et -6mm size.
would you recommend 265 or 275 tires? or even wider?
currently have 16x8.5 et+18 (i think. never took them out to check) and tires are 265 75 16

 

[YukonXL04]

I'm running 275/65r18 on mine. Fit great.

As for the center caps. Look at them. If they have the same size lip the hold on with. If the od is the same then you should be good.