Conversion table for bigger rims/tires - SR20 Forum
 
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#1 (permalink) Old 03-29-2007, 12:51 PM
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Conversion table for bigger rims/tires

ba ha ha ha]

My other NX....is an NX.

Last edited by Canx2k; 07-15-2009 at 05:17 PM.
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#2 (permalink) Old 03-29-2007, 01:01 PM
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Stock rim sizes:

NX 14" rims:
6.0Jx14
40mm
Tires were 195/55-14.

B14:
195/55/15

if anyone would like to add to this or correct me, please do.

another fantastic conversion table can be found on:
http://www.1010tires.com/TireSizeCalculator.asp

My other NX....is an NX.

Last edited by Canx2k; 03-29-2007 at 02:50 PM.
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#3 (permalink) Old 03-29-2007, 01:28 PM
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Unless someone can prove me wrong, nothing beats Mark Sink's calculator.
http://marksink.com/tire_wheel_offset/tires.html

This is the first time I've looked at it in a while, and it's better than ever.

C

cogito ergo zoom................
1994 SE-R / DE / S4 / Nismo LSD / Calum Realtime / Hyperco - AGX / 15x7 RPF1
1995 Turbo Miata R Package / GT2560R turbo / Megasquirt / Flyin Miata suspension / 15x8 949 6UL
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#4 (permalink) Old 03-29-2007, 01:40 PM
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Are all 16" rims able to fit any of the first numbers? According to that table, If I was to go with a tire that is 185-45-r16 or 195-40-r16 or 205-40-r16 I'd be ok. The rims I have right now have 205-45-r16 on them, and I need to know if any of those sizes will still fit the rim.

these are the rims I have:
http://store.summitracing.com/partde...5&autoview=sku

My other NX....is an NX.

Last edited by Canx2k; 03-29-2007 at 01:50 PM.
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#5 (permalink) Old 03-29-2007, 01:48 PM
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If you're talking about the link I sent, it doesn't account for rim width. It's really best to use if you're starting with your stock size tires and want to know what fits and keeps you within a specific speedometer error range (in other words, staying as close to stock diameter as possible).

What car do you have, and what's the stock size tire?

C

cogito ergo zoom................
1994 SE-R / DE / S4 / Nismo LSD / Calum Realtime / Hyperco - AGX / 15x7 RPF1
1995 Turbo Miata R Package / GT2560R turbo / Megasquirt / Flyin Miata suspension / 15x8 949 6UL
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#6 (permalink) Old 03-29-2007, 02:00 PM
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I have a NX, stock 14" tires. The rims I've got are riaxx seca 16" tires. They have a 7" width according to the website.

My other NX....is an NX.
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#7 (permalink) Old 03-29-2007, 02:12 PM
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NX's came with 195/55/14's stock. So plug that into the calculator, set the max size to 16" 225mm and 2mph error, and you'll get a bunch of results. Not all of the results are actual sizes that are made though.

A 205/40/16 is the closest match in overall diameter, and there are allot of tires available in that size. You don't want a 185 or 195, it's just too narrow for a 16", and there are only a few made.

As far as what will fit on a 7" rim, a 205 will be fine.

C

cogito ergo zoom................
1994 SE-R / DE / S4 / Nismo LSD / Calum Realtime / Hyperco - AGX / 15x7 RPF1
1995 Turbo Miata R Package / GT2560R turbo / Megasquirt / Flyin Miata suspension / 15x8 949 6UL
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#8 (permalink) Old 03-29-2007, 02:14 PM
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sweet. thanks again chris, you once again prove yourself to be the best at this stuff.

the offset on the nx is 40, this rim says +42mm, do i need a spacer at all then?

My other NX....is an NX.
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#9 (permalink) Old 03-29-2007, 02:18 PM
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Hehe, don't ask me. Offset confuses the hell out of me.

C

cogito ergo zoom................
1994 SE-R / DE / S4 / Nismo LSD / Calum Realtime / Hyperco - AGX / 15x7 RPF1
1995 Turbo Miata R Package / GT2560R turbo / Megasquirt / Flyin Miata suspension / 15x8 949 6UL
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#10 (permalink) Old 03-29-2007, 02:31 PM
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Quote:
Originally Posted by Canx2k View Post
Stock rim sizes:

NX 14" rims:
6.0Jx14
40mm
Tires were 195/55-14.

B14:
195/55/16

if anyone would like to add to this or correct me, please do.

another fantastic conversion table can be found on:
http://www.1010tires.com/TireSizeCalculator.asp
i'm thinking it's just a typo, but the B14 SE-R came with 15" stock wheels.

Robert Sousa
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#11 (permalink) Old 03-29-2007, 02:50 PM
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whoops! my bad, edited.

My other NX....is an NX.
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#12 (permalink) Old 03-29-2007, 03:00 PM
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Quote:
Originally Posted by Canx2k View Post
sweet. thanks again chris, you once again prove yourself to be the best at this stuff.

the offset on the nx is 40, this rim says +42mm, do i need a spacer at all then?
anyone?

My other NX....is an NX.
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#13 (permalink) Old 03-29-2007, 03:52 PM
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Lower the number = wider the track, because it's positive offset. With a 7" wide wheel, I've found a +35 offset to be perfect for the NX2000.

James
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#14 (permalink) Old 03-29-2007, 04:35 PM
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edited

My other NX....is an NX.

Last edited by Canx2k; 03-29-2007 at 04:53 PM.
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#15 (permalink) Old 03-29-2007, 04:51 PM
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Ok, so I guess going from 40 to a 42 isn't a big deal from what i've been reading. But I'm a little wary on going to 16" rims which are 1" thicker, bolting them up and getting rubbing. I have stock shocks, so would I need a spacer, or anything of that sort to prevent rubbing?

My other NX....is an NX.
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#16 (permalink) Old 03-29-2007, 06:37 PM
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Quote:
Originally Posted by chriscar View Post
Unless someone can prove me wrong, nothing beats Mark Sink's calculator.

C
http://www.miata.net/garage/tirecalc.html

woot!

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#17 (permalink) Old 03-29-2007, 07:15 PM
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Originally Posted by llaprad1 View Post
No way, Sink's is way better.

C

cogito ergo zoom................
1994 SE-R / DE / S4 / Nismo LSD / Calum Realtime / Hyperco - AGX / 15x7 RPF1
1995 Turbo Miata R Package / GT2560R turbo / Megasquirt / Flyin Miata suspension / 15x8 949 6UL
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#18 (permalink) Old 03-30-2007, 07:17 PM
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Coolness. When I did my tire fitting I just dialed in Google and looked at what popped up (1010, Tirerack, miata). I like the Sink page, Chris. Thanx.
Jer

'93 B13, etc.
If you don't have the patience
to do it right the first time,
how is it you have the time to
do it over and over again?
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#19 (permalink) Old 03-31-2007, 10:53 PM
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You have been assimilated.

http://www.sr20forum.com/driveline-transmission/170794-b13-b14-b15-suspension-information.html

See "A Few Words About Wheels and Tires."

Great thread, excellent information.

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'93 Classic - Original Owner, "OEM Plus" modifications

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