Author Topic: Sizes and Offsets.... FD Fitment  (Read 19801 times)

Offline Fish

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Sizes and Offsets.... FD Fitment
« on: December 28, 2002, 05:51:03 PM »
We are asked every so often about what are the correct sizes and offsets of the standard fit wheels and tyres for an FD.

16 Inch Wheel

Wheel diameter
16 Inch
 
Wheel rim width
8JJ
 
Genuine installing tire size
The 225/50R16 (with the grade the ZR)
 
Wheel offset
+50 (mm)
 
P.C.D.
114.3 (Mm)
 
Standard major diameter of tire of this size
632-635mm
 

17 Inch Wheel  

Wheel diameter
17 Inch
 
Wheel rim width
Front 8JJ
Rear 8.5JJ
 
Genuine installing tire
Front:235/45ZR17
Rear:255/40ZR17
 
Wheel offset
+50 (mm)
 
P.C.D.
114.3 (Mm)
 
Standard major diameter of tire of this size
Front:644mm
Rear:640mm

Dan

Edited to say that they are for an FD. Thanks Jason
« Last Edit: January 18, 2003, 08:34:02 PM by Fish »

Offline Grizzly

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Sizes and Offsets....
« Reply #1 on: January 18, 2003, 07:34:18 PM »
Does anyone have all this Info for Fc\'s?

I already have 18" fitted (i belive my offsets are 38)

But i am going to buy some 17"

Chris

Offline MikeLMR

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Sizes and Offsets....
« Reply #2 on: February 11, 2003, 01:08:36 PM »
anyone got the PCD\'s and offsets for first gens


I think they are as follows but I need confirmation quick ;)

1979-83  110mmPCD x 4 with 25(?)mm offset

1984-85  114.3mmPCD x 4 with 40mm offset (4.5" PCD)

anyone care to confrim this please :)
« Last Edit: February 05, 2004, 06:07:55 PM by MikeLMR »

Offline <--rYaN-->

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Sizes and Offsets....
« Reply #3 on: April 17, 2003, 01:45:26 PM »
what about 18 inch and 19 inch fitments?? any problems there??

which of these would be best for 19 inch on a 3rd gen?

SIZE - 1975
OFFSET -  +43 or +48
P.C.D.  -  8-100/ 114.3 or  5-114.3


dont understand these measurements myself, what measurements would they be tyre wise?? want some nice wide rear tyres, mine are 265 at the moment i think at the back..
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Offline Fish

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« Reply #4 on: April 17, 2003, 02:07:42 PM »
Ryan, the link below will help work out the correct tyre size that would be required. The sizes given above are official Mazda fitments, and as they never fitted 18\'s or 19\'s, I guess that when purchasing the wheels, get the company to work out which size/offset would be best. But unless you can try the wheels on the car, it would be a little bit of a gamble as the whether they could rub either the arches of the suspension.

http://www.tyresave.co.uk/tyresize.html

Dan

Offline rotorhead666

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Sizes and Offsets....
« Reply #5 on: June 02, 2003, 12:01:47 AM »
Quote
Originally posted by MikeLMR
anyone got the PCD\'s and offsets for first gens


I think they are as follows but I need confirmation quick ;)

1979-83  110mmPCD x 4 with 40mm offset

1984-85  114.3mmPCD x 4 with 40mm offset (4.5" PCD)

anyone care to confrim this please :)

 
Mike,now i really am confused!just been ona US wheels site,which says 85 RX-7s have 4x110 pcd.performancealloys.com says 78-83 is 4x110,and 84-85 is 4x114.3,as you say.i really need to know which it is for an 85,cos i\'m after a set of 15" oz hydras.:)
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Offline Ric

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Tyre sizes for 18s and 19s
« Reply #6 on: January 27, 2004, 04:42:27 PM »
Whilst answering a question the other day I calculated the correct tyre sizes for 18s and 19s on an FD.

This will only tell you the correct (and legal) external diameter. I can\'t gaurentee that these sizes will fit properly and not rub etc depending upon your wheels. Also what difference it will make to handling etc:

Standard wheel (and tyre) size external diameters:

Front: 650mm
Rear: 645mm

18s

Front:
225/40/18 (645mm external diameter)
or
235/40/18 (655mm external diameter)

Rear:
255/35/18 (645mm external diameter)
or
265/35/18 (650mm external diameter)

19s

Front:
235/35/19 (650mm external diameter)

Rear:
265/30/19 (650mm external diameter)
ric (rexy has gone now all I have left is NFSU2 :( )

Offline BlitzBoy

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« Reply #7 on: February 09, 2004, 06:02:42 PM »
How much do the standard 16inch alloy FD wheels weigh? I had the info but lost it?
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Offline Martiny

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Sizes and Offsets....
« Reply #8 on: May 13, 2004, 10:53:29 AM »
Another site that lists useful PCD\'s

http://www.bgworldwheels.co.nz/fitment_mazda_main.html

I believe the RX-2\'s  4 x 110 is unusual. However, I did find a useful site.  

http://klubas.autos.lt/index.php?group=technika&topic=zinynas&src=wheels


Found some other cars with the same PCD.

Volvos , Peugeots, and Rover Metro!

Offline Steve Burnett

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« Reply #9 on: May 16, 2004, 02:32:20 PM »
Just wanted to check if these wheels are okay. PCD 5 x 114.3, size 17x8(front) 17x9(rear) offset +45
Will this be okay on the FD with 5mm spacers?

J4P RX

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Sizes and Offsets....
« Reply #10 on: May 16, 2004, 03:04:09 PM »
Yeah should be :)

Mark C

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Sizes and Offsets....
« Reply #11 on: July 14, 2004, 07:09:27 PM »
Hi any chance of adding the recommended tyre pressure\'s for the various sizes i have 17\'s on mine but not sure what the pressure should be, i assume the info on the door frame is for standard wheels and isn\'t necessarily correct for larger wheels.


Thanks
Mark

Offline Ric

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Sizes and Offsets....
« Reply #12 on: July 15, 2004, 08:21:58 PM »
Tyre pressure should be the same whatever size tyres/wheels really although a lot is down to personal preference.

Off the top of my head I think the Mazda recommendation is 29psi front and 31psi rear for road use - It\'s probably written in the door sill but you\'ll need to convert to psi from bar or something.

If you are running on a track you might want as much as 10psi more (especially on higer profile tyres) to prevent wear on hard cornering.
« Last Edit: July 15, 2004, 10:13:47 PM by Ric »
ric (rexy has gone now all I have left is NFSU2 :( )

Mark C

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Sizes and Offsets....
« Reply #13 on: July 15, 2004, 08:50:07 PM »
Thanks for the info i figured it to be somewhere around 30psi, seems to be around the norm for most cars / tyres.

Thanks
Mark

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Will these rims fit all right?
« Reply #14 on: March 09, 2005, 04:54:10 PM »
I\'ve found some 18s for sale I\'d like for my FD but not sure if the offsets are  will fit.

They are:

front - 18x8.5 (ET30

rear - 18x9.5 (ET38)

I know this size of wheel will fit, just not sure about the offsets.

Any help would be gretaly appreciated.