Jump to content
Sign in to follow this  
Dan260Z

Standard wheel offset for a 260z 2+2?

Recommended Posts

Hi,

 

A bit of searching turned up mostly speculation about the standard wheel's offset... I'm hearing everything from 0mm, +4mm, and +12mm.

 

Measuring my factory 5.5" mags, I get +25mm, and about the same from the stock 4.5" steel spare, which is counter to everything else I've heard.  It is possible I'm not measuring it correctly of course (distance from the hub face the inner bead, then subtract wheel width/2?)

 

The reason I need to know is, in order to maintain track within +1" for engineering purposes, I need to know the original offset in order to calculate how much a set of +0mm offset XXR522's will add to the track (before shelling out the cash preferably!).

 

Any help will be greatly appreciated!

 

 

 

 

Share this post


Link to post
Share on other sites

I measure the width of the rim, then mark the center. Then get a straight edge across the hub and mark where the hub sits compared to the center of the rim then measure.

Share this post


Link to post
Share on other sites

Hi Dan

 

I just went through that with a 1973 240. I measured my standard, steel wheel offset to be  plus 15 mm. That is also stated in and old workshop manual that I have, for the early four and a half inch wheel and also the five inch steel wheel.

Perhaps double check you measuring and calculations.

 

 

Peter

 

 

Share this post


Link to post
Share on other sites

Hi, for what it's worth the factory 260z alloys have all the specs on them. 5 1/2-J x 14 15. The 15 is +15mm offset.

Share this post


Link to post
Share on other sites

as what has been mentioned the specs according to datsun 260z service manual

 

Rim Size: 14x5J +15

PCD: 4x114.3

Tires: 195/70VR - 14

Tire Pressure Under 160km/h (cold): 28PSI

Tire Pressure Over 160km/h (cold): 32PSI 

Share this post


Link to post
Share on other sites

Thanks guys - yep you're right indeed they do have them cast on them in raised lettering.  unfortunately, technically that means by fitting +0mm offset wheels I'll increase track by 30mm (max allowable on IRS is 25mm)... but for some odd reason with the 0mm wheels fitted, measuring from the centre of the tread it still falls within 25mm of the factory stated track width of 53".  Why i don't know - but it's a good thing! 

Share this post


Link to post
Share on other sites

Thanks guys - yep you're right indeed they do have them cast on them in raised lettering.  unfortunately, technically that means by fitting +0mm offset wheels I'll increase track by 30mm (max allowable on IRS is 25mm)... but for some odd reason with the 0mm wheels fitted, measuring from the centre of the tread it still falls within 25mm of the factory stated track width of 53".  Why i don't know - but it's a good thing!

The only way that could be possible is if you are using a wider than standard rim, and yes it's a good thing.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

×