Hey maxtor!!

So right now I'm running 305/70R16s on my TRD wheels which are 7.5" wide. So with the width of the tire being 12.50" on as narrow of a wheel as i'm running, when your aired up on the road, you usually don't have full tire tread contact. Because of this, people like me with narrow wheels sometimes just air down the tires even for regular driving which isn't the nicest ride (a little more soft and bouncy) but at least the tread wear is even. This wouldn't be an issue though with wider wheels.

But with what you're asking about 8" or 9" wide wheels, they would be fine running that size of tire definitely. But running a 10" wheel may be a little too excessive and you'd for sure rub on the UCA without wheel spacers. But with the section width, that wouldn't be as much of an issue with the tire if it has a wheel that is 8-9", what you then have to worry about is what rubs on the body mount. With my setup, I had to do the bmc but I also have Spidertrax 1.25" wheel spacers so that puts the tire even more in the path of rubbing with the bmc so I HAD to have mine done.

But this is what I would recommend for you, go with that tire size but choose a wheel that is 8" or 9" wide. And as for the back spacing of the wheel, I'd do some research here on the forum about that because if you get the right backspacing and wheel dimensions, then you wont need to get the bmc done.

However, a great way to make it so the bmc is unnecessary so you wont rub is to get the castor pushed forward to at least positive 3 degrees and you'll be fine!! They do sell adjustable UCAs such as Light Racing ones I'm running where you can adjust castor with them up to positive 5 degrees castorwhich is unobtainable with stock UCAs. And aftermarket UCAs are also lower profile so you wouldn't have to worry about having a slight rubbing on them. That's the reason I got my wheel spacers is because my setup would've rubbed on the UCA a little.

 

Thanks!

Is this the thread that is supposed to have rim specs?

I read it and failed to see any rim specs for 305/70R16 tires. I'd appreciate if anyone links such post if it exists.

Thanks again!

 

Yes that is indeed the most helpful and informative thread there is!

It does say this following sentence about 305/70R16 tires though:

These tires are a little wider than the 285's. Usually people have rubbing problems at the body mount more than anything and you find lots of people with this size tire use wheel spacers and can get away with it because the tire is still not too tall. Recommended to have a wider wheel than stock FJ wheels because of the width.

But as for specific wheel calculations, the tread explains all about how to figure it out so you're going to need to read the beginning section of that thread carefully and then do some math to figure out what specs you'll need to get for your wheel.

Also, you could just look through the forum at threads like these and find someone else that is running the same setup that you want and then ask them what all they had to do to make their wheel/tire combo work.

http://www.fjcruiserforums.com/forums/wheels-tires/11271-post-all-rims-tires-out-there.html
http://www.fjcruiserforums.com/forums/wheels-tires/161635-im-making-wheel-picture-site.html
fj cruiser wheels tires

 

I saw all that earlier. The ones with 305/70R16 shoes didn't say whether they BMCed, and those who said have BMCed. Anyway, I PMed the hell out of those with such shoes. Will see.

For now, I'm planning to buy the safest 16x9 rim. I cannot return it to the dealer. So it must be something that I can play with by adding spacers later on.

I'm thinking to get something with a positive offset if that is safer as it allows me greater modification space should I opt to use spacers. But if a 0mm offset is pretty safe then I'll go with 0mm as too larger spacers generally worry me.

 

You will need immediately a BMC with 305/70R16 STTs on ET 0 mm wheels. I have driven 33x12.50R17 STTs (about 1/4" smaller and 1/2" wider) on 9x17" ET-6 mm wheels and they rubbed very much, it's not possible to turn wheels to full clock on flat surface!

But this was before any lift, with 3" lift it's maybe possible to drive on flat asphalt, but it will rub very easily.

 

I am running 305/70R16 KM2s on 16x9 ATX Series Artillery's. These rims are positive offset and clear the UCAs by an inch. You will need a BMC though or they will rub there. Other than that they clear everywhere else.

I had the tires on 16x7.5 TRD wheels with Spidertrax to start and I did not like that. They cleared everywhere too but the narrow wheels made the tires look 285s. You are correct for getting wider wheels.

 

I am running 305/70R16 KM2s on 16x9 ATX Series Artillery's. These rims are positive offset and clear the UCAs by an inch. You will need a BMC though or they will rub there. Other than that they clear everywhere else.

I had the tires on 16x7.5 TRD wheels with Spidertrax to start and I did not like that. They cleared everywhere too but the narrow wheels made the tires look 285s. You are correct for getting wider wheels.

Did you mean "negative offset" instead?

Yeah that narrow wheel is sad with a 305. I've already ordered a 16x8 MT Classic III. I hope to not lose much wideness with the 8" width.

 

Sorry, typing on an iphone at 3:13am.

My original TRD wheels were 12mm and I switched to -12mm offset.

Which offset did you order? 0mm or -22mm?

 

0mm. Thing is, I didn't find a MT Classic III wheel with a negative offset. I'll most likely use spacers.

 

Not your setup, but I hope this info is helpful.
My wife put 305/70's on her Trail Team wheels and immediately had rubbing on the UCA's, but not on the BMC. We installed 1 1/4" Spidertrax spacers to push away from UCA's, but created serious rubbing on the body mounts. We had afterhours BMC surgery at Rocktek and eliminated that problem too. It's almost time for tire replacement and we will not go back to a 305/70. We are shopping 295/75's and keeping the factory TT TRD wheels.

 

Sorry to hear that you had a bad experience with that setup!!

I have the same setup but my experience had been pretty positive. I have the TRD wheels and I got 305/70R16s too but I had previously done research here on the forum about the setup so I knew I needed to get the bmc done first and then get the Spidertrax installed when I got the new tires so I wouldn't have rubbing issues and everything worked like clockwork for me.

I personally would go with 305s again but then again, my experience has been positive.

 

Be prepared to cut those ears off.

 

Mickey Thompson Performance Tires & Wheels