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      10-17-2015, 02:14 PM   #1
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Biggest Tyre Size on an M6?

Im installing a 315/30/20 R888 tomorrow on my stock M6 rear wheels. Do you think i'll have any issues?

My next option will be Pirelli PZero 305/30/20 but i really want to go for the bigger size!

Anyone have 315 installed on their cars? Much appreciated!
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      10-17-2015, 03:17 PM   #2
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Quote:
Originally Posted by M6Bower
Im installing a 315/30/20 R888 tomorrow on my stock M6 rear wheels. Do you think i'll have any issues?

My next option will be Pirelli PZero 305/30/20 but i really want to go for the bigger size!

Anyone have 315 installed on their cars? Much appreciated!
I have 305 on my 343M M5 wheels which are a 10. They fit great. Your M6 has 10.5" wheel so I would think you'd be find with 315s.

Will the shop allow a test fit? Usually places like discount have a 30 day return policy.

I know a guy has fit 325 on his M6 with an aftermarket 20x12" wheel.
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      10-17-2015, 08:17 PM   #3
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Quote:
Originally Posted by M6Bower
Im installing a 315/30/20 R888 tomorrow on my stock M6 rear wheels. Do you think i'll have any issues?

My next option will be Pirelli PZero 305/30/20 but i really want to go for the bigger size!

Anyone have 315 installed on their cars? Much appreciated!
Stay on the 305/30/20 , we tried the r888 315/30/20 on my friend's M6 and got drive train malfanction + r888 are a heavy tires
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      10-18-2015, 04:16 AM   #4
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Quote:
Originally Posted by q8kamikaze View Post
Stay on the 305/30/20 , we tried the r888 315/30/20 on my friend's M6 and got drive train malfanction + r888 are a heavy tires
Wow thanks for advise. I've had a lot of problems with drive train before and don't want that again 👍🏼👍🏼
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      10-18-2015, 04:18 AM   #5
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Quote:
Originally Posted by M6Bower
Quote:
Originally Posted by q8kamikaze View Post
Stay on the 305/30/20 , we tried the r888 315/30/20 on my friend's M6 and got drive train malfanction + r888 are a heavy tires
Wow thanks for advise. I've had a lot of problems with drive train before and don't want that again 👍🏼👍🏼
Welcome bro , good luck
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      10-18-2015, 09:21 AM   #6
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Quote:
Originally Posted by 13M5F10 View Post
I have 305 on my 343M M5 wheels which are a 10. They fit great. Your M6 has 10.5" wheel so I would think you'd be find with 315s.

Will the shop allow a test fit? Usually places like discount have a 30 day return policy.

I know a guy has fit 325 on his M6 with an aftermarket 20x12" wheel.
Hey R, can you shoot me over a pic with the 305/30/20 on your 343M wheel? I think I will be going in that direction when I buy tires in a few months. Also, is the diameter pretty close or does it affect MPH any?

Thanks bro!
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      10-18-2015, 10:14 AM   #7
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Quote:
Originally Posted by Lerxst M5
Quote:
Originally Posted by 13M5F10 View Post
I have 305 on my 343M M5 wheels which are a 10. They fit great. Your M6 has 10.5" wheel so I would think you'd be find with 315s.

Will the shop allow a test fit? Usually places like discount have a 30 day return policy.

I know a guy has fit 325 on his M6 with an aftermarket 20x12" wheel.
Hey R, can you shoot me over a pic with the 305/30/20 on your 343M wheel? I think I will be going in that direction when I buy tires in a few months. Also, is the diameter pretty close or does it affect MPH any?

Thanks bro!
We both run PZero 305/30/20s
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      10-18-2015, 10:28 AM   #8
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Quote:
Originally Posted by Lerxst M5
Quote:
Originally Posted by 13M5F10 View Post
I have 305 on my 343M M5 wheels which are a 10. They fit great. Your M6 has 10.5" wheel so I would think you'd be find with 315s.

Will the shop allow a test fit? Usually places like discount have a 30 day return policy.

I know a guy has fit 325 on his M6 with an aftermarket 20x12" wheel.
Hey R, can you shoot me over a pic with the 305/30/20 on your 343M wheel? I think I will be going in that direction when I buy tires in a few months. Also, is the diameter pretty close or does it affect MPH any?

Thanks bro!
I'll grab some pictures today and post. They don't bulge like you'd think

As for tire specs, 305s are best fitted with 265 compared to 295. See chart below.
Attached Images
   
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      10-18-2015, 10:29 AM   #9
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Pictures didn't load properly.
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      10-18-2015, 10:30 AM   #10
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More angles that didn't load in my post
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      10-18-2015, 01:04 PM   #11
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Quote:
Originally Posted by q8kamikaze View Post
Stay on the 305/30/20 , we tried the r888 315/30/20 on my friend's M6 and got drive train malfanction + r888 are a heavy tires
Only 2 lb heavier than MPSS 305/30/20
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      10-18-2015, 02:37 PM   #12
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Quote:
Originally Posted by MCarsFan
Quote:
Originally Posted by Lerxst M5
Quote:
Originally Posted by 13M5F10 View Post
I have 305 on my 343M M5 wheels which are a 10. They fit great. Your M6 has 10.5" wheel so I would think you'd be find with 315s.

Will the shop allow a test fit? Usually places like discount have a 30 day return policy.

I know a guy has fit 325 on his M6 with an aftermarket 20x12" wheel.
Hey R, can you shoot me over a pic with the 305/30/20 on your 343M wheel? I think I will be going in that direction when I buy tires in a few months. Also, is the diameter pretty close or does it affect MPH any?

Thanks bro!
We both run PZero 305/30/20s
Are you running f/r spacers with this setup?
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      10-18-2015, 06:02 PM   #13
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Quote:
Originally Posted by MCarsFan View Post
We both run PZero 305/30/20s
Not sure why my MPSS 305 on M6 343M (which is 0.5" wider than M5 343M) looks more aggressive to me... I mean looks like despite the wider rim, tire stands out more... more enough to protect the rims from curb rash
Look at these pictures:
Attached Images
  
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      10-18-2015, 08:52 PM   #14
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not sure if you guys saw this but here's what the M4 guys did to get a 315 to fit.

http://f80.bimmerpost.com/forums/sho....php?t=1182475
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      10-18-2015, 11:07 PM   #15
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Quote:
Originally Posted by 13M5F10 View Post
More angles that didn't load in my post
Sold - those actually look great! Thanks brother. Give me a shout when you're here again.
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      10-18-2015, 11:09 PM   #16
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Quote:
Originally Posted by MCarsFan View Post
We both run PZero 305/30/20s
Awesome, thank you for the pics and reply!
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      10-18-2015, 11:23 PM   #17
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Quote:
Originally Posted by Lerxst M5
Quote:
Originally Posted by 13M5F10 View Post
More angles that didn't load in my post
Sold - those actually look great! Thanks brother. Give me a shout when you're here again.
I'm back. Just got in to town. Leaving Tuesday.
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      10-18-2015, 11:40 PM   #18
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Quote:
Originally Posted by lsturbointeg View Post
not sure if you guys saw this but here's what the M4 guys did to get a 315 to fit.

http://f80.bimmerpost.com/forums/sho....php?t=1182475
I'm wondering if this M4 can be driven anywhere except straight line LOL.
People think wider tire (or wider track) means more traction and grip. It's not always "true: and traction doesn't mean handling or agility at all. There is a close relation between width, length, height, weight (distribution),power and aero dynamic of a car. I bet this particular M4 is extremely under-steer and has horrible drivability. 30-40 mm over OEM tires is ridiculous...
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Last edited by M6-Coupe; 10-19-2015 at 01:25 AM.
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      10-19-2015, 08:53 AM   #19
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Quote:
Originally Posted by M6-Coupe
Quote:
Originally Posted by lsturbointeg View Post
not sure if you guys saw this but here's what the M4 guys did to get a 315 to fit.

http://f80.bimmerpost.com/forums/sho....php?t=1182475
I'm wondering if this M4 can be driven anywhere except straight line LOL.
People think wider tire (or wider track) means more traction and grip. It's not always "true: and traction doesn't mean handling or agility at all. There is a close relation between width, length, height, weight (distribution),power and aero dynamic of a car. I bet this particular M4 is extremely under-steer and has horrible drivability. 30-40 mm over OEM tires is ridiculous...
@m6beast has 325 on his with no issues. Of course on 20x12" wheels.
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      10-19-2015, 08:56 AM   #20
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Quote:
Originally Posted by M6-Coupe
Quote:
Originally Posted by MCarsFan View Post
We both run PZero 305/30/20s
Not sure why my MPSS 305 on M6 343M (which is 0.5" wider than M5 343M) looks more aggressive to me... I mean looks like despite the wider rim, tire stands out more... more enough to protect the rims from curb rash
Look at these pictures:
Michelins PSS I believe are wider sidewalls than PZero although both are 305s. We had the same issue with MPSS when I tried to run 315s on my stock ZL1 wheels. If I ran PZero or almost any other brand, it fit fine. Had a narrow side wall.
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      04-23-2017, 10:26 PM   #21
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Quote:
Originally Posted by q8kamikaze View Post
Stay on the 305/30/20 , we tried the r888 315/30/20 on my friend's M6 and got drive train malfanction + r888 are a heavy tires
im confused as to why a drivetrain malfunction would happen due to wider tires.
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      04-23-2017, 10:41 PM   #22
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Quote:
Originally Posted by RaceTruk View Post
im confused as to why a drivetrain malfunction would happen due to wider tires.
Makes zero since on a M6 wheel being 10.5 a 315 R888 would fit fine. I run them on my 10 inch wheels.
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