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BigJimny Meet 2019 (17 May 2019)

BigJimny Meet and off-road driving day



20TH OCTOBER 2019

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True reading of oddometer

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26 Jun 2019 21:51 #210344 by ianm
Hi does anyone know by how much the jimny oddometer under reads by with 30" x 9.5" x 15" tyres fitted

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27 Jun 2019 04:23 #210345 by Lambert
Replied by Lambert on topic True reading of oddometer
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.

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27 Jun 2019 15:21 #210375 by S200KYS
Replied by S200KYS on topic True reading of oddometer
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/

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27 Jun 2019 15:35 #210376 by jackonlyjack
Best thing you can do imo just use a satnav for your speedo
That's what i do :laugh:

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27 Jun 2019 15:36 #210377 by Jim Jim
Replied by Jim Jim on topic True reading of oddometer
Or use a GPS

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27 Jun 2019 17:53 #210380 by Caelite
Replied by Caelite on topic True reading of oddometer
Oooh, thanks for that site S200, I've always used willtheyfit.com but that one doesn't get on with imperial sized 4x4 tyres.

205/75r15 General Grabber AT3s, 40mm spacer lift, 15x6 ET5 steel modulars, Ignis Recaros, Green Stuff pads, Osram Nightbreaker bulbs

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27 Jun 2019 20:13 #210386 by S200KYS
Replied by S200KYS on topic True reading of oddometer
Happy to help...

Old skool calculator

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30 Jun 2019 15:41 #210459 by ianm
Replied by ianm on topic True reading of oddometer
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?

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