The Weight of Wheels

[MTS]

I have attached a document with various wheel weights from the various wheel manufacturers.

 

[e46monk3y]

Awesome post!

Thanks!

 

[abmi0000]

Shyte - 20's are heavy :bangdesk:

 

[Rooi_Willie]

That's some cool info! :ty:

Wonder how the weight of replica csl's compare to oem csl's?

 

[Dippies]

:bravo:

 

[abmi0000]

That's some cool info! :ty:

Wonder how the weight of replica csl's compare to oem csl's?

I don't think that the guys who make replicas even care about making the wheel lightweight, but it would be interesting to see the difference.

 

[Dippies]

+1

 

[Philip Foglar]

Yep, unsprung weight (as little as possible) is important for overall handling. Then try and achieve this with heavy RFT's! :nonono:

 

[abmi0000]

Yep, unsprung weight (as little as possible) is important for overall handling. Then try and achieve this with heavy RFT's! :nonono:

Very true!

 

[ASH]

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?

 

[DROP IT - ZN]

Very informative

 

[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?

Well yes, this is the tricky part, especially when you throw RFT's into the mix! And those 19" E92 Sport rims are known to crack easily! :nonono:

 

[ASH]

Also interesting to note is that the E46 CSL rims (OEM) are heavier than the stock 19s, I thought the whole concept of CSL was coupe, sport, light so that the cars weight would be reduced as much as possible in all areas, looks like the rims where overlooked. Maybe the engineers used heavy wheels on the CSL for better weight distribution, but its a bit confusing, in relation to the whole CSL concept???

 

[moranor@axis]

current wheel weight 5.57kg but i see there is alot of room for improvement :rollsmile:

 

[zabbo]

Great info :thumbs:

 

[ASH]

Yes, Philip, if one looks at this rim design, you notice that the rim's design is pretty much flat, its face doesnt have any concavity. I wonder if wheel concavity has something to do with wheel strength as I think a wheel with some concavity will be able to deal with a bump in the road better, than one with no concavity, and may be able to distribute energy from an impact better thoughtout the rim structure. With the E92 19s the face of the rim is at one end and the rim is fairly wide across, so the stress at one end of the rim may not be evenly distributed when going over a bump.

I could be totally wrong though, can anyone advise?

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?

Well yes, this is the tricky part, especially when you throw RFT's into the mix! And those 19" E92 Sport rims are known to crack easily! :nonono:

 

[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.

 

[kabal]

Also interesting to note is that the E46 CSL rims (OEM) are heavier than the stock 19s, I thought the whole concept of CSL was coupe, sport, light so that the cars weight would be reduced as much as possible in all areas, looks like the rims where overlooked. Maybe the engineers used heavy wheels on the CSL for better weight distribution, but its a bit confusing, in relation to the whole CSL concept???

OEM 18 are made by Ronal
Gravity Cast
18x8 et 47 24.7 lbs
18x9 et 26 26.9 lbs

OEM 19 are made by Fuchs
Forged
19x8 et 47 27.8 lbs
19x9.5 et 27 29.2 lbs

OEM CSL/ZCP are made by BBS Germany (not Japan)
Slow Form Cast
19x8 et 47 24.0 lbs
19x9.5 et 27 25.5 lbs

 

[Mr Occo]

:bravo::bravo:

 

[Wes]

:ty: