Can anyone tell me if the measurement across the width of the front wheel base and the rear wheel base please?

Reason being is, I have been trying to set the rear wheel alignment and would like to know if there is an offset between the front axle and the rear axle. My initial hopes are that there is.

Either that or I am way off! Lol

Do you have standard wheels ? (and if so, Jap or UK wheels?)

front=58.9 inch

rear=61.2 inch

 

stock sizes.

If it has Standard UK wheels Fitted :

front : 1496 mm

rear : 1554 mm

 

If it has Standard JDM wheels Fitted :

front : 1496 mm

rear : 1534 mm

 

If its got anything but standard wheels then you will need to know the Wheel widths, offsets and if there are any spacers fitted, in order to calculate the New Front and Rear Track.

Edited June 24, 201213 yr by Yowser

as a rule of thumb the driven wheels on any car are on a wider track than the others... after market mods non inclusive.... I mean Yowser or others will reel this off by heart but deffo in the right arena. In trouble if it were the other way around

haha.. and he did as i typed.. top man!

Thanks Yowser.

Not sure about the wheels, only thing I do know is that they are not original. 16" I believe. Speed line. Other than that I don't know.

 

Sounds promising Mantav8. I am hoping to strike a line from the rear wheel to the front wheel and with a bit of luck will have the correct offset. If I get an equal reading from both sides and it tallies with your figures, hopefully I will be somewhere close.

Thanks Yowser.

Not sure about the wheels, only thing I do know is that they are not original. 16" I believe. Speed line. Other than that I don't know.

 

Sounds promising Mantav8. I am hoping to strike a line from the rear wheel to the front wheel and with a bit of luck will have the correct offset. If I get an equal reading from both sides and it tallies with your figures, hopefully I will be somewhere close.

 

Those numbers posted by myself and MantaV8 are the Front and Rear Tracks. They are measured from the centre of one wheel to the centre of the other wheel (Not from edge to edge)

 

The offset is affected by wheel width and wheel offset, so If your not running after-market wheels then its likely you wont have the same front and rear track.

Ok, at the risk of embarrassing my self, i think all 4 wheels are the same offset but with a shade wider tyres on the rear.

Does that sound correct? If so, can I just measure the difference between front and rear wheels?

Ok, at the risk of embarrassing my self, i think all 4 wheels are the same offset but with a shade wider tyres on the rear.

Does that sound correct? If so, can I just measure the difference between front and rear wheels?

 

If they are the same width wheels and offset all round, then you should see a 38mm difference between front and rear.

Cool Yowser,

 

I hope to get some measurements done tomorrow night.

I will report back. Hopefully with good news!

Rim width has nothing to do with offset, and no effect on track width. Hub width - wheel offset = track width.

Not sure that I have been using this Trakrite plate correctly.

Each time I check the tracking I get different readings!!

Can anyone tell me if I should be aligning it with the side of the car in some way? up until now, I have been using a straight edge across the the rim of the rear wheel and aligning it to that by eye. Not sure if that is right now though!!

Maybe I should string a line from the front wheels and align it to that?

Help pleeeease.

Rim width has nothing to do with offset, and no effect on track width. Hub width - wheel offset = track width.

Not sure where you got your info from but it is wrong.

 

Track width is the distance between the centre line of opposing wheels. It is very much affected by wheel width and offset.

Edited June 26, 201213 yr by Yowser

Not sure that I have been using this Trakrite plate correctly.

Each time I check the tracking I get different readings!!

Can anyone tell me if I should be aligning it with the side of the car in some way? up until now, I have been using a straight edge across the the rim of the rear wheel and aligning it to that by eye. Not sure if that is right now though!!

Maybe I should string a line from the front wheels and align it to that?

Help pleeeease.

 

Im not familiar with the Trakrite system, but Stringing is still a popular method used in modern forms of Motorsport, especially at Track-side tuning. Go for it if it aids you in confirming or better understanding results from your trackrite. Providing you keep the string taught and take measurement from equal points, its fine for determining relative measurement either side.

 

Coincidently, I was watching the development of a new Wheel alignment system on our Formula Ford today that took laser mapped images of all four wheels, and displayed them on the screen with no physical connection to the vehicle at all.

Edited June 26, 201213 yr by Yowser

Thanks Yowser.

I appreciate your help!

Tried a few more attempts at trying to get some consistent readings with the Trakrite tonight, not very consistant. Apparently, there are so many contributing factors such as tyre pressures, settling the suspension, to name but a few. I think I will wait until the weekend until I try again and combine the new readings along with some string measurements.

Not sure I will ever be confident enough though.

OK. Decided to persevere with the Trakrite, I have to say, I managed to get some pretty consistent results.

Seems to be that the most influential factor is the Trakrite being on level ground and being stable when you drive over it!

Once I had set both rear wheels with a very slight toe out, I set about taking some string measurements so as to check the offset between front and rear wheels.

Taking the fact that I had to assume the front wheels are correct, I measured the difference between the rear wheels and the front, to my joy, I returned measurements of 20mm offset per side. Based I my understanding, that's pretty good I think.