Tires OEM BMW or GT Radial

HD thrust arms are an improvement without too much sacrifice. Better shocks as well. I’ve found tires make a huge difference with the E39.

Narrow, low-profile tires aren't as forgiving over potholes, especially when riding on the 20" wheels.

I have high praise for their overall quality. I owned a set of Savero HT2 all seasons and ran them on an older Explorer. They wore like iron; outstanding quality.

We tried a set on our HS Civic, then onto my codrivers CS NC. They're notably off pace from other 200tw (down in grip even to the RS-RR), but they wore like iron and communicated at the limit. Very solid for the money.

I have had great luck with GT Radial so far.

Currently running GTRadial Chamiro UHP1 tires and am about to install my 2nd set. They are CHEAP and almost as good at the Direzza Star Specs on my Porsche. I was shocked I got 20k miles out of them, they grip really well and don't get greasy easily at the track.

I have heard good things about GT Radials... I use "Road Hugger GT Eco" (aka Kumho something or other) and they have been great. Low noise, (relatively) good grip for being low rolling resistance.

Gt radial is definitely a cheap option, but I would say they perform decently for the price.

The socal 86 cup is sponsored by them, so they've all I've ever used. They're more like 260tw. But I got 245 r40 17 for like $80 each. They're not the best, but they're the best for the money.

The run flat tires are terrible. They feel like they are made of concrete and the grip is very lacking.