Mixing of tires was due to the Dunlop SportsMax rears going baby butt flat in less than 4K miles. The front ones were in better shape so I had to find rear replacements. Found a pair of Supersports at a good price and that's how I ended up that way.
Sizes on the 21's are the stock sizes, 285 and 325s. These were takeoffs from X5Ms.
I stick to the idea that the suspension tune in X5 are for RFTs with the stiffer walls. The wobblyness should be due to the NRFTs softer walls.
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