lightweight rear rotors

Mid_Night_F20 · 07-17-2018, 06:51 AM

anyone running lightweight rear brake rotors in size 345x24mm ?

I'm having a hard time finding options out there, only found the ECSTuning ones.

I believe OEM are 8.8kg each, something under 8kg would be awesome !

Mid_Night_F20 · 07-19-2018, 06:02 AM

bump

FaRKle! · 07-19-2018, 10:45 AM

Haven't seen anything lighter than the 2-piece M-Sport/Perf rotors for the rear.

Mid_Night_F20 · 07-21-2018, 04:10 AM

Quote:

Originally Posted by FaRKle!

Haven't seen anything lighter than the 2-piece M-Sport/Perf rotors for the rear.

do you have a part number?

Polo08816 · 07-21-2018, 04:42 PM

Quote:

Originally Posted by Mid_Night_F20

do you have a part number?

Lighter = less heat capacity.

Billfitz · 07-21-2018, 06:26 PM

The weight reduction is in the hub. If the hub is aluminum it dissipates heat faster than cast iron. If the hub is steel it dissipates heat at about the same rate as cast iron.

Quote:

I believe OEM are 8.8kg each, something under 8kg would be awesome !

Since the weight reduction is in the hub it doesn't make much difference. In a racing situation where a tenth of a second can matter they're worth it, but otherwise not so much.

Mid_Night_F20 · 07-23-2018, 08:00 AM

Quote:

Originally Posted by Polo08816

Lighter = less heat capacity.

not an issue as i dont track my bmw

less hub/wheel weight = more responsive and quicker car !

Mid_Night_F20 · 07-23-2018, 08:18 AM

so far i found the following which is the same as OEM and both have aluminium hats:

ATE 24.0130-0233.2 (10.1kg each)
ATE 24.0124-0250.2 (7.7kg each)

I guess other ones with aluminium hats + drilled would be a bit lighter.....anyone got part numbers?

07-17-2018, 06:51 AM	#1
Mid_Night_F20 Private 23 Rep 89 Posts Drives: 125iM N20 Join Date: Dec 2016 Location: Melbourne iTrader: (0)	lightweight rear rotors - what options are there? anyone running lightweight rear brake rotors in size 345x24mm ? I'm having a hard time finding options out there, only found the ECSTuning ones. I believe OEM are 8.8kg each, something under 8kg would be awesome ! __________________ N20, EWG, Full M package, 19" x 8.5/9.5, JB4, Catless DP, Custom 3" exhaust, Upgrade intercooler with metal piping, drop in K&N, Snow Performance Stage 2 kit
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07-19-2018, 06:02 AM	#2
Mid_Night_F20 Private 23 Rep 89 Posts Drives: 125iM N20 Join Date: Dec 2016 Location: Melbourne iTrader: (0)	bump __________________ N20, EWG, Full M package, 19" x 8.5/9.5, JB4, Catless DP, Custom 3" exhaust, Upgrade intercooler with metal piping, drop in K&N, Snow Performance Stage 2 kit
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07-19-2018, 10:45 AM	#3
FaRKle! Brigadier General 4016 Rep 3,539 Posts Drives: 328d Wagon, M2 Comp, i4 eD35 Join Date: Sep 2016 Location: Bay Area, CA iTrader: (4) Garage List 2023 BMW i4 eDrive 35 [0.00] 2017 BMW 328dx Wagon [0.00] 2021 BMW M2 Competi ... [0.00]	Haven't seen anything lighter than the 2-piece M-Sport/Perf rotors for the rear.
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07-23-2018, 08:18 AM	#8
Mid_Night_F20 Private 23 Rep 89 Posts Drives: 125iM N20 Join Date: Dec 2016 Location: Melbourne iTrader: (0)	so far i found the following which is the same as OEM and both have aluminium hats: ATE 24.0130-0233.2 (10.1kg each) ATE 24.0124-0250.2 (7.7kg each) I guess other ones with aluminium hats + drilled would be a bit lighter.....anyone got part numbers? __________________ N20, EWG, Full M package, 19" x 8.5/9.5, JB4, Catless DP, Custom 3" exhaust, Upgrade intercooler with metal piping, drop in K&N, Snow Performance Stage 2 kit
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