Question for the forum. (1 Viewer)

[Wayne BJ73]

Hi there all

I have a question in regards to gearing/speedo's etc

As a few would know on this forum I have a BJ73 fitted with a 2H diesel/5 speed and I have 33" BFG allterrain tyres fitted how will this effect my speedo. Will it read low/high:

Is there a forumula you can use:

Would love to find out.

Many thanks

Wayne Ellard
Flinders Rangers South Australia

 

[1990 LJ78]

HeyWayne BJ73..
The easiest way to check how far out your speedo is with big tiers, is to use a GPS unit on a nice straight, flat stretch of road. set it to give travel info, it should give speed among other things. I have two in my truck one was installed in the dash. The other is a hand held that I keepin the glove box for out of truck use.
If you do not have one borrow one from a freiend..It is real time info..You will know within minutes how far out your speedo is.
I put new tiers on my truck and found that my speedo was now out by 5k/h. in just 5 minutes of leaving the shop.
Saves all those calculations..

 

[brownbear]

Another way is if you have a section of highway that has the lines on it for a 10k distance, marked out every Kilometer. We have that in different places around Canada for checking your odo.