4" Cognito Lift w/ UCAs, what type of wheel should be run?

[smarquis]

Is anyone else out there running a 4" Cognito lift with 325/60R20s? I have 20" MB Razor wheels and found out that the off-set of 25mm is apparently not right. So I am running spacers up front til I get new wheels so I don't destroy my new UCAs.

Just wondering if anyone else has some good advice. If I have to get new wheels, I may even drop down another size and go to 18" wheels. Tired of spending the extra money as quickly as I go through tires!

Anyone got any good advice?

Thanks!

 

[DIESELMAFIAPER.LB7]

Why can't you run a 25mm offset is that a positive offset or negative I have a negative 25mm offset stock height with cognito uca's or is it the lift spindle giving you grief?

 

[smarquis]

Tell you the truth I don't know really know. I think the Cognito says that there is a max of 5.5 inche backspacing? LOL. These are my wheels: http://www.discounttire.com/dtcs/wheels/mb_wheels/size/viewProductDetail.do?pc=58147
What are you running?
Thanks.

 

[smarquis]

Did some more research and I have a 25 mm positive offset on my 20x8.5" Razors. It appears that I need to change that and either go with an 20x8.5 inch wheel with about 6-12mm offset, or a 9" wheel with 0-6mm offset. I want to get enough of a change in the offset/backspacing that I don't rub on the new UCA, but I'm afraid if I go with a negative offset that I may get rubbing somewhere else.

Anyone else already do this, and if so did you find a solution?

Thanks.

 

[jonathancasey19]

I'm not sure ab offset but 5.5" backspacing is correct. Only lift out there with fabricated spindle that allows most b/s. I was lucky bc my rims I already had were 5.2" and wouldn't work with a tuff country.

 

[smarquis]

What tires are you running Jonathan? I understand that makes a big difference too. As does the trimming that has been done.

 

[jonathancasey19]

They are 35x12.50 mickey thompson atz's. Love em. 2nd set.

One thing I forgot to mention after the cognito 4" was installed, I went back to stock rims & 285's for winter. The tire would just barely scrub the UCA. Got a set of 1/4" wheel spacers from Fred @ Wheel Adapter.

 

[smarquis]

I had a set of those same tires a couple of years ago. They worked great, but seemed to wear pretty fast on my truck. I still haven't found the perfect tire, but I have been pretty impressed by my Pirelli ATR 325/60R20s. Got just a hair over 30,000 miles with them and that is a lot for my tires. Kind of weird issue though is that one tire has worn faster than the rest, and if it wasn't for that tire, I may get another 10,000 miles from these...

 

[whitetrash21]

Yokohama Geolander AT/S.... 50k+ miles on them and I don't baby the truck. Those are miles hauling trailer, off road, and track .... I was impressed with them.

 

[smarquis]

Yokohama Geolander AT/S.... 50k+ miles on them and I don't baby the truck. Those are miles hauling trailer, off road, and track .... I was impressed with them.

What size are you running Whitetrash?

 

[whitetrash21]

Those were 285/75-16.......

 

[intropiles]

Is anyone else out there running a 4" Cognito lift with 325/60R20s? I have 20" MB Razor wheels and found out that the off-set of 25mm is apparently not right. So I am running spacers up front til I get new wheels so I don't destroy my new UCAs.

Just wondering if anyone else has some good advice. If I have to get new wheels, I may even drop down another size and go to 18" wheels. Tired of spending the extra money as quickly as I go through tires!

Anyone got any good advice?

Thanks!

For mine, I used an 25mm. I don't have any troubles with it.