Jacko Posted July 28, 2006 Author Share Posted July 28, 2006 A very handy site for working out differences in wheels is http://www.1010tires.com/WheelOffsetCalculator.asp Thanks Rob, that's pretty handy Also just realised that the optional Rays are +30 front and +33 rear, not +30 & +30. So according to that, going from a 8.5 rear (+33) to 10.5 (+30) will give:- Inner Clearance: 22mm LESS (the inside of the wheel to the strut housing) Outer Position: EXTEND an extra 28mm (position of the outside edge of the wheel) And front from 8" (+30) to 9.5"(+30):- Inner Clearance: 19mm LESS (the inside of the wheel to the strut housing) Outer Position: EXTEND an extra 19mm (position of the outside edge of the wheel) How does that sound to all? Any thoughts...... guess could try to measure inside clearance but will be tricky getting in! Quote Link to comment Share on other sites More sharing options...
Rob_Quads Posted July 28, 2006 Share Posted July 28, 2006 yup sounds about right - what you also have to remember is thats the difference for the actual rim. You may also have larger tyres on there i.e. 245/45/18 -> 275/35/19 - these are 30mm wider so will stick out 15mm more than standard So you have to work out a combination of how much wider the tyres are and how you are moving the offset around i.e. going from 8" ET30 -> 9.5" ET22 with a 245 -> 275 would mean The rim would sit a further 27mm further out The tyre is 15mm wider each side + 8mm wider offset -> 22mm sider So - the rim would be sitting 27mm further out than your standard wheel but the tyre would only be sitting 22m wider than the standard tyres. offsets are all sort of fun Quote Link to comment Share on other sites More sharing options...
Jacko Posted July 28, 2006 Author Share Posted July 28, 2006 yup sounds about right - what you also have to remember is thats the difference for the actual rim. You may also have larger tyres on there i.e. 245/45/18 -> 275/35/19 - these are 30mm wider so will stick out 15mm more than standard So you have to work out a combination of how much wider the tyres are and how you are moving the offset around i.e. going from 8" ET30 -> 9.5" ET22 with a 245 -> 275 would mean The rim would sit a further 27mm further out The tyre is 15mm wider each side + 8mm wider offset -> 22mm sider So - the rim would be sitting 27mm further out than your standard wheel but the tyre would only be sitting 22m wider than the standard tyres. offsets are all sort of fun Ok so I was planning to put 275/35/19 on the new rear 10.5 ET30, going from a 245/45/18. I was told that this tyre would still be ok on a 10.5" as opposed to a 9.5" So what would that work out in relation to tyre width vs rim width?? Now I am getting confused! Quote Link to comment Share on other sites More sharing options...
Rob_Quads Posted July 28, 2006 Share Posted July 28, 2006 I know the rays are ET +33 on the rear with 8.5x18..so... Rims will be 28mm further out Tyres will be 275 from 245 are 30mm wider = 15 each side + 3mm further out due to offset change = 18mm further out So they will not really stick out that much more Quote Link to comment Share on other sites More sharing options...
Jacko Posted July 28, 2006 Author Share Posted July 28, 2006 I know the rays are ET +33 on the rear but what is the rim size - 8.5x18? Yes, the "standard" Rays are rear: +33 on 8.5"x18, front +30 on 8"x18 Quote Link to comment Share on other sites More sharing options...
Rob_Quads Posted July 28, 2006 Share Posted July 28, 2006 See my edit above Quote Link to comment Share on other sites More sharing options...
Jacko Posted July 28, 2006 Author Share Posted July 28, 2006 So basically, to close all this off (as sure people are getting really bored of my wheel questions ) If I go 9.5"x19" ET30 front on 245/35/19 and 10.5"x19" ET30 on 275/35/19 rear, then I'm going to be fine, they won't stick out too much and no rubbing etc..... Cheers Rob and Kev.....as long as no one says anything different! Quote Link to comment Share on other sites More sharing options...
Nick_MSM Posted July 28, 2006 Share Posted July 28, 2006 Just to clarify mine..9'' front and 10.5'' rear. The offsets are +26 front and +22 rear. No scrubbing lowered on Tein, fills arches nicely too. 245/35/19 and 275/30/19 toyo rubber. Quote Link to comment Share on other sites More sharing options...
Sarnie Posted July 28, 2006 Share Posted July 28, 2006 Just read 3 pages of this and WTF Excuse my ignorance but what does +30 actually mean/represent? And before somebody says it, I have read the previous posts, but I need someone to explain it in idiots terms Quote Link to comment Share on other sites More sharing options...
Blacky Posted July 28, 2006 Share Posted July 28, 2006 Try this Sarnie http://www.procarcare.com/icarumba/resourcecenter/encyclopedia/icar_resourcecenter_encyclopedia_wheels.asp Quote Link to comment Share on other sites More sharing options...
Sarnie Posted July 28, 2006 Share Posted July 28, 2006 Cheers for that mate, appreciate it The only problem is, I'm a lazy ****er and just want to be told in 10 words or less if possible other wise my gold fish concentration span expires after 10 secs Quote Link to comment Share on other sites More sharing options...
Blacky Posted July 28, 2006 Share Posted July 28, 2006 Offset is the distance from the mounting face of the wheel spider to the rim centerline Quote Link to comment Share on other sites More sharing options...
Sarnie Posted July 28, 2006 Share Posted July 28, 2006 Offset is the distance from the mounting face of the wheel spider to the rim centerline That was 16 words but cheers Quote Link to comment Share on other sites More sharing options...
Blacky Posted July 28, 2006 Share Posted July 28, 2006 or in 10 words or less Offset, distance from mounting face of spider to rim centerline Quote Link to comment Share on other sites More sharing options...
Sarnie Posted July 28, 2006 Share Posted July 28, 2006 or in 10 words or less Offset, distance from mounting face of spider to rim centerline Thats more like it But what does it mean? Quote Link to comment Share on other sites More sharing options...
Removed Posted July 28, 2006 Share Posted July 28, 2006 offset is also dictated by the very model of the wheel itself, ie every model will need a "different " offset as wheels are different models, hence why it gets very confusing. to add to the discussion, I'm sure mine are 9F with +28 and 10R with +25 Quote Link to comment Share on other sites More sharing options...
mugwump Posted July 28, 2006 Share Posted July 28, 2006 Im with sarnie! This is the most confusing thread I think I have ever read! and believe me I have read a few. Just a few noddy questions..... The wheel width is in inches (duh!) but I assume that the "+22" offset from centreline measurements you are talking about is in mm???? Is this correct? Also, which way is +ve and which -ve. So does a +ve measurement move the centre hub toward the outside rim of the wheel and a -ve inboard? Also, how far is it from the face of the wheel hub to the face of the wheelarch front and back. I assume this is the measurement that will tell me if a wheel will sit prone of the arch. So would the wheel width / 2 + the offset - the distnce mentioned above tell me how far proud or not the wheel will be? Or have I understood nothing (very likely!) Quote Link to comment Share on other sites More sharing options...
Rob_Quads Posted July 28, 2006 Share Posted July 28, 2006 yes offset is in mm +22 means the centre of the wheel is 22mm towards the inside of the arch i.e. engine side If you put a 10mm spacer on it would push it out 10mm bringing it OUT to +12 As for the how far is it - take the width, Divide by 2 - that gives you the distance from the middle. If you have a +ve offset subtract that number to the number to give the distance to the outside lip. If you have -ve offset add that number to get the distance to the outside lip Quote Link to comment Share on other sites More sharing options...
Sarnie Posted July 28, 2006 Share Posted July 28, 2006 yes offset is in mm +22 means the centre of the wheel is 22mm towards the inside of the arch i.e. engine side If you put a 10mm spacer on it would push it out 10mm bringing it OUT to +12 As for the how far is it - take the width, devide by 2 - that gives you the distance from the middle. Then if you have a +ve offset add that number to the number to give the distance to the inside lip. Subtract for the distance to the outside lip Still gibberish i'm afraid Quote Link to comment Share on other sites More sharing options...
Digsy Posted July 29, 2006 Share Posted July 29, 2006 yes offset is in mm +22 means the centre of the wheel is 22mm towards the inside of the arch i.e. engine side If you put a 10mm spacer on it would push it out 10mm bringing it OUT to +12 As for the how far is it - take the width, devide by 2 - that gives you the distance from the middle. Then if you have a +ve offset add that number to the number to give the distance to the inside lip. Subtract for the distance to the outside lip Still gibberish i'm afraid Glad it's not just me! I'm a bit concerned in case I order from the States and get this wrong..... Quote Link to comment Share on other sites More sharing options...
Blacky Posted July 29, 2006 Share Posted July 29, 2006 yes offset is in mm +22 means the centre of the wheel is 22mm towards the inside of the arch i.e. engine side If you put a 10mm spacer on it would push it out 10mm bringing it OUT to +12 As for the how far is it - take the width, devide by 2 - that gives you the distance from the middle. Then if you have a +ve offset add that number to the number to give the distance to the inside lip. Subtract for the distance to the outside lip Still gibberish i'm afraid Glad it's not just me! I'm a bit concerned in case I order from the States and get this wrong..... Digsy mate just pop along to http://www.my350z.com/ I bet your bottom dollar there's somone there that already has the wheels,offsets,tyres sizes your looking for. Quote Link to comment Share on other sites More sharing options...
Removed Posted July 29, 2006 Share Posted July 29, 2006 unless you order wheels that have never been seen on a Z like mine I just had to tell the Company I used my requirements, and trust them and WORK to deliver, which they did Quote Link to comment Share on other sites More sharing options...
Digsy Posted July 29, 2006 Share Posted July 29, 2006 yes offset is in mm +22 means the centre of the wheel is 22mm towards the inside of the arch i.e. engine side If you put a 10mm spacer on it would push it out 10mm bringing it OUT to +12 As for the how far is it - take the width, devide by 2 - that gives you the distance from the middle. Then if you have a +ve offset add that number to the number to give the distance to the inside lip. Subtract for the distance to the outside lip Still gibberish i'm afraid Glad it's not just me! I'm a bit concerned in case I order from the States and get this wrong..... Digsy mate just pop along to http://www.my350z.com/ I bet your bottom dollar there's somone there that already has the wheels,offsets,tyres sizes your looking for. Cheers, Blacky. Will have a look! Get another bonus in August but too late for the Nismo zorst. Some wheels may lessen the pain when you guys are rubbing it in. Quote Link to comment Share on other sites More sharing options...
Baptist Posted July 29, 2006 Share Posted July 29, 2006 unless you order wheels that have never been seen on a Z like mine Probably a very good reason for that.........................LOL Quote Link to comment Share on other sites More sharing options...
Removed Posted July 30, 2006 Share Posted July 30, 2006 unless you order wheels that have never been seen on a Z like mine Probably a very good reason for that.........................LOL yeah coz they are proper stuff not like yours that you had to replace after a year Quote Link to comment Share on other sites More sharing options...
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