BMW performance brakes on f30 340i, min wheel size?

[BlueEyedBoy]

Hi,

I'm going to get some new wheel and some winter tyres for traveling to the Alps. I've got the performance brakes at the moment and 19" wheels, was hoping to get 18" for the winter tyres, but looking at the clearance of the calipers worried it will rub.

Does any one know if 18" will clear the calipers?

Cheers

[d_a_n1979]

BlueEyedBoy said:

Hi,

I'm going to get some new wheel and some winter tyres for traveling to the Alps. I've got the performance brakes at the moment and 19" wheels, was hoping to get 18" for the winter tyres, but looking at the clearance of the calipers worried it will rub.

Does any one know if 18" will clear the calipers?

Cheers

Have you had a look on MrWinterWheels?

https://www.mrwinterwheels.co.uk/bmw-winter-wheels...

[Pica-Pica]

I have gone down from 19” to 18” on my 335d with msport brakes. For mine, that is the minimum recommended wheel diameter, and better for comfort and speed humps. It looks as if you could go lower, but I imagine there is a needed clearance to avoid stones and grit scraping.

If you look at BMW accessory site, and look at winter wheels, you can put your VIN in and it will show the wheels and sizes. It may be that other styles of wheels at BMW’s recommended minimum may not give adequate clearance, because of the shape that the inside of the spokes make. For that reason, and for preference of the style, I went for BMW type 398 18”

Edited by Pica-Pica on Monday 19th October 14:17

[Pica-Pica]

d_a_n1979 said:

Have you had a look on MrWinterWheels?

https://www.mrwinterwheels.co.uk/bmw-winter-wheels...

Make sure you click down beyond the model to the ‘performance brake upgrade’ filter.

Note, the set of wheel bags seems a bargain price at £34 a set.

[BlueEyedBoy]

Pica-Pica said:

Make sure you click down beyond the model to the ‘performance brake upgrade’ filter.

Note, the set of wheel bags seems a bargain price at £34 a set.

Thanks guys, it's suggesting 18" will fit with performance brakes, must be tight fit but as long as it doesn't rub I'm good 🙂

[d_a_n1979]

BlueEyedBoy said:

Thanks guys, it's suggesting 18" will fit with performance brakes, must be tight fit but as long as it doesn't rub I'm good ??

A few mm clearance is all thats needed

[Pica-Pica]

d_a_n1979 said:

BlueEyedBoy said:

Thanks guys, it's suggesting 18" will fit with performance brakes, must be tight fit but as long as it doesn't rub I'm good ??

A few mm clearance is all thats needed

No, it is not a tight fit, I have 18” over msport discs and calipers, what bit of that was not clear? Also clearances need to be more than a few mm If they are to avoid grit/stones being trapped between caliper and wheel.

[drdino]

18" BMW wheels fit fine over the M-Sport brakes (370mm fronts).

[b14]

Yep 18inch 400m style wheels fit over the big brakes - I've got a set for my winter tyres on my 340i.

[d_a_n1979]

Pica-Pica said:

No, it is not a tight fit, I have 18” over msport discs and calipers, what bit of that was not clear? Also clearances need to be more than a few mm If they are to avoid grit/stones being trapped between caliper and wheel.

Feck get off your high horse; it was merely a comment for the OP

And no; clearance DON'T need to be more than just a few mm; I've run many a track car that's only just had a few mm clearance between the caliper tip & inner barrel of the alloy with ZERO issues and more so when I've stupidly gone into the gravel etc... As long as it clears, it's fine. Yes, more than a few mm is great, but it isn't a MUST

But thanks for teaching me how to suck eggs

[Pica-Pica]

d_a_n1979 said:

Pica-Pica said:

No, it is not a tight fit, I have 18” over msport discs and calipers, what bit of that was not clear? Also clearances need to be more than a few mm If they are to avoid grit/stones being trapped between caliper and wheel.

Feck get off your high horse; it was merely a comment for the OP

And no; clearance DON'T need to be more than just a few mm; I've run many a track car that's only just had a few mm clearance between the caliper tip & inner barrel of the alloy with ZERO issues and more so when I've stupidly gone into the gravel etc... As long as it clears, it's fine. Yes, more than a few mm is great, but it isn't a MUST

But thanks for teaching me how to suck eggs

It’s not about track cars. It’s about designed clearances for everyday customers. Your eggs are obviously a different flavour to what we design to.