[Z06] Tires and wheels
07-22-2014, 06:08 PM
#1
Heel & Toe
Thread Starter
Tires and wheels
I have a 2003 Z06, running 19 and 20 Continentals. The fronts are 275/30/ZR19 while the rears are 305/30/ZR20. The wheels are Avus forged three piece wheels. My biggest gripe is how noisy these tires are on some road surfaces in addition to being a very hard riding tire. I'm considering increasing the aspect ratio on the rear set to 30 or maybe even 35. What problems, if any will I encounter?
07-22-2014, 06:34 PM
#2
Melting Slicks
wait, you're running
and you want to
surely there is a typo?
Anyhow, increasing aspect ratio will give you a bigger sidewall, which may ride better. Probably will not change the noise level. that is a function of rubber compound and tread design mostly.
Having a taller sidewall on the 20" might bring you close to rubbing if you're lowered. Not sure, haven't run a 20 personally. Worth looking at though.
The fronts are 275/30/ZR19 while the rears are 305/30/ZR20
increasing the aspect ratio on the rear set to 30 or maybe even 35
Anyhow, increasing aspect ratio will give you a bigger sidewall, which may ride better. Probably will not change the noise level. that is a function of rubber compound and tread design mostly.
Having a taller sidewall on the 20" might bring you close to rubbing if you're lowered. Not sure, haven't run a 20 personally. Worth looking at though.
07-22-2014, 07:45 PM
#3
Heel & Toe
Thread Starter
wait, you're running
and you want to
surely there is a typo?
Anyhow, increasing aspect ratio will give you a bigger sidewall, which may ride better. Probably will not change the noise level. that is a function of rubber compound and tread design mostly.
Having a taller sidewall on the 20" might bring you close to rubbing if you're lowered. Not sure, haven't run a 20 personally. Worth looking at though.
and you want to
surely there is a typo?
Anyhow, increasing aspect ratio will give you a bigger sidewall, which may ride better. Probably will not change the noise level. that is a function of rubber compound and tread design mostly.
Having a taller sidewall on the 20" might bring you close to rubbing if you're lowered. Not sure, haven't run a 20 personally. Worth looking at though.
07-22-2014, 09:07 PM
#4
Race Director
if you're on the DW that's already one of the softest smoothest tires made. the michelin pss has a stiffer sidewall and is more responsive but also louder and that before mentioned sidewall
you need to be on 18/17 if you want some degree of comfort
it's absolutely not possible with your wheel sizes. there is physically so little sidewall the tire makers have to make them stiff to support the car
you need to be on 18/17 if you want some degree of comfort
it's absolutely not possible with your wheel sizes. there is physically so little sidewall the tire makers have to make them stiff to support the car
07-22-2014, 11:10 PM
#5
Heel & Toe
Thread Starter
if you're on the DW that's already one of the softest smoothest tires made. the michelin pss has a stiffer sidewall and is more responsive but also louder and that before mentioned sidewall
you need to be on 18/17 if you want some degree of comfort
it's absolutely not possible with your wheel sizes. there is physically so little sidewall the tire makers have to make them stiff to support the car
you need to be on 18/17 if you want some degree of comfort
it's absolutely not possible with your wheel sizes. there is physically so little sidewall the tire makers have to make them stiff to support the car
07-23-2014, 01:10 AM
#6
Melting Slicks
Ultimately though, as long as the spread from front to rear isn't dramatically different I'd expect you'll be just fine.
07-23-2014, 02:01 PM
#8
Race Director
from a 25 to a 30? The difference will be negligible as you're keeping the same wheel diameter. 25 to 35? still not huge. It wouldn't hurt to compare the diameter from the stock 18 inch to a 20/35. might put your speedo off a bit.
Ultimately though, as long as the spread from front to rear isn't dramatically different I'd expect you'll be just fine.
Ultimately though, as long as the spread from front to rear isn't dramatically different I'd expect you'll be just fine.
295 30 20 is 27"
295 35 20 is 28.1
no big deal at all, just a couple inches,
07-24-2014, 10:03 PM
#10
Heel & Toe
Thread Starter
30 sidewall is pretty close. I looked into the Michelin's and as long as the reviews aren't being written by the Michelin rep sound like a quality tire. A little pricey, but so is a corvette. I appreciate your response. I posted a pic, but I'm not real savvy on this forum yet. Maybe you are and can find it.
07-25-2014, 07:50 PM
#12
Heel & Toe
Thread Starter
I just went to that link you provided and found it to be extremely useful. Thanks for that. Looks like the 30 aspect ratio will work for what I'm trying to acheive.
07-26-2014, 02:51 AM
#14
Pro
Member Since: Oct 2010
Location: Vancouver British Columbia
Posts: 557
Likes: 0
Received 12 Likes
on
11 Posts
from a 25 to a 30? The difference will be negligible as you're keeping the same wheel diameter. 25 to 35? still not huge. It wouldn't hurt to compare the diameter from the stock 18 inch to a 20/35. might put your speedo off a bit.
Ultimately though, as long as the spread from front to rear isn't dramatically different I'd expect you'll be just fine.
Ultimately though, as long as the spread from front to rear isn't dramatically different I'd expect you'll be just fine.
Depending upon the front size/aspect of tires it may negatively affect traction control and surely the speedo, correct me if I'm wrong
but there should be a difference of 1/4" front to rear, the front being obviously smaller in diameter.
305/25/20" = overall diameter of 26"s
305/30/20" = overall diameter of 27.2 "s
305/35/20" = overall diameter of 28.4 "s
Last edited by tak06; 07-26-2014 at 02:59 AM.
07-26-2014, 11:00 AM
#15
Heel & Toe
Thread Starter
It's actually quite noticeable, over 1" difference from 25 to 30 aspect ratio & over 2" difference from 25 to 35 aspect ratio.
Depending upon the front size/aspect of tires it may negatively affect traction control and surely the speedo, correct me if I'm wrong
but there should be a difference of 1/4" front to rear, the front being obviously smaller in diameter.
305/25/20" = overall diameter of 26"s
305/30/20" = overall diameter of 27.2 "s
305/35/20" = overall diameter of 28.4 "s
Depending upon the front size/aspect of tires it may negatively affect traction control and surely the speedo, correct me if I'm wrong
but there should be a difference of 1/4" front to rear, the front being obviously smaller in diameter.
305/25/20" = overall diameter of 26"s
305/30/20" = overall diameter of 27.2 "s
305/35/20" = overall diameter of 28.4 "s
Last edited by Wheels54; 07-26-2014 at 11:03 AM. Reason: include more info
