what size tires on 18x8 wheels
09-03-2009, 08:23 PM
#1
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what size tires on 18x8 wheels Whats the widest and tallest tires I can I put on 18x8 wheels on my 94 trans am? Or what size would you suggest?
09-03-2009, 09:04 PM
#2
I really hope this gets used so the same posts stop getting asked.
POPULAR & USEFUL LINKS
Link: Make your own Decisions.
Link: Understanding Wheel Offsets and Frequently Asked Questions
Link: Detailed List of Common Wheel Weights
Link: Wheel sizing graphic chart - A picture is worth 1000 words!!!
Link: Drag Wheel and Tire FAQ's
Link: Wheel and Tire Picture Gallery
Link: What wheel looks good on your COLOR car?
TIRE CALCULATOR(s) !
http://www.discounttiredirect.com/di...foTireMath.jsp
http://www.discountpartcenter.com/tirecalc.html
http://www.rims-n-tires.com/rt_specs.jsp
Camaro & Firebird Fitments
--------------------------------------------------------------------------
Bolt Pattern
5 x 4.75" or 5 x 120.65 mm
Lug Nut Size
19 mm socket (6 sided socket preffered over 12 sided sockets) 3/4" will work in a pinch.
12 mm X 1.5 pitch commonly marketed as M12X1.5 - Recommend a "Bulge Cone Seat" style lug nut.
Wheel Fitments
The numbers in the columns are as follows:
WIDTH ..... OFFSET ......... WIDTH OF TIRE
Front and Rear
7.0" ..... +35 to +40 mm .... 215, 225, 235
7.5" ..... +35 to +45 mm .... 215, 225, 235
8.0" ..... +38 to +55 mm .... 225, 235, 245
8.5" ..... +38 to +45 mm .... 235, 245, 255
9.0" ..... +38 to +56 mm .... 255, 265, 275
9.5" ..... +38 to +56 mm .... 255, 265, 275, 285
10.0" ... +38 to +48 mm .... 265, 275, 285
REAR Only
10.0" ... +38 to +54 mm .... 275, 285, 295
10.5" ... +38 to +50 mm .... 285, 295, 305, 315
11.0" ... +45 to +56 mm .... 305, 315, 335
NOTE: 315 series tires DO NOT fit 9" or 9.5" wheels. It will not be discussed any thread posting will be edited, locked or deleted.
PLEASE READ @ 315's
Z06 Corvette Replicas:
17"x9.5" +50 to +56 mm no problems. 275/40R17.
18"x9.5" +50 to +56 mm 275/35R18 or 285/35R18.
18"x10.5" +50 to +53 mm. Higher than 53 mm will require the BFH mod. 285/35R18s thru 315/30R18. Over 295 may require rolling the fenderlip and will need the BFH. +58 mm is the typical available offset for the Z06 replica, which will require a little BFH and/or a small spacer.
Y2k Corvette Replicas:
17"x8.5" +56 mm
17"x9.5" +50 to +56 mm
18"x9.5" +50 to +56 mm
17"x11" Wheels
ZR-1 Style for Camaro +50 mm (Known as Grand Sport offset)
ZR-1 Style fo Firebird +36 or +50 mm The wheel well on the "bird" is a little wider.
American Racing TT-2's +45 mm
With 17"x11"s there is always a possibility of needing the BFH and/or fender rolling mods with 315s. If lowered, an Adjustable Panhard Bar becomes a virtual necessity. Some have used the +38 offsets with an 11" wheel but it does stick outside the fender and is definitly not recommended on lowered vehicles. +50 and +56 are the two most common. +50 is the better fit (for the ZR-1 replica).
For road race only applications a 17"x11" at all four corners can be made to fit.
Pontiac GTO Fitments
--------------------------------------------------------------------------
Bolt Pattern
5 x 120 mm
Lug Nut Size
19 mm socket
12 mm X 1.5 pitch commonly marketed as M12X1.5 - Recommend a "Bulge Cone Seat" style lug nut.
Wheel Fitment
+48mm is the stock offset. (Same as most wheels for BMW's and many Audi and other euro cars.)
WIDTH ......... OFFSET ........... WIDTH OF TIRE
Front and Rear
7.0" ............ +26 to +65 ........ 215, 225, 235
7.5" ............ +33 to +61 ........ 215, 225, 235, 245
8.0" ............ +39 to +55 ........ 225, 235, 245
8.5" ............ +45 to +48 ........ 235, 245, 255
REAR Only!
8.0" ............ +36 to +65 ........ 245, 255
8.5" ............ +42 to +65 ......... 245, 255
9.0" ............ +48 to +65 ........ 255, 265, 275
9.5" ............ +55 to +64 ........ 265, 275 (body mods are required)
OFFSETS GREATER THAN SHOWN ABOVE WILL RUB ON REAR
FENDER LIP. (25MM FENDER LIP)
--------------------------------------------------------------------------
If you did something a bit out of the ordinary...please add to this post.
For wheel size help, this chart will tell you roughly what fits with the least modification. It is not exactly flawless since some wheels and tires are not exact fit like one would expect.
* BFH = Big F'king Hammer (FYI)
A very special THANKS to our members for contibuting to the table!
POPULAR & USEFUL LINKS
Link: Make your own Decisions.
Link: Understanding Wheel Offsets and Frequently Asked Questions
Link: Detailed List of Common Wheel Weights
Link: Wheel sizing graphic chart - A picture is worth 1000 words!!!
Link: Drag Wheel and Tire FAQ's
Link: Wheel and Tire Picture Gallery
Link: What wheel looks good on your COLOR car?
TIRE CALCULATOR(s) !
http://www.discounttiredirect.com/di...foTireMath.jsp
http://www.discountpartcenter.com/tirecalc.html
http://www.rims-n-tires.com/rt_specs.jsp
Camaro & Firebird Fitments
--------------------------------------------------------------------------
Bolt Pattern
5 x 4.75" or 5 x 120.65 mm
Lug Nut Size
19 mm socket (6 sided socket preffered over 12 sided sockets) 3/4" will work in a pinch.
12 mm X 1.5 pitch commonly marketed as M12X1.5 - Recommend a "Bulge Cone Seat" style lug nut.
Wheel Fitments
The numbers in the columns are as follows:
WIDTH ..... OFFSET ......... WIDTH OF TIRE
Front and Rear
7.0" ..... +35 to +40 mm .... 215, 225, 235
7.5" ..... +35 to +45 mm .... 215, 225, 235
8.0" ..... +38 to +55 mm .... 225, 235, 245
8.5" ..... +38 to +45 mm .... 235, 245, 255
9.0" ..... +38 to +56 mm .... 255, 265, 275
9.5" ..... +38 to +56 mm .... 255, 265, 275, 285
10.0" ... +38 to +48 mm .... 265, 275, 285
REAR Only
10.0" ... +38 to +54 mm .... 275, 285, 295
10.5" ... +38 to +50 mm .... 285, 295, 305, 315
11.0" ... +45 to +56 mm .... 305, 315, 335
NOTE: 315 series tires DO NOT fit 9" or 9.5" wheels. It will not be discussed any thread posting will be edited, locked or deleted.
PLEASE READ @ 315's
Z06 Corvette Replicas:
17"x9.5" +50 to +56 mm no problems. 275/40R17.
18"x9.5" +50 to +56 mm 275/35R18 or 285/35R18.
18"x10.5" +50 to +53 mm. Higher than 53 mm will require the BFH mod. 285/35R18s thru 315/30R18. Over 295 may require rolling the fenderlip and will need the BFH. +58 mm is the typical available offset for the Z06 replica, which will require a little BFH and/or a small spacer.
Y2k Corvette Replicas:
17"x8.5" +56 mm
17"x9.5" +50 to +56 mm
18"x9.5" +50 to +56 mm
17"x11" Wheels
ZR-1 Style for Camaro +50 mm (Known as Grand Sport offset)
ZR-1 Style fo Firebird +36 or +50 mm The wheel well on the "bird" is a little wider.
American Racing TT-2's +45 mm
With 17"x11"s there is always a possibility of needing the BFH and/or fender rolling mods with 315s. If lowered, an Adjustable Panhard Bar becomes a virtual necessity. Some have used the +38 offsets with an 11" wheel but it does stick outside the fender and is definitly not recommended on lowered vehicles. +50 and +56 are the two most common. +50 is the better fit (for the ZR-1 replica).
For road race only applications a 17"x11" at all four corners can be made to fit.
Pontiac GTO Fitments
--------------------------------------------------------------------------
Bolt Pattern
5 x 120 mm
Lug Nut Size
19 mm socket
12 mm X 1.5 pitch commonly marketed as M12X1.5 - Recommend a "Bulge Cone Seat" style lug nut.
Wheel Fitment
+48mm is the stock offset. (Same as most wheels for BMW's and many Audi and other euro cars.)
WIDTH ......... OFFSET ........... WIDTH OF TIRE
Front and Rear
7.0" ............ +26 to +65 ........ 215, 225, 235
7.5" ............ +33 to +61 ........ 215, 225, 235, 245
8.0" ............ +39 to +55 ........ 225, 235, 245
8.5" ............ +45 to +48 ........ 235, 245, 255
REAR Only!
8.0" ............ +36 to +65 ........ 245, 255
8.5" ............ +42 to +65 ......... 245, 255
9.0" ............ +48 to +65 ........ 255, 265, 275
9.5" ............ +55 to +64 ........ 265, 275 (body mods are required)
OFFSETS GREATER THAN SHOWN ABOVE WILL RUB ON REAR
FENDER LIP. (25MM FENDER LIP)
--------------------------------------------------------------------------
If you did something a bit out of the ordinary...please add to this post.
For wheel size help, this chart will tell you roughly what fits with the least modification. It is not exactly flawless since some wheels and tires are not exact fit like one would expect.
* BFH = Big F'king Hammer (FYI)
A very special THANKS to our members for contibuting to the table!
