Wheel offset

[aventino68]

Can someone check I have my numbers correct. My wheel manufacturer can make my wheels so the distance from wheel hub flange to inner rim is 3.45" if its maximum outer lip I'm looking for. i.e. hubs as far in as possible, diff housing as narrow as possible etc.
Wheels are 20x15"
Vertical centreline at halfway point 7.5"
35% of total wheel width is 35% of 15" equals 5.25"
So I am allowed 5.25 from vertical centreline positive or negative which places my wheel hub flange 2.25" from the inner rim. 
Therefore the 3.45" that is the max offset he can give me from inner rim to hub flange is well within the lvvta guidelines? We use a different measuring system from the rest of the world so Id like to make sure I'm legal.

Thanks,

David

[Leon]

Hi David,

Oh no, you're trying to make a metric man think in imperial!

My number crunching agrees with yours, 5.25 either side of the wheel center line of the wheel, *unless*

(b) in the case of an offset outside of the requirements specified in 2.2(8)(a),
either:
(i) be used in association with axle and hub components from a
vehicle which are substantially heavier than the vehicle to which
the suspension and axle componentry is now fitted; or
(ii) be used in association with a fully-floating hub and axle assembly;
or
(iii) meet the requirement of 12.13.1 of Chapter 12 of the New
Zealand Hobby Car Technical Manual.

www.lvvta.org.nz/documents/standards/LVVTA_STD_Wheels_&_Tyres.pdf
Page #9

NB, Hobby Car Technical Manual is now called the Car Construction Manual, and can be bought online, and by chapter.

www.lvvta.org.nz/shop/