View Poll Results: Best Wheel Size for 928 Performance
Voters: 70. You may not vote on this poll
Vote: Best Wheel Performance Size?
10-09-2013, 06:52 PM
#31
Rennlist Member
Aluminum weighs more than rubber. The rolling diameter stays the same as you go up in rim size. You are just replacing rubber sidewall with metal wheel. This increases wheel/tire mass, which is also unsprung weight.
I think the difference is this is more "performance" oriented. 18s or 19s look the best to me on a 928. However, 17s will probably lay down the best lap timing assuming the car doesn't have rotors bigger than 330mm.
I think the difference is this is more "performance" oriented. 18s or 19s look the best to me on a 928. However, 17s will probably lay down the best lap timing assuming the car doesn't have rotors bigger than 330mm.
rim goes up in diameter, but rubber goes down in sidewall, and its about an even trade off. rims are 19lbs and tires are generally around 27lbs. so the unsprung weight generally stays the same
10-09-2013, 06:55 PM
#32
Rennlist Member
one advantage would be resistance to wheel lockup.
generally, for every 1lb on the wheel, its like 1.5lbs as if it was riding in the car.
on the tire diameter, its more like 2x. thats the net net on the straightline performance side of things
10-09-2013, 07:14 PM
#33
Archive Gatekeeper
Rennlist Member
Rennlist Member
Not all 18's are created equal, even if they're more or less the same size...
Sumitomo 295-30R18 on 18x10 ET54 10" Cup 4 rim: 56 pounds
Yokohama Advan 005 301/28R18 slick on 18x12 ET ??? Kinesis rim: 41 pounds
Yokohama Advan 005 301/28R18 slick on 18x12 ET ??? Kinesis rim: 41 pounds
10-09-2013, 07:17 PM
#34
Rennlist Member
yes, there are hugh variences in tires and even more with rims C2 replicas are near 27lbs and kinesis K18s are only 19lbs and thats for a 11" wide rim. tires same thing. 30lbs to 25lbs depending on the brand and type.
