I have been running a set of 305/50R20 Kumho Ecsta's on the 20" replicas for about 12K miles. They do not handle as well as the 22s due to side wall flex BUT they ride so much better.
Which is the reason I tried them; driving everyday on some rough roads the difference is worth the trade off in the handling departement for me.
You could just run a set of steel wheel spares on the back when you go to the track with DRs on them.
Is there a weight difference between the rims ? I know replicas can be a slight bit more heavy.
I am looking at the nitto NT01 tire to run on the rear.
Man tba 315/35/20 is going to be really small on your truck, they are only 28.7 inches tall vs 31.6 for the 22's. Would give you the same effect as lower gears though. Have you looked at the BFG tires? They are pretty much as soft as DR's
I have thought about looking into the BFG's.
I'm going to look into them a little more.
Not that it will matter a lot with how loud your truck is but I've heard the BFG howl BAD.
I know Yellow446 has them on his truck and he never mentioned anything about them ever howling:dontknow:
I asked this same question a couple of months ago and I didn't get many/any positive responses. I put 6k miles on my truck every year, but I would have no issue at all running Nitto DRs on the street all the time. I have run them on all my street cars as the daily driven tires for years. BFGs will hook better, but will handle like crap. The Nitto DRs are a great tire for more hook than anything you can put on the 22s, and yet the truck will still handle just fine, unless you are into road-racing.
My issue is like one poster above said they are so much shorter than stock that it will basically be like running 4.88s+ gears, and this will screw up the speedo reading, too. My truck is lowered, so I don't think it would look bad to run a little shorter tire, but 3" is a lot. The QC above looks pretty good, I think.