255/50/15 = 3.7:1 Final Drive Gear Ratio?
03-27-2008, 02:22 AM
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255/50/15 = 3.7:1 Final Drive Gear Ratio?
Hi. I'm not sure if a 15" wheel would fit on a 2008 350Z.
If it would, what would a 255/50/15 tire do to the final drive gear ratio?
Using a tire/gear calcultor (link) I figure that it would change the final drive ratio to a 3.7:1.
All calculations were done assuming that the final drive ratio on a stock base 350z is 3.5:1.
If it would, what would a 255/50/15 tire do to the final drive gear ratio?
Using a tire/gear calcultor (link) I figure that it would change the final drive ratio to a 3.7:1.
All calculations were done assuming that the final drive ratio on a stock base 350z is 3.5:1.
Last edited by SpdFreak; 03-27-2008 at 02:27 AM.
03-27-2008, 06:46 AM
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Originally Posted by SpdFreak
Hi. I'm not sure if a 15" wheel would fit on a 2008 350Z.
If it would, what would a 255/50/15 tire do to the final drive gear ratio?
Using a tire/gear calcultor (link) I figure that it would change the final drive ratio to a 3.7:1.
All calculations were done assuming that the final drive ratio on a stock base 350z is 3.5:1.
If it would, what would a 255/50/15 tire do to the final drive gear ratio?
Using a tire/gear calcultor (link) I figure that it would change the final drive ratio to a 3.7:1.
All calculations were done assuming that the final drive ratio on a stock base 350z is 3.5:1.
Last edited by scotts300; 03-27-2008 at 01:15 PM.
03-27-2008, 02:24 PM
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Originally Posted by Gooey
that seems about right. I have 275/50/15 Dr's and it does shorten the ratio on top of my 4.083
What brand drag radial are you using?
Can you give me all the info on your setup?
Is that the widest tire that won't rub?
I have a VQ35HR 350Z. The track is open and I need to choose a drag radial / wheel sutup asap.
All help is much appreciated.
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03-27-2008, 07:25 PM
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Originally Posted by Gooey
I have a 15x8 Jegs wheel with 5.5 backspacing. Theres plenty of room and the tires do not rub. Its just the max width I would go with the wheels being 8in wide.
Last edited by SpdFreak; 03-30-2008 at 01:39 AM.
04-04-2008, 09:15 PM
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The 15x8 welds or jegs or summit copies with 5.5 backspacing work very well. For a 50 series tire, 8" rim is plenty wide to put a nice amount of sticky meat on. 275 50 15 is very common, I plan on getting the Mickey Thompson street ets after I wear out my Hoosier slicks. BTW the jegs and summit weigh much more than the forged aluminum welds, but the welds require long shank 1-3/8" lugnuts in order to mount them. If you are refering to an 8" wide wheel, than 5.5" backspacing would equal +38 offset.
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