[cjp2k]

Looking at some winters for my wifes 4 series convertible, its got standard brakes so no need for large wheels

Looking online loads of 16 inch with 205 60 16 but according to a local dealer you need 225 55 16 for a 4 series

There are far less 225 wheel sets online and those that are there are much more expensive

So can i safely fit 205s to a 4 series?

[Edinburra]

Check out the label on the drivers door jamb, that'll tell you what sizes you can fit that the manufacturer recommends.

[teaston]

According to mrwinterwheels 17” is the smallest for 4 series:

https://www.mrwinterwheels.co.uk/bmw...eels/4-series/

[doncarlyon]

The label on my 420d says 225/45/18 for winter

[teaston]

Originally Posted by doncarlyon

The label on my 420d says 225/45/18 for winter

Ignore the winter, just whats the smallest rim size?

[Pobsey]

I have a set of BMW 16” steel wheels from a F30 sat in the shed, 16x7 so good for 205 wide tyres. Let me know if your interested.

[Alscoob]

Originally Posted by cjp2k

Looking at some winters for my wifes 4 series convertible, its got standard brakes so no need for large wheels

Looking online loads of 16 inch with 205 60 16 but according to a local dealer you need 225 55 16 for a 4 series

There are far less 225 wheel sets online and those that are there are much more expensive

So can i safely fit 205s to a 4 series?

Well a 205x60x16 is the exact same overall diameter as a 225x55x16 only difference is the aspect ration of the wall, meaning that the 205 has a taller wall.

Potential down side to this is the overall handling, may seem a bit squirmy, hence the lower wall and slightly wider tread (225) being recommended.

I'm assuming that you have either 225x45x18 or 225x40x19's on the front at the moment.

If you went to 17" you would be looking at 205x55x17 or 225x50x17 to keep as close as possible to the original wheel overall diameter.

Do some research here.....https://tiresize.com/calculator/

Also a 205x60x16 on a square set up will look like a pushbike wheel in those arches !!

[pmgreenwood]

My understanding is that 4cyl F30 etc are ok with 16 wheels as long as not fitted with Msport brakes. I agree with comment on looking at the plate on drivers door pillar.

[Harryg]

Originally Posted by pmgreenwood

My understanding is that 4cyl F30 etc are ok with 16 wheels as long as not fitted with Msport brakes. I agree with comment on looking at the plate on drivers door pillar.

Normally people upgrade their wheels which upgrades the spec of the car insurance wise may be ok providing they are made aware degrading the wheel size will not bode well with insurance and in the unfortunate event of an accident the assessors take wheel size tyre depth and pressures so I would err on the side of caution.

[pmgreenwood]

Originally Posted by Harryg

Normally people upgrade their wheels which upgrades the spec of the car insurance wise may be ok providing they are made aware degrading the wheel size will not bode well with insurance and in the unfortunate event of an accident the assessors take wheel size tyre depth and pressures so I would err on the side of caution.

205/16 is an approved BMW set on door panel and therefore few insurers will have an issue with such. Mine don't. In addition for winter use as SAAB used to regularly illustrate narrower is better than wider.

[kitster]

I've got a set of 205/60/16 (steels) They fit my F31 320d (standard brakes).

Reminds me I need to ditch them asap, as they won't fit the new car.