Finding wheel adapter spacers for wheel conversion

Hey! I have been given some nice rims and tires for my 04 tundra but they are 2010 sierra factory rims and they seem to have the same specs and offset except for the hub size, which is 78.1 mm for gmc. Is anyone here running a gmc tire on 1st gen tundra or have any knowledge on the matter? Just trying to reach out to find where I can buy some spacers at. Thanks in advance

 

This is one of many wheel/tire related things covered in the 1st Gen Tundra community info megathread. Note the last link here, right after "couple hundo on", this single bullet point is pulled from the "Everyfuckingthing you need to know about wheels and tires and suspension for these trucks" section:

• Wheel fitment (from other Toyotas/Tundras): 2007-2022 Tundras use 5-lug wheels. In 2023, Tundras started using 6-lug axles again, but the hub bore is smaller (95mm on 3rd gen vs. 106mm on 1st gen), so they technically won't work unless you spend a couple hundo on custom-made spacers.