[357]

Alright, I have searched and failed to come up with a clear answer, I know as soon as you change the tyre size the speedo will be out, but what can I do to fix the speedo? I want to fit 215/75/15 tyres in place of the standard tyres has anyone worked around this or just dealt with the speedo being out slightly

[jimny_timmy]

What model jimny have you got? 215's on a VVT will actually put it back to normal.

Edit: jaycar also do a DIY kit to fix it too

[357]

2008 vvt manual

[jimny_timmy]

Yep 215s will correct your speedo to pretty much perfect

[357]

So my speedo is out already?

[jimny_timmy]

If you're running 205/70r15, yes.

Go for a run with a gps device and you'll see it reads approx 5km/h slower than what it says on the speedo

[357]

I've actually noticed that, to come to think of it I've noticed that in all the cars I've owned

[Buckshot]

jimny_timmy wrote:

Yep 215s will correct your speedo to pretty much perfect

Yep, same thing happened on my 2008 Jimny.

[Reubs]

357 wrote:

I've actually noticed that, to come to think of it I've noticed that in all the cars I've owned

Virtually every new car comes out of the factory that way. 3-7% under is common.

[fully sick coily]

i have 30's on my coily and it isnt out
is this normal?

[Reubs]

fully sick coily wrote:

i have 30's on my coily and it isnt out
is this normal?

If you have a transfer from a WT fitted which is designed to have 3.7 diff gears, then the speedo would be close enough to seem correct.

Speedo gears corresponding to a 3.7 diff with 3.9 diffs will give the speedo 5% correction already, factor in 5% error from the factory and your 30" tyres are close enough to the 10% error.

[sideways]

AFIAK in Aus, speedos have to read between between 0 and 10% lower than the actual speed.... Measured at 40 and 100km/h. (I think)

My 1l with 30s still reads 3-4km slow, well it did until the speedo cable snapped the other day.

[Mike57]

My 2009 is now spot on with 215/75's

[jimny_timmy]

I bought the speedo correction kit from Jaycar today... Fffffuuuuuuck it's gonna take aaaaages to just build the thing lol