Oversize Tire Speedo Differential

[rowhard]

So you are saying that I have traveled farther than my odometer is reading? Damn, I was trying to cheer myself up since I turned 70K this week, now it looks like I was 70K last year.....

yep, 2 inches every rpm of the tire, and if I did the math right, that would be 1 mile every 31680 rpm's.

sorry

P.S. I didn't take my shoes off when I figured that, so it could be off by who knows how much

[nfpgasmask]

Yup, I haven't done the calculations, but yeah, that's how it works. I guess I actually change my oil every 3500 or so, and not 3000. I still go by the ODO though.

With my tires my speed is 7% off, calculated by using a GPS. I set my Scangauge to reflect the difference and now all is good.

Bart

[snowtrooper1966]

So how could I calculate how far my ODO is off if I have had these tires on for say, 10K miles?
Best,

[rowhard]

So how could I calculate how far my ODO is off if I have had these tires on for say, 10K miles?
Best,

I'll get back to you, need to take my shoes off to figure that one

[rowhard]

I'll get back to you, need to take my shoes off to figure that one

got it, trying to explain it to me girlfriend who, bless her heart isn't into math, the answer popped into my head. it's 10k times .06 plus 10k SOOOOOOOOOOO

10000 x .06 = 600 + 10000 = 10600. So it was proable 3 weeks ago when you cracked 70k

Now I'm really sorry snowtrooper

[Gussie2000]

got it, trying to explain it to me girlfriend who, bless her heart isn't into math, the answer popped into my head. it's 10k times .06 plus 10k SOOOOOOOOOOO

10000 x .06 = 600 + 10000 = 10600. So it was proable 3 weeks ago when you cracked 70k

Now I'm really sorry snowtrooper

Wow that's sad though !

I replaced the stock shoes for 20x9 rims,the tyres are 275/45R20 which means my speedo are somehow outter the speedo angle

[rowhard]

Wow that's sad though !

I replaced the stock shoes for 20x9 rims,the tyres are 275/45R20 which means my speedo are somehow outter the speedo angle

would you believe there is only 1/10 of a inch difference between those rubber bands you call tires and the OEM tire:bgwg: