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BMW M5 F90 (2018+) General Forums Wheels | Tires | Suspension | Brakes | Chassis    Weighed the stock 20' wheel and HRE 104's last night.

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      12-20-2018, 11:23 AM   #1
onfireX5
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Weighed the stock 20' wheel and HRE 104's last night.

Stock front and back wheel :
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      12-20-2018, 11:24 AM   #2
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HRE104 forged wheels front and back :
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      12-20-2018, 11:25 AM   #3
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54.8 lbs of rotational weight difference.
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      12-21-2018, 09:53 PM   #4
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Quote:
Originally Posted by onfireX5 View Post
54.8 lbs of rotational weight difference.
Wow, that's close to 1/2 tank.
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      12-22-2018, 02:52 PM   #5
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Unsprung weight savings for the win. Wow that's a huge difference.
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      12-22-2018, 06:23 PM   #6
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Did you check acceleration times
Before and after?
You should shave some 0.X
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      12-22-2018, 07:44 PM   #7
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Quote:
Originally Posted by r33_RGSport View Post
Quote:
Originally Posted by onfireX5 View Post
54.8 lbs of rotational weight difference.
Wow, that's close to 1/2 tank.
54.8lbs it's pretty sweet, I am getting few quotes on different wheels, those are one of them
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      12-22-2018, 07:53 PM   #8
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      12-22-2018, 07:58 PM   #9
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Quote:
Originally Posted by Miko M View Post
54.8lbs it's pretty sweet, I am getting few quotes on different wheels, those are one of them
You can see a lot more of the rotor and caliper with the 104's.
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      12-23-2018, 07:55 AM   #10
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Quote:
Originally Posted by onfireX5 View Post
Quote:
Originally Posted by Miko M View Post
54.8lbs it's pretty sweet, I am getting few quotes on different wheels, those are one of them
You can see a lot more of the rotor and caliper with the 104's.
Yes, looks pretty sweet!
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      12-29-2018, 02:01 PM   #11
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Great weight saving.

May I ask you the width of the HRE's?
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      12-29-2018, 02:33 PM   #12
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Quote:
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Great weight saving.

May I ask you the width of the HRE's?
10" front and 11" back
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      12-30-2018, 11:21 AM   #13
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I like those wheels, looking really good. Black wheels fit in ans color
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      12-30-2018, 12:01 PM   #14
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What size tires did you put on those up Harare's rim widths?
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      12-30-2018, 01:53 PM   #15
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Quote:
Originally Posted by Viper7 View Post
What size tires did you put on those up Harare's rim widths?
I kept my stock tires.....until they wear out.
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      12-30-2018, 03:18 PM   #16
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How are you finding the stock tires on those wider rims?

Are they stretched or not too bad?
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      12-31-2018, 10:24 AM   #17
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Quote:
Originally Posted by Viper7 View Post
How are you finding the stock tires on those wider rims?

Are they stretched or not too bad?
My HRE’s are OEM size. 1/2” is not a significant delta for the stock tires if you go to that size.
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      01-01-2019, 12:43 PM   #18
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Do you notice much difference in the ride?Thanks
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      01-01-2019, 01:41 PM   #19
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Quote:
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Do you notice much difference in the ride?Thanks
Exactly like stock.
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      01-02-2019, 12:27 PM   #20
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Damn we have a bunch of fatties on all 4 corners. At 55 lbs of unsprung weight, isnt that like removing 220 lbs from the cabin (X4)??
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      01-02-2019, 02:47 PM   #21
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Quote:
Originally Posted by Vic55 View Post
Damn we have a bunch of fatties on all 4 corners. At 55 lbs of unsprung weight, isnt that like removing 220 lbs from the cabin (X4)??
It's very significant since it is unsprung and rotational weight.
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      10-13-2022, 01:06 PM   #22
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Quote:
Originally Posted by koko f90 View Post
Did you check acceleration times
Before and after? You should shave some 0.X
Quote:
Originally Posted by Vic55 View Post
Damn we have a bunch of fatties on all 4 corners. At 55 lbs of unsprung weight, isnt that like removing 220 lbs from the cabin (X4)??
Quote:
Originally Posted by onfireX5 View Post
It's very significant since it is unsprung and rotational weight.
Bumping an old thread, but...

onfireX5 - did you see a noticeable improvement in performance with that large amount of unsprung weight savings (via numbers or even just gut feeling)?
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