True reading of oddometer

Hi does anyone know by how much the jimny oddometer under reads by with 30" x 9.5" x 15" tyres fitted

There's a site called grimjeeper which allows you to calculate the gearing of any particular combination of tyre and gearbox combinations. The actual ratios of all the Suzuki gearboxes and transfer boxes are available in the wiki section at the top of the page. Also be aware that the cluster over reads the mph by approximately 3 on standard gearing and tyres so 30 indicated is about 27 actual.

Depends on your gearing too...

My daily driver has 235/75/15s on it, it's a VVT and the transfer box and diffs have been swapped to earlier ones to correct the gearing and also the speedo / odometer.

My weekend toy S200KYS has 31"x10.5"x15" tyres on it, but it's fitted with a Samyrai transfer box with a 4.87:1 gearset in it, so again the speed / odometer are about right...

The buggy I'm building is having 29" tyres (235/70R16) but I'm swapping the diffs to VVT 4.3:1 (from 3.9:1 diffs) to correct the gearing and odometer.

Here you go, back to your original questin, if your gearing is stock -



From - tiresize.com/calculator/

Best thing you can do imo just use a satnav for your speedo
That's what i do :laugh:

Or use a GPS

Oooh, thanks for that site S200, I've always used willtheyfit.com but that one doesn't get on with imperial sized 4x4 tyres.

Happy to help...

Old skool calculator

That is very good information thank you. However i may have asked the wrong question. What i would like to know is how much the trip meter/ milometer under reads by with 30" x 9.5" x 15" tyres fitted with standard gearing?