4th gen rims on a 3rd gen

Check the bore size. It is off
Depends on which 4th gen teim wheels are from, check the offset and do the math, including the tire size

 

Ive got a set of TRD wheels and tires from a 25.

Did find this outfit that actually sells adapters for just this purpose...lil spendy tho! Tempting as they are not made in CHYNAH but 400 bucks for 4 spacers is a bit nuts.

https://www.uswheeladapters.com/shop/oldtoyota-newtundra6-5-5/

 

So spacer in the link is 108 mm bore and 55 mm thick. Is wheel bore =95?
Spacer will put your wheels at -25mm, increasing the scrub radius and potentially causing the rubbing.
You can get 0 offset wheels and run fat tires without spacers

 

Not a hubcentric spacer. You use tapered lugs on spacer and new 4g lugs on the wheels.
Ive put wheels up to hubs with about 1.5" spacing and they will end up about like 3rd gen wheels far as offset once spaced out.

 

oem wheels are hubcentric only with flat seat lug nuts and shouldn't be used with lugcentric spacers. i know you can get away with it but its not good practice.

 

ya copy that...gonna call uswheelspacers tomorrow and see if they know min spacing needed...looks like theirs are the safest best bet. Spendy buggers but we will keep this truck till the wheels fall off...cant get a 4cyl 5 speed long bed taco anymore! Every other car on road here (near Bend OR) is a taco so cheap take offs are always available.