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240Z, 260Z, 280Z Brakes, Wheels, Suspension and Chassis Discussions related to performance suspension, wheels, brakes and chassis.

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Old 10-05-2003, 03:00 PM   #1
pig4bill
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widest tire?

What's the widest tire I can put on a 78 2+2? It has the snowflake wheels. What are those, 6 inches wide? It came with 205/65-15's. Can I go to 60's or 55's?
 
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Old 10-05-2003, 06:33 PM   #2
Brandar77
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you are refering to the aspect ratio of the tire, which is the height of the tire, not the width. The "205" is the width. You could probably go with 215's or maybe 225's
 
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Old 10-05-2003, 07:02 PM   #3
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I was actually asking two questions. First, about the maximum width. Secondly, whether low profile tires would cause any problems. I could have worded it better.
 
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Old 10-05-2003, 08:16 PM   #4
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A lower aspect will make your speedo read wrong, but I think that's about it. Might affect your fuel economy a little since your engine will be running a little faster, but it should make it a little quicker off the line. I bought my Z with aftermarket wheels on it already, so I'm not sure how wide a tire you can put on the stock rims. I'm sure somebody on here will help ya out.
Good luck!
 
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Old 10-11-2003, 06:10 PM   #5
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HI....You can put 225 14 60s on the back and 215 14 60s on the front on stock rims( or mags like from the 280zx) you can also get the 15 inch from the 28zx turbo. How ever if you have just the regular steel rim a 195 14 60 wiil be the max.
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Old 10-13-2003, 12:41 PM   #6
Phantom
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With a +10mm offset (moves center of tire toward center of car) you can run a 225 width front and rear - maybe even a 235 in the rear. I am currently running 225/50-16's on all four corners. With coil-overs and some work on the rear fender well lip you can get to 235's in the front and 255's in the rear. If you stick with the stock '0' offset you really shouldn't go wider than 215's. If you lower the aspect ration you'll screw up the speedometer/odometer unless you change wheel diameter at the same time.
IE: 195/70-14 = 205/60-15 = 215/50-16 = 225/40-17 when it comes to diameter/circumference. The lower the aspect ratio the better your cornering characteristics, the harder your ride, and worse for drag racing. The higher the aspect ration the worse your handling, the softer your ride, and the better for drag racing.

Last edited by Phantom; 10-13-2003 at 12:45 PM.
 
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Old 10-13-2003, 12:41 PM
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