Tires OEM BMW or SUMITOMO

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'm very happy with my [Sumitomo HTR Z III](https://www.tirerack.com/tires/tires.jsp?tireMake=Sumitomo&tireModel=HTR+Z+III), for an affordable high performance tire. It's not going to last 60k miles, but it was a lot of fun slaying the Tail of the Dragon.

I have been using the Sumitomo HTR A/S P02s for the last 80k (just go 3rd set on front) as a good compromise in price and quality.

I had a good experience with Sumitomo htr a/s p02.

245/40R-18 Sumitomo HTR A/S P02 on Motegi Racing Mr140

running 40psi, when i go to the track, i keep it at about 38 and check and let out hot air as i go each lap, ill go from 35 to 50*f after a few laps so i always am messing with air. 205/40ZR-17 SUMITOMO HTR Z II 17x8 Axis OG Europa SDC

I got some $50 Sumitomos on Tirerack for my current beater because I couldn't be bothered to spend more money on this car. Nevertheless, they have not failed me in the wet, snow or sleet.

I had the HTR+ a few years back...wouldn't recommend it for someone who is looking for a reliable track tire or a super performance tire...but I was quite surprised how well it did for everyday driving and the occasional spirited lapse in judgement...LOL...price was very nice too

they are actually very poor tires. the sidewall is super soft an the compound is far from ideal. i ran these in maybe two autox's an they were just plain sad.