Problems with 2021 4Runner TRD Pro wheels install

Ok here’s a new one. I bought a set of the redesigned 2021 T4R TRD Pro wheels from a dealership for my 2020 Tacoma TRD OR DCSB AT. Toyota center bores for both platforms have forever been 106.1, with the same bolt pattern, making them an obviously popular thing to interchange. Yesterday I was having them mounted when we discovered the rear hubs are deeper than the wheels allow by about 1-2mm. The hubs make contact with a taper in the wheel metal before allowing the wheels to correct/properly seat on the drums. This seems a more pronounced issue in the rear. Up front they seem to clear and seat just fine, even over the dust caps. I’m thinking my options are, have the center bore machined 2mm or so deeper, run some bora spacers, or return the damn things. Any one have ideas? I’ll try to post measurements and pictures later today, but the above should describe the issue well enough. Thanks for your help/thoughts/ideas...

 

Somebody a few weeks ago was having bore size issues with the same wheels I believe. I think it ended up being a mismachined batch of wheels.

 

Return those things

 

Oh maybe just a bad batch? I’ll measure them all to see if there are variances. Ffs.

 

They’re about 6hrs alway, bought online and shipped. So that would be somewhat challenging... but maybe my best option.

 

It's probably happening because they were meant for a vehicle with 4 wheel disc brakes.

 

https://www.tacomaworld.com/threads/17-trd-pro-sema-wheels.366951/page-31#post-23248016

 

It happens. My buddy ordered 10 sets of Volk wheels and 4 of the 10 sets had the wrong hub bore.

 

That makes a little more sense with aftermarket

 

There's no defect, you bought wheels designed for a truck with rear disc brakes and you're attempting to put them on a truck with rear drum brakes.

 

Seems as if more folks running these would have issue, https://www.tacomaworld.com/threads/2021-4runner-pro-wheels-ready-for-order.686146/

 

the toyota dealership installed the oem wheels on my truck.....now i'm curious if the rears are seated properly......??!!!

 

also....what could happen if they weren't seated properly and just snugged down af by the lugnuts?

 

Looks like installers are just jamming them on and not noticing or caring about the interference.

 

I’m guessing you’d feel a vibration...

 

Most OEM wheels are made by aftermarket companies. Most commonly Enkei, Rays Engineering (parent company of Volk), and Alcoa.

 

Ah, yah, that makes sense.

 

Try other wheels. If all 4 won’t fit then you ruled out a defective wheel.

 

The last guy I saw with issues had a matching set that were machined wrong. Whoever was running the bore machine that day had it set wrong. Likely a very expensive oops on their part.

 

Yah I’m going to check the depths in a few...