Mazda Rotary Club

General => General Technical => Wheels & Tyres, Suspension & Brakes => Topic started by: shifty on November 05, 2012, 09:19:34 PM

Title: Tire sizing
Post by: shifty on November 05, 2012, 09:19:34 PM
Been looking at getting some new tyres as my Toyo T1R,s are starting to wear on the back and as the T1R is discontinued ive been checking out the newer R1R track and road tyre which seems to get decent press the only problem is size im running some work CR Kai,s 9.5x18 wrapped in 255x40x18 but the only sizes close to that are 245x40 255x35 or 265x35 there site say the 245 or the 265 are rated for 9.5 rims but what would be best I run quite a low ride (not as low as some) but low enough to need negative camber on the back so whats best or am I better of sticking with the size I have and find another tyre.
Title: Tire sizing
Post by: shifty on November 08, 2012, 08:30:03 PM
Anyone ? :wiggle
Title: Tire sizing
Post by: lee mills on November 08, 2012, 08:37:35 PM
I run with 245 on a 10" rim on the front of mine if that helps
Title: Tire sizing
Post by: jetpilot on November 10, 2012, 11:39:40 AM
255 or 265 will be fine on a 9.5 rim, you should be running a 35 profile to keep the rolling radius as near to stock as standard anyway, not 40!
Title: Tire sizing
Post by: shifty on November 10, 2012, 11:53:11 AM
The issues I have is how low and wide I am to the archs I was told by someone that the 245-40 would be best but ive been told in the past a lower 35 on the 255 would allow more clearance .
(http://i615.photobucket.com/albums/tt236/dacons/car%20pics/DSCF0658.jpg)
(http://i615.photobucket.com/albums/tt236/dacons/car%20pics/DSCF0655.jpg)
Title: Tire sizing
Post by: trev0006 on November 30, 2012, 05:52:48 PM
I am also running 245 on a 10" rim.





Quote from: shifty;840420Been looking at getting some new tyres as my Toyo T1R,s are starting to wear on the back and as the T1R is discontinued ive been checking out the newer R1R track and road tire (http://www.discountpartcenter.com/) which seems to get decent press the only problem is size im running some work CR Kai,s 9.5x18 wrapped in 255x40x18 but the only sizes close to that are 245x40 255x35 or 265x35 there site say the 245 or the 265 are rated for 9.5 rims (http://www.discountpartcenter.com/wheels/allwheels.htm) but what would be best I run quite a low ride (http://www.dpccars.com/) (not as low as some) but low enough to need negative camber on the back so whats best or am I better of sticking with the size I have and find another tyre.
Title: Tire sizing
Post by: shifty on November 30, 2012, 06:11:53 PM
yeah think il give them a go when its time
Title: Tire sizing
Post by: kummbho on December 01, 2012, 06:38:00 AM
255 or 265 will be excellent on a 9.5 rim, you should be operating a 35 information to keep the moving distance as near to inventory as conventional anyway, not 40!