Cup 1 wheel/tire choices - need help
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Joined: Jun 2015
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From: Ontario, Canada
Cup 1 wheel/tire choices - need help
Hey everyone. I have a 1989 964 C4, lowered on Bilstein HDs - currently running OEM RS America Cup 1 wheels (widths - 7 front, 8 rear). They have Continental ContiSport Contact 2 tires...I believe 205/50 17 front and 255/40 17 rear. I also have a set of Borbet Cup 1 replicas (visually identical to the OEM ones), but widths are 7.5 front and 9 rear. They are without tires.
My question to you is - which set of wheels is a better choice in terms of pure enjoyment (forget about OEM vs replica value, etc)? Will the extra width be a noticeable improvement? I know nothing about how wheel size affects performance for the most part. The weight of the OEM vs rep is negligible...almost the same.
I am due to replace the rear tires on my OEM wheels, so this would be an opportunity to either A) replace the rears and keep running OEMs or B) buy a new set of 4 tires for the reps and run the wider wheels. Thanks for any guidance!
My question to you is - which set of wheels is a better choice in terms of pure enjoyment (forget about OEM vs replica value, etc)? Will the extra width be a noticeable improvement? I know nothing about how wheel size affects performance for the most part. The weight of the OEM vs rep is negligible...almost the same.
I am due to replace the rear tires on my OEM wheels, so this would be an opportunity to either A) replace the rears and keep running OEMs or B) buy a new set of 4 tires for the reps and run the wider wheels. Thanks for any guidance!
Burning Brakes
Joined: Jan 2010
Posts: 931
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From: Jackson, NH
I ended up going with General g Maxx for my cup 1 replicas. Per Damon at Tire Rack who is pretty knowledgeable on our cars, this was his recommendation. I was looking for a cheap set of tires. Summitomo, etc, and he said the Generals are much better tire and ended up being cheaper.
Thread Starter
Banned
Joined: Jun 2015
Posts: 416
Likes: 157
From: Ontario, Canada
I ended up going with General g Maxx for my cup 1 replicas. Per Damon at Tire Rack who is pretty knowledgeable on our cars, this was his recommendation. I was looking for a cheap set of tires. Summitomo, etc, and he said the Generals are much better tire and ended up being cheaper.
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Hey everyone. I have a 1989 964 C4, lowered on Bilstein HDs - currently running OEM RS America Cup 1 wheels (widths - 7 front, 8 rear). They have Continental ContiSport Contact 2 tires...I believe 205/50 17 front and 255/40 17 rear. I also have a set of Borbet Cup 1 replicas (visually identical to the OEM ones), but widths are 7.5 front and 9 rear. They are without tires.
My question to you is - which set of wheels is a better choice in terms of pure enjoyment (forget about OEM vs replica value, etc)? Will the extra width be a noticeable improvement? I know nothing about how wheel size affects performance for the most part. The weight of the OEM vs rep is negligible...almost the same.
I am due to replace the rear tires on my OEM wheels, so this would be an opportunity to either A) replace the rears and keep running OEMs or B) buy a new set of 4 tires for the reps and run the wider wheels. Thanks for any guidance!
My question to you is - which set of wheels is a better choice in terms of pure enjoyment (forget about OEM vs replica value, etc)? Will the extra width be a noticeable improvement? I know nothing about how wheel size affects performance for the most part. The weight of the OEM vs rep is negligible...almost the same.
I am due to replace the rear tires on my OEM wheels, so this would be an opportunity to either A) replace the rears and keep running OEMs or B) buy a new set of 4 tires for the reps and run the wider wheels. Thanks for any guidance!
some points to consider
1) the 8" rear is under sized for a 255/40 tire, you lose a lot of performance potential from that
2) the heavier aftermarket wheels cause a noticeable of a performance loss, ~10lb-ft loss, there is a also a bit of loss of compliance that is hard to quantify
Here is an alternate tire set on the 7/8 factory wheels,
here there is only a .5lb-ft loss due to the heavier front tires. This will not be noticable
the 245 tire is also w/i spec, though wider wheels 7.5/9.5 would give even better performance as long as they aren't too heavy
