[bmwmike01]

Has anyone thought of buying tires with a +5 sidewall increase on the 22in rims

I wanted to buy a 40 and a 35 a/s tires instead of the 35 / 30 that comes standard.

I did this for my m550i and it was perfect for 3 years. Increased comfort, less tire issues. Has anyone tried this for the 22in x5 rims?

[iconoclast]

Just a thought but what if you purchased a set of X7 22" wheels and tires? They have a square set up and more tire.

[bmwmike01]

Originally Posted by iconoclast

Just a thought but what if you purchased a set of X7 22" wheels and tires? They have a square set up and more tire.

I want to just replace the tires not the whole rims. It comes with summer and I live in nyc. Wanted to go +5 with all seasons.

[jad03060]

If you can live with the difference in speedometer and odometer readings, they MIGHT fit. It's hard to tell if a severe bump that put the tire into the bump stop if there'd be enough clearance, especially if you were in the course of a tight turn.

If I did my math right, that's about a 14% error you'd be introducing to the speedometer and odometer...might be good for warranty since it won't 'see' as many miles, but risky for your license and insurance as the readout won't be accurate and read quite low from your actual speed.

[bmwmike01]

Originally Posted by jad03060

If you can live with the difference in speedometer and odometer readings, they MIGHT fit. It's hard to tell if a severe bump that put the tire into the bump stop if there'd be enough clearance, especially if you were in the course of a tight turn.

If I did my math right, that's about a 14% error you'd be introducing to the speedometer and odometer...might be good for warranty since it won't 'see' as many miles, but risky for your license and insurance as the readout won't be accurate and read quite low from your actual speed.

I highly doubt that has anything to do with miles and speed.

[JimVR4]

Originally Posted by bmwmike01

I highly doubt that has anything to do with miles and speed.

absolutely changes these. You would be increasing the rolling diameter and it will take fewer revolutions per mile.

[Bucksn6]

Originally Posted by bmwmike01

I highly doubt that has anything to do with miles and speed.

It absolutely does. Increasing or decreasing the overall diameter of the tire increases or decreases the speed readout and miles read. If you have a smaller tire diameter than what was equipped from factory, your car will read more miles than you've actually driven and your speedometer will show you are driving faster than you are. If your tire is larger, it will read less miles and a slower speed than you are actually traveling.

[Auricom]

As others have stated there will be changes to your calc speed:

Going +5 in front increases overall diameter by 96mm to 114mm = +14%

When speedometer reads 60 km/h actual speed will be 62.2 km/h

Revs per mile is 4% less, from 682 down to 658.

All what ever size changes you make, you want to ensure there is 1% or less differentiation between front and rear cause well xDrive.

https://www.wheel-size.com/calc/?whe...cl=50mm&sr=0mm





You're not going to have any +5 options for 22" all seasons.

There are no 275/40R22 + 315/35R22 all seasons listed on TireRack and you'd need to either stick with OEM 275/35R22 + 315/30R22 or go 285/40R22 + 325/35R22.

275/40R22 + 315/35R22 = No A/S
https://www.tirerack.com/tires/TireS...earDiameter=22

Sticking to your +5, 285/40R22 + 325/35R22 = 1 A/S
https://www.tirerack.com/tires/TireS...earDiameter=22




OEM 275/35R22 + 315/30R22 = 1 A/S
https://www.tirerack.com/tires/TireS...earDiameter=22

[jad03060]

If you run the numbers on all of the OEM tire/wheel combinations, you'll find that their OD and thus rolling diameters are all very close to each other, usually within 1%. IF there's more than 2%, you start to have issues with the ABS and the X-drive system as it then thinks the tires are not all rotating at the same rate (and they won't be!), and then tries to compensate...messes things up.

If you want a smoother, less impactful ride, next time, don't upsize the wheel package! There's a reason why the base vehicle comes with 19" wheels. Two-axle air suspension helps, if it's available, as there's less friction so it can respond to small variations easier than a steel spring can.