Tyres showing signs of over inflation
Discussion
I check pressures regularly in line with the info on the sticker in the door jamb, but these rear tyres I had changed yesterday definitely look to have worn more in the middle.
Is 2 bar too low on a 530d for the rear? These have worn like this after 18k miles at 2.2 bar
Is 2 bar too low on a 530d for the rear? These have worn like this after 18k miles at 2.2 bar
Edited by Ifinishposts on Saturday 23 September 19:03
Edited by Ifinishposts on Saturday 23 September 19:05
Rear wheel drive cars do this on the rear. Perfectly normal. I wouldn’t go trying to compensate for it by reducing the pressures unless you have other causes to suspect that you’d be better off running a lower pressure.
In future rotate your rear tyres to the front when they get down to 4/5mm.
In future rotate your rear tyres to the front when they get down to 4/5mm.
Funk said:
A) many BMWs are 'staggered' setups so this isn't possible
Granted. However, many aren't- in which case it is. Funk said:
B) even if you could 'rotate' them, you shouldn't have tyres with deeper tread on the front, you want them on the rear.
If you started out with a matched set, and it's a rear wheel drive car, the tyres removed from the front axle will be less worn than the rear tyres- ergo...HustleRussell said:
Funk said:
A) many BMWs are 'staggered' setups so this isn't possible
Granted. However, many aren't- in which case it is. Funk said:
B) even if you could 'rotate' them, you shouldn't have tyres with deeper tread on the front, you want them on the rear.
If you started out with a matched set, and it's a rear wheel drive car, the tyres removed from the front axle will be less worn than the rear tyres- ergo...
Ifinishposts said:
I check pressures regularly in line with the info on the sticker in the door jamb, but these rear tyres I had changed yesterday definitely look to have worn more in the middle.
Is 2 bar too low on a 530d for the rear? These have worn like this after 18k miles at 2.2 bar
Unfortunately, for us to have the full story we would need to know if you have had these on & checked them from the tyres being new, otherwise any difference in wear pattern could be from before then.Is 2 bar too low on a 530d for the rear? These have worn like this after 18k miles at 2.2 bar
Personal opinion if so would be as above the pressure gauge you are using is reading low.
On top of this I would never personally recommend using bar for tyre pressure readings as many go no more accurate than 0.1 which is 1.5 psi, yet if you use a PSI gauge for checking 0.1 psi is around 0.007 bar, so the reading is much more accurate.
I’ve found that the gauges fitted to DIY compressors to inflators tend to be inaccurate. I grabbed a sealey TSTPG12 key ring guage earlier this year , not exactly small but it’s digital and does the job. It is also much more accurate than the one attached to my compressor via the airline, which was roughly 3psi out.
HustleRussell said:
Rear wheel drive cars do this on the rear. Perfectly normal. I wouldn’t go trying to compensate for it by reducing the pressures unless you have other causes to suspect that you’d be better off running a lower pressure.
As above. I've had multiple BMWs since the 1990s and they have all done this. They are especially prone if you do a lot of high speed motorway driving.Gassing Station | Suspension, Brakes & Tyres | Top of Page | What's New | My Stuff