The Weight of Wheels

[Philip Foglar]

on the otherhand are lightweight rims more susceptable to pothole damage and cracking? Eg. the 19" Sport rims on the E92, with the ultra low profile RFT tyres, these are know to crack at the rear, for no reason?

Rims that are lightweight aren't the issue. Crap RFTs are the real problem. The side wall on a 30/35 profile tyre is already tight for obvious reasons and the reinforced sidewall found on RFTS create even more kak for the wheel since the wall barely has any flex left in it, thus causing much more trauma against the structure of the wheel.

Throw that rubbish off the car and the wheel will be perfect, like any other OEM wheel.

And since I want the benefits of RFT's, this is why I am happy to stick with the 17" size! For me plenty of grip and ride is still decently comfortable, so a good balance. :thumbs:

 

[abmi0000]

on the otherhand are lightweight rims more susceptable to pothole damage and cracking? Eg. the 19" Sport rims on the E92, with the ultra low profile RFT tyres, these are know to crack at the rear, for no reason?

Rims that are lightweight aren't the issue. Crap RFTs are the real problem. The side wall on a 30/35 profile tyre is already tight for obvious reasons and the reinforced sidewall found on RFTS create even more kak for the wheel since the wall barely has any flex left in it, thus causing much more trauma against the structure of the wheel.

Throw that rubbish off the car and the wheel will be perfect, like any other OEM wheel.

And since I want the benefits of RFT's, this is why I am happy to stick with the 17" size! For me plenty of grip and ride is still decently comfortable, so a good balance. :thumbs:

Agreed - that's the only way to do it if you want the benefits of RFT

 

[The K-Man]

A real nice to have raise:

 

[kabal]

E46 CSL weights in that spreadsheet is wrong.

the CSL rear is exactly the same as ZHP/Competition, coming in at 25.5 lbs/11.6kg

the front CSL is slightly heavier than the ZHP front, due to 8.5" vs 8" respectively, so should be around 24.5lbs / 11kgs

 

[ASH]

Thanks Kabal, that settles my suspicions, it baffled me that the BMW engineers would put heavier rims on a lightweight M3, sounded really strange!

E46 CSL weights in that spreadsheet is wrong.

the CSL rear is exactly the same as ZHP/Competition, coming in at 25.5 lbs/11.6kg

the front CSL is slightly heavier than the ZHP front, due to 8.5" vs 8" respectively, so should be around 24.5lbs / 11kgs