brake discs

[Rich328]

i've just been trying to change the discs on my bmw 328i convertible and the discs are not vented on my car - but my dad has the same car except its a coupe and his rears are vented??

any ideas?

[BlantonG13]

So what exactly is the problem?

[Rich328]

they don't fit, i was just wondering if the car should have vented ones or not??

[bitcore]

Vented discs cool off better. You can get standard discs but they can heat up really quickly and stay really hot.

[Mr White G]

I was reading about this yesterday.... funnily enough.

The arguement was that grooved disks offer better braking, but wear pads faster. Drilled disks are prone to cracking around the hole under hard use. Flat disks are good all rounders.

You will see more of a change in performance by changing your pads to 'fast road' pads than changing disks. The only downside is that they kick off a lot of dust.

[bitcore]

I'd still go for OEM vented unless I wanted to upgrade, in which case I'd still get vented. You'll be fine without vented unless you track your car, which isn't such a great idea in a convertable without a roll cage...

[Kevin325i]

Yes, your car is supposed to have vented rotors on the rear.