Tire Fit Question - TCCoA Forums
 3Likes
  • 1 Post By Woodman
  • 1 Post By MikeB
  • 1 Post By 96beaterbird
 
LinkBack Thread Tools
post #1 of 10 (permalink) Old 01-04-2016, 12:26 PM Thread Starter
Seasoned Veteran Poster
 
Join Date: Sep 2002
Location: Novi, MI
Posts: 938
Tire Fit Question

Has anyone successfully installed a 295/45R18 tire on the back of their MN12? I'm looking at the new Nitto NT555 G2 tire in that size, to go along with 18" x 10" wheels. I know a 285/40R17 works on my car, and assume a 285/40R18 will also fit, but the 295/45 is much taller than either of those choices.

MikeB
1997 Thunderbird Sport
5.0L-2V PI S/C
540 RWHP / 492 RWTQ
11.28 @ 123 MPH
MikeB is offline  
Sponsored Links
Advertisement
 
post #2 of 10 (permalink) Old 01-04-2016, 08:23 PM
PostWhore
 
driller's Avatar
 
Join Date: Nov 2005
Location: Morgantown, WV
Posts: 1,266
Send a message via AIM to driller
I use this site for tire/wheel comparisons...

Custom rims, wheel tire packages for your ride - RIMSnTIRES.com
driller is offline  
post #3 of 10 (permalink) Old 01-05-2016, 12:07 PM
PostWhore
 
Woodman's Avatar
 
Join Date: Jan 2010
Location: Duluth, MN
Age: 45
Posts: 1,886
Garage
Quote:
Originally Posted by MikeB View Post
Has anyone successfully installed a 295/45R18 tire on the back of their MN12? I'm looking at the new Nitto NT555 G2 tire in that size, to go along with 18" x 10" wheels. I know a 285/40R17 works on my car, and assume a 285/40R18 will also fit, but the 295/45 is much taller than either of those choices.
That is a HUGE tire, 1.9" taller overall than stock height. It's going to throw your speedometer way off.

To measure fitment, the offset of your wheels is an important factor. I have 18x9" wheels on all four corners, running 255/40/18 and have no clearance issues (unless I turn all the way to lock then I may rub my inner fenderwall) but it is VERY close to the spindle with my 35mm offset wheels.

Assuming you're using wheels from Custom WHeel Shop with a 36mm offset, your tires will be 3/4" closer to the suspension, your wheels will be 1.5" closer, and you'll take up an additional 1.2" toward the top of the wheelwell. Your tire will also stick out .9" father.

Grab a tape measure and check before buying.
Woodman is offline  
Sponsored Links
Advertisement
 
post #4 of 10 (permalink) Old 01-05-2016, 03:23 PM Thread Starter
Seasoned Veteran Poster
 
Join Date: Sep 2002
Location: Novi, MI
Posts: 938
The speedo error can be handled with a drive gear change, of course. I'm thinking outside the box a bit here, trying to come up with a combination that will fill the wheel wells while maintaining ground clearance after I drop the car further. My high flow cats scrape sometimes when driving on undulating pavement, and I don't want to make that situation worse. But the stance is bad, especially in the front, so i feel like further lowering is necessary.

MikeB
1997 Thunderbird Sport
5.0L-2V PI S/C
540 RWHP / 492 RWTQ
11.28 @ 123 MPH
MikeB is offline  
post #5 of 10 (permalink) Old 01-05-2016, 08:41 PM
PostWhore
 
Woodman's Avatar
 
Join Date: Jan 2010
Location: Duluth, MN
Age: 45
Posts: 1,886
Garage
Quote:
Originally Posted by MikeB View Post
The speedo error can be handled with a drive gear change, of course. I'm thinking outside the box a bit here, trying to come up with a combination that will fill the wheel wells while maintaining ground clearance after I drop the car further. My high flow cats scrape sometimes when driving on undulating pavement, and I don't want to make that situation worse. But the stance is bad, especially in the front, so i feel like further lowering is necessary.
Here's my car on 255/40R18 all around with 1.5" Eibach lowering springs. I think they fill the wheel wells quite well, and they are a 26" tall tire like the 17's you were running.



In my opinion, instead of going with huge tires to get more ground clearance while achieving the stance you want, just spend a few bucks to get your exhaust pipes tucked upward a little more. That way you don't have to worry about fender clearance issues and ruining a nice set of tires.
ogbird95 likes this.
Woodman is offline  
post #6 of 10 (permalink) Old 01-06-2016, 07:47 AM Thread Starter
Seasoned Veteran Poster
 
Join Date: Sep 2002
Location: Novi, MI
Posts: 938
The stance of your car looks pretty good. Like mine, the front looks a little higher than the rear, but overall an improvement from what I've got. I'll probably end up with ~27" tall tires, since the 28" tall ones are either light truck tires or only used on Pro Street cars.
Woodman likes this.

MikeB
1997 Thunderbird Sport
5.0L-2V PI S/C
540 RWHP / 492 RWTQ
11.28 @ 123 MPH
MikeB is offline  
post #7 of 10 (permalink) Old 01-06-2016, 09:27 AM
4th Gear Poster
 
96beaterbird's Avatar
 
Join Date: Dec 2011
Location: Kingston, Ontario
Posts: 241
Quote:
Originally Posted by MikeB View Post
The stance of your car looks pretty good. Like mine, the front looks a little higher than the rear, but overall an improvement from what I've got. I'll probably end up with ~27" tall tires, since the 28" tall ones are either light truck tires or only used on Pro Street cars.
The 285/40/18's you mentioned previously are a 27," but it's such an oddball size that the selection is very limited.

Other than the rear of the GT500's did any other car use this size?

285/35/18 will be 25.9" tall and there's lots of selection.
Woodman likes this.
96beaterbird is offline  
post #8 of 10 (permalink) Old 01-06-2016, 08:23 PM
PostWhore
 
Woodman's Avatar
 
Join Date: Jan 2010
Location: Duluth, MN
Age: 45
Posts: 1,886
Garage
Quote:
Originally Posted by MikeB View Post
The stance of your car looks pretty good. Like mine, the front looks a little higher than the rear, but overall an improvement from what I've got. I'll probably end up with ~27" tall tires, since the 28" tall ones are either light truck tires or only used on Pro Street cars.
My driveway isn't level, when I'm on flat ground it's even.
Woodman is offline  
post #9 of 10 (permalink) Old 01-07-2016, 09:05 AM Thread Starter
Seasoned Veteran Poster
 
Join Date: Sep 2002
Location: Novi, MI
Posts: 938
The 285/40-18 size is available from Nitto, Continental, Bridgestone, Goodyear, Pirelli and Michelin. Granted, other than Nitto these are pretty expensive tires, but at least there are choices.

BTW, 27" isn't that much taller than the OE tires. The base LX got 215/70-15's which were 26.85" diameter, while the Sport option cars got 225/60-16's which were 26.63" diameter.

Woodman: did you have to use a spacer with the 255/40-18's in front? I've had to run a 4mm spacer with 255/45-17s on a 9" wide wheel. That is something I'd like to get away from with the next set of wheels and tires.

MikeB
1997 Thunderbird Sport
5.0L-2V PI S/C
540 RWHP / 492 RWTQ
11.28 @ 123 MPH

Last edited by MikeB; 01-07-2016 at 09:30 AM.
MikeB is offline  
post #10 of 10 (permalink) Old 01-07-2016, 04:19 PM
PostWhore
 
Woodman's Avatar
 
Join Date: Jan 2010
Location: Duluth, MN
Age: 45
Posts: 1,886
Garage
Quote:
Originally Posted by MikeB View Post
The 285/40-18 size is available from Nitto, Continental, Bridgestone, Goodyear, Pirelli and Michelin. Granted, other than Nitto these are pretty expensive tires, but at least there are choices.

BTW, 27" isn't that much taller than the OE tires. The base LX got 215/70-15's which were 26.85" diameter, while the Sport option cars got 225/60-16's which were 26.63" diameter.

Woodman: did you have to use a spacer with the 255/40-18's in front? I've had to run a 4mm spacer with 255/45-17s on a 9" wide wheel. That is something I'd like to get away from with the next set of wheels and tires.
Mike, no spacers. I did a lot of research before i bought the wheels, and got the 35mm offset because I knew it would clear. Most of the 18x9's for our cars (from Custom Wheel Shop) are 36mm offset. I took measurements, plugged them into this site Rim & Tire Size Calculator. Custom Offsets - Wheel-Size.com and it showed I should clear. I mounted them up and sure enough, no issues. A 38mm offset would be a little too close I think.

I did buy a set of hubcentric rings for the wheels too.
Woodman is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the TCCoA Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome