tire size question
Thread Starter
Heel & Toe
Joined: Dec 2006
Posts: 21
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tire size question
I spoke with the tire rack about rims and tires for my 2003 convertible, O.Z. super leggera 18x9.5 and 19x11 with BF KDW-2 tires. The recomended tire size by the tire rack is 265-35-18 in front and 275-35-19 in the rear. I was hoping to do 295-35-19 in the rear witch they said would be OK but because of the "tire relationship" the fronts would have to be 245-45-18.
Does this make sense to anyone, if so please explain. Thank you.
Does this make sense to anyone, if so please explain. Thank you.
Race Director
Joined: Jan 2002
Posts: 19,557
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From: I love you & miss you Linda
2017 C7 of the Year Finalist
St. Jude Contributor
I spoke with the tire rack about rims and tires for my 2003 convertible, O.Z. super leggera 18x9.5 and 19x11 with BF KDW-2 tires. The recomended tire size by the tire rack is 265-35-18 in front and 275-35-19 in the rear. I was hoping to do 295-35-19 in the rear witch they said would be OK but because of the "tire relationship" the fronts would have to be 245-45-18.
Does this make sense to anyone, if so please explain. Thank you.
Does this make sense to anyone, if so please explain. Thank you.
OD 265/35x18 = 25.3
OD 305/30x19 = 26.2
This would give you the approx 1" stagger front to rear that C5's come with from Bowling Green.
Race Director
Joined: Jan 2002
Posts: 19,557
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From: I love you & miss you Linda
2017 C7 of the Year Finalist
St. Jude Contributor
The 305 will easily fit,, but after looking at BFG's website, I see they do not make the KDW tire in that size... 
The diamater of the tire is the height of the tire from top to bottom.
C5's come with a 1" stagger, meaning the rear tire stands approx 1" taller than the fronts.
The diamater of the tire is the height of the tire from top to bottom.
C5's come with a 1" stagger, meaning the rear tire stands approx 1" taller than the fronts.
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Race Director
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From: San Diego CA
One thing you might want to consider is wheel weight and its effect on ride quality. Heavier (than stock) wheels represent more unsprung weight - not good when it comes to ride and even acceleration.
Getting rid of runflats eliminates about 6 lbs from each tire and 24 lbs of unsprung weight, making the ride noticably better. Throwing on huge wheels and tires will do just the opposite, so be aware....
Getting rid of runflats eliminates about 6 lbs from each tire and 24 lbs of unsprung weight, making the ride noticably better. Throwing on huge wheels and tires will do just the opposite, so be aware....
Burning Brakes
Joined: Jul 2006
Posts: 968
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From: Regina Sask
I spoke with the tire rack about rims and tires for my 2003 convertible, O.Z. super leggera 18x9.5 and 19x11 with BF KDW-2 tires. The recomended tire size by the tire rack is 265-35-18 in front and 275-35-19 in the rear. I was hoping to do 295-35-19 in the rear witch they said would be OK but because of the "tire relationship" the fronts would have to be 245-45-18.
Does this make sense to anyone, if so please explain. Thank you.
Does this make sense to anyone, if so please explain. Thank you.
Russ Kemp
