285s vs 305s
#1
Pro
Thread Starter
285s vs 305s
So I got new 285s on my rear but I heard the stock 19s can fit 305s. So in theory a bigger tires is a better tire for grip. But would I even notice the difference?
Last edited by Adam Cifonelli; 04-16-2018 at 12:14 AM.
#2
Safety Car
The base stock rear rims are 10" and will fit 305 tires with an aspect ratio of "35". However, the 305 tire with an aspect ratio of "30" recommends a 10.5" rim because the tread width is wider and the shoulder of the tire will roll up on a narrower rim. Always check the tire manufactures rim range recommendation.
#3
Pro
Thread Starter
The base stock rear rims are 10" and will fit 305 tires with an aspect ratio of "35". However, the 305 tire with an aspect ratio of "30" recommends a 10.5" rim because the tread width is wider and the shoulder of the tire will roll up on a narrower rim. Always check the tire manufactures rim range recommendation.
#4
Safety Car
#5
Race Director
I used 9 inch front rims and 11 inch rears.
#6
Race Director
Check this out for proper rim/tire combos:http://www.tyresizecalculator.com/ch...rim-size-chart
As the chart shows a 11 inch width rim is needed for a 305 tire.
Yes the 305 tire will fit on a 10 inch rim bit it isn't recommended.
As the chart shows a 11 inch width rim is needed for a 305 tire.
Yes the 305 tire will fit on a 10 inch rim bit it isn't recommended.
Last edited by Boomer111; 04-16-2018 at 10:15 AM.
#8
Race Director
Member Since: Sep 2007
Location: Peoria/Phoenix AZ
Posts: 16,555
Received 2,061 Likes
on
1,505 Posts
C6 of Year Finalist (performance mods) 2019
Tread width = better cornering, but less straight line traction
Height = better mileage, but less acceleration (gear ratio affected)
The following users liked this post:
Jason. (04-16-2018)
#9
Pro
Thread Starter
#10
Safety Car
What tire manufacturer and size are you purchasing or purchased? Look up the rim range for that specific tire manufacturer and size and you will have your answer. Don't cross reference with other tire brands.
#11
Safety Car
My straight line tire traction improved going from 285 to 305 rear tires, same tire manufacture just wider tread width. However, a lower profile tire does not benefit straight line traction. But increasing tread width on the same profile will benefit straight line traction.
Compare the base with Z51 (285 rear tires) and the GS (325 rear tires), the GS resulted in better 0-60 times.
#13
Safety Car
Check this out for proper rim/tire combos:http://www.tyresizecalculator.com/ch...rim-size-chart
As the chart shows a 11 inch width rim is needed for a 305 tire.
Yes the 305 tire will fit on a 10 inch rim bit it isn't recommended.
As the chart shows a 11 inch width rim is needed for a 305 tire.
Yes the 305 tire will fit on a 10 inch rim bit it isn't recommended.
Last edited by irok; 04-16-2018 at 06:28 PM.