revlis240 Posted July 16, 2011 Share Posted July 16, 2011 Hey Ive been doing a LOT of searching and it seems many people are using 16x7 wheels with 225/50/16 tires and around 0 offset without issues. I currently have some old Enkie 16x7 0 offset wheels with 205 tires all the way around. I have about 1/2" clearance to the bottom of the spring perch on the rears. I bought a set of 16x7 (and I believe 0 offset) from ANOTHER 240Z GUY who was using them on his supposedly stock 240z. Upon installation, the rear tires are hitting the bottom spring perch. I will either need to get a spacer or use a 205 tire. The power that my Chevy 350 is putting down, I would really prefer a 225 tire, but I would love to know how you guys got past this issue? I searched for an hour and no one else seems to have this problem? Im Confused! Abe Quote Link to comment Share on other sites More sharing options...
30 ounce Posted July 16, 2011 Share Posted July 16, 2011 I'm running 16x8 and have to run a 1/8 spacer in front and none in back to clear the spring perches with 225/50x16's. Don't remember the offset but my issue was with the front spring perches. When I put the Toyota brake calipers on the front and Mustang GT500 calipers on the back I had to run 1/4" spacer in front and 1/8" in back to clear the calipers. Quote Link to comment Share on other sites More sharing options...
Matt K Posted July 18, 2011 Share Posted July 18, 2011 Weird...I'm running a 15x8" zero offset with a 225/50-15 in the rear (no mid or rolling) without any clearance issues. It's on a '78 though...I remember hearing earlier Z's may need some clearancing. Quote Link to comment Share on other sites More sharing options...
BLOZ UP Posted July 18, 2011 Share Posted July 18, 2011 Weird, I just got back from LA and the first post I read originates from there... I have 225/55/16 on 16x8+0, no rubbing except on the fronts at full lock, and the rear fenders occasionally. BFG g-force T/A Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted July 18, 2011 Share Posted July 18, 2011 16x8 0 offset with 225/50 on a stock 240Z with 1"lowering springs. No rubbing except for when I hit a heavy dip in the road which rubs the outer rear tires lightly. Quote Link to comment Share on other sites More sharing options...
wigenOut-S30 Posted July 18, 2011 Share Posted July 18, 2011 I ran 16x8 wheels with 245 45 16s for a few years. Granted that was with -13 offset though and I did have to roll the fenders. Never came close to the spring perches though. Can you take some pics of the clearance issues? and maybe some of the inside of the wheel. Some wheels have the offset stamped on the inside. Quote Link to comment Share on other sites More sharing options...
Leon Posted July 18, 2011 Share Posted July 18, 2011 16X7, zero offset, 225/50 on a dropped 260Z and no rubbing issues that I've noticed. Sounds like your wheels might have some positive offset, setting them back into the wheel-wells. Gabe has a point, check your wheel offset. If it's not stamped on the wheel then you can measure it yourself. Quote Link to comment Share on other sites More sharing options...
revlis240 Posted July 18, 2011 Author Share Posted July 18, 2011 (edited) Hey guys, Thanks so much for the replies. The only thing I can see stamped on the back of the wheels says "16x7 2PC" and lot of random numbers. I measured the backspacing to the rear edge of the rim and I get 4.75" Here are some pictures of my 15x7 0 offset (I think?) Enkies that are on there right now. In my first post I said I had 16x7 right now, I dont, I actually have 15" wheels with 205 tires. The 15" wheels with 205 tires are barely 1" away from the strut. adding another 20mm to the tire + bulge = hitting strut. I confirmed the new wheels are off of a 72Z with NO spacers being used on it. How odd. I dont even know if these springs/struts are stock or not. I dont see any markings on them what so ever. Take a look at the pics and see what you think. Again, this is with my 15" enkies and 205 tires. But its pretty apparant how close that strut is! Edited July 18, 2011 by revlis240 Quote Link to comment Share on other sites More sharing options...
Leon Posted July 18, 2011 Share Posted July 18, 2011 Spring/struts are stock. Going from 205mm to 225mm section width tires increases total width by 20mm, meaning 10mm on each side. That's about 0.4 inches. If you use your pictured wheels with 225mm wide tires, my guess is you'll be fine. Backspacing of 4.75" on a 7" wide rim equates to an offset in the neighborhood of +20mm, too much for a Z. You need spacers or a different wheel. Quote Link to comment Share on other sites More sharing options...
revlis240 Posted July 18, 2011 Author Share Posted July 18, 2011 ^ good point. I suppose the guy may have used spacers and forgotten about them. He said the wheels were on his Z 10 years ago. I hate my current wheels, thats why I got these new ones. I took the guys word that they fit the Z just fine, but were a good deal nonetheless. Maybe Ill put a 215 tire and a small spacer and see what happens. Whats the widest spacer I can use without breaking my studs every week? Quote Link to comment Share on other sites More sharing options...
revlis240 Posted July 19, 2011 Author Share Posted July 19, 2011 (edited) Hey guys, this is the car the wheels came off of. The owner insists suspension was stock, tire size was 225/50/16 and no spacers were used. UUUUGH!! Edited July 19, 2011 by revlis240 Quote Link to comment Share on other sites More sharing options...
Leon Posted July 19, 2011 Share Posted July 19, 2011 He had to have been using spacers. Those wheels definitely have a substantial positive offset. Quote Link to comment Share on other sites More sharing options...
revlis240 Posted July 19, 2011 Author Share Posted July 19, 2011 Thanks Leon. Im curious, how can you tell? The face of the wheel looks just like the enkies i have now with 0 offset. I thought offset was determined by how far back the part that mounts to hub intrudes to the inside of the rim, and obviously you cant see that in the picture! Sorry for the noob question, i dont really know much about offsets and such. Abe Quote Link to comment Share on other sites More sharing options...
Leon Posted July 19, 2011 Share Posted July 19, 2011 Yes, that's what offset is: the relation of the wheel mounting surface to the centerline of the rim, and from the pictures it looks like offset is positive considering the rims are 7" wide. You've already measured backspacing and concluded that offset is excessively positive for S30 fitment. There's no black magic about it, if they hit the struts when installed then they need spacers. Otherwise, you need to ditch them and get a wheel that fits. Quote Link to comment Share on other sites More sharing options...
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