Tyre size/ speedo deviation calculator...

not quite what you wanted...

I already have that one Voxson... If I remember correctly, you would put in your stock numbers i.e. 225/75-16 and put in your new size i.e. 265/75-16 and it would say " your speedo will read "X"% over/under...

Try this one:

" target="EOF" class="lbg">www.miata.net/garage/tirecalc.html

Peter

this ones a good read
www.carbibles.com/tyre_bible.html

Richard

This is that one Blue the URL is " target="EOF" class="lbg">www.miata.net/garage/tirecalc.html

Try HERE fine person

Thanks for the effort there Peter that was the calculator I remember although the page came up as an error... Thanks Bonz for sorting the link to Miata... Richard, that is a good read, although my brain is somewhat foggy from a long weekend in Mansfield...

Interesting pile of links there Richard, thanks...

Thanks rooscooter, that's the one I was after and now have safely in my bookmarks until the next re-format, which shouldn't be too far away given the sites this computer takes me to(I swear I was looking up Saddle Club for my niece, crikey thank goodness she didn't type it in as I have no "net-nanny" to speak of)

G'day Norm,
I thought that only happened on the patrol, a few of us have found the same thing, when I went to the larger 265/75 from the standard 265/70, a 4% increase, the speedo now reads 100% accurate, on a recent trip the GPS and the trip metre were an exact match to the metre, and the speeds shown are the same aswell, yet with the standard tyres on the speedo would read 100kph and the GPS would read 96kph.
I wonder if the manufacturers are doing this on purpose.

Avagoodn
Perry

hey hey g'day

not sure if i duplicated the link in my post but it seems to work.... after entering your new tyre sizes it shows underneath the graph the percententage either faster or slower relative to speedo reading

____________________________________________________________________

lifes a garden........ dig it

Darren, Jaycar make some interesting kits... I think the speedo corrector was only for "fly-by-wire" speedo's, a step-up/down gearbox is required for cable speedo's.

Katherine, there is much debate about how much bigger one can go and still be legal... On here(I think) and on www.outerlimits.com there has been some talk about a new figure of 50mm... The VicRoads website still clearly states 15mm but I'm willing to take the risk anyway, as I said I only have them on a few times a year...(Waits for Murphy to step in)

One part of your previous question I didn't answer was whether or not they stick out past the gaurds... Yes they do, by about an inch. When the axles articulate they don't foul the gaurds so I don't worry too much about it(although that's illegal also). A different offset rim may help you out there, mine are supposedly "standard Patrol" offset...??? There isn't a whole lot of room on full steering lock for a much shallower offset but if you speak to an expert they could probably steer you in the right direction.

Spoke to few tyre shops and only one off them knew what the law is when fitting larger tyres. He said i should ask the RTA, which i did and 15mm larger OD over standard rule also applies in NSW. Which makes you think how many 4x4's and CARS out there are actually legal?????
Keeping it legal means no probs with insurance when you need to make a claim.
Knowing this, im off looking for the best deal on some wheels/tyres.
Thanks for the tips and advice.

Katherine