ZUKIWORLD Online | Suzuki 4x4 Editorial and Forum

ZUKIWORLD Discussion Forum => Suzuki 4x4 Forum => Topic started by: homer74 on July 09, 2007, 08:13:04 PM

Title: Speedo difference w/bigger tires?
Post by: homer74 on July 09, 2007, 08:13:04 PM

How much would my speedo be off by with big ole 30's on it? was running puny stock wheels?

Title: Re: Speedo difference w/bigger tires?
Post by: museboy07 on July 09, 2007, 08:26:13 PM

i got 29s on mine and speedo says 50 when im goin bout 54-55

Title: Re: Speedo difference w/bigger tires?
Post by: homer74 on July 09, 2007, 08:27:27 PM

Thanks i kinda thought that but wasnt sure.

Title: Re: Speedo difference w/bigger tires?
Post by: 450rydr on July 09, 2007, 08:28:50 PM

Yeah, mine's off 10%, so 30=33mph, 40=44mph, 50=55mph

Title: Re: Speedo difference w/bigger tires?
Post by: BigRedZuki on July 09, 2007, 08:41:20 PM

use a gear calculator

www.izook.com/gearcalc.htm (http://www.izook.com/gearcalc.htm)

Title: Re: Speedo difference w/bigger tires?
Post by: olija on July 09, 2007, 09:44:06 PM

The formula is simple

Current tire size (29") / stock tire size (26") x speedometer reading

That is how far it is off

Title: Re: Speedo difference w/bigger tires?
Post by: Rhinoman on July 10, 2007, 11:18:15 AM

If you have a GPS then you can recalibrate the speedo. This was covered on, IIRC, Zuwharrie recently and (again IIRC) is reproduced in ACK's FAQ.

Title: Re: Speedo difference w/bigger tires?
Post by: muskegtracker on July 11, 2007, 12:20:30 PM

I concur with 10% decrease in speed and odometer reading.

Title: Re: Speedo difference w/bigger tires?
Post by: john1974 on July 12, 2007, 10:19:25 AM

3 speed auto + 5.12 gears + 31x10.5s = speedo dead on ;)

nice to have a speedo be back on after years of samurais, and other stuff being off.