Bridgestone Potenza RE050A Run Flat

Run flats fitted on the front - very uneven wear with very high wear on outside edge, terrible tramlining and uncomfortable. OK its an MSport but its on 17 rims so the profiles are not silly. Tyres actually went on for a few thousant males more as the middle tread had plenty left. Changed to Continental sport contact 2 RF and found more comfortable nad less tramlining. Still look like they are wearing on the outside edge. The rear tyres (255x40 x170 are still going ok after 32k miles with 3mm tread but wet weather (and snow) grip is almost zero so will have to go.

Just replaced all four tyres after 4000 miles of wear. 225/R19 RE050A 88Y on the front and 255/30R19 RE050A 91Y on the rear. All tyres worn through to the braiding on the inside edge, rest of tread approximately 7mm. Scary as you cannot see the wear without getting under the car. The tracking was all awry with the king pin angle being over 13 degrees+ on the front tyres. 26 readings were taken on the front of which 6 were classified as dangerous This is either a tyre design problem or the the BMW suspension is unable to absorb the extra stresses caused by the stiffness of the side wall in a RF tyre hence the changes in the tracking. The UK roads are in a terrible state with pot holes, sunken drain covers or badly repaired subsidence. This must contribute to the problem and therefore either Bridgestone or BMW or both are not producing a product suitable for UK road conditions. Today I was informed that a colleagues car, a BMW 1 series has suffered the same problem and all four tyres are having to be replaced. This suggests that this is a common problem with BMW and Bridgestone on which despite the dangerous implications both manufacturers are keeping quiet. I will follow this through with BMW and report further

I bought the car only a few months old from BMW with the standard run flat Bridgestone Potenza tyres. The rear tyres are now bald on the inner edges after covering only a total of 13,600 miles and need replacing. I am astonished at only a short life and whilst I can put with the very hard ride and having to keep an extreme awareness of 'potholes' and sunken manhole covers, the suspension is a worse ride than my Morgan Sports car with sliding pillar suspension of 1909 era. They are the worst tyres I have ever experienced in 45 years of driving and will get rid of as soon as possible!

49k miles on 2 sets 225/40/18 front & 255/35/18 rear. Wear OK but grip in wet is horrendous even 20mph slow around roundabouts induces a front slide and big understeer. I've had 4 wheel alignment checked twice in case potholes knocked it out but all correct and front tyres still wear heavily on outside. If I didn't do 50% motorway miles these tyres would NOT last 1/2 distance. Ride is very hard and you certainly know when you hit a road hole. VERY disappointing from Bridgestone :(
My previous BMW 330ci had Dunlop SP9000 Sport and they were brilliant.

These tyres are the worst I have ever driven on a car and ive driven alot of cars the sooner you get them off the z4 the better. They are leathal and its a wonder they fit them. They started being rubbish at 5000 miles and as the car was new,I am stuck with them but get them off asap.

Dry grip is astounding - cornering limits are reached by your nerves before the tyres. Tyre screech became evident at high g when tread reached 4mm.

Wet grip is excellent, however traction very noticeably and badly affected once tread reached 4mm. Tyres easily overpowered by the car in the wet.

I got 25,000 miles on tyres when replaced @ 4mm due to above issues. Excellent wear - I am very spirited driver indeed and often seek out country roads on weekends ;-)

Tramlining, harsh ride, understeer in some situations and replacement cost led me to swap to Goodyear Assymetric.

Which I now regret enormously...

Car been in for a service 28000 on 1 set of tyres not bad at all. However had it not been for a groove worn on the inside edge of each tyre 25mm wide x 8mm deep i would think i would have got another 15.k There is 6mm of tread left across the full width of the tyre but the inside edge of each is down to the steel wires. Car only 15 month old never bumped a kerb. Either car set up wrong or tyres have a major fault. £250 each + Vat Ouch!!!

rock hard tyres with good dry grip. mediocre wet grip.
damn uncomfortable, expensive and tyre wear is horrid. Utter rubbish, dont believe the hype