Another dam tyre thread

[2007alaskanrubicon]

Originally Posted by drover

Now please correct me but,,,, a 245/65/17 to a 265/65/17 shouldn't have any effect on the speedo as only the tyre width has changed not the diameter.

Nope the 265 is taller.

The first number is the width you are correct. The second number is the percentage of the width

So for instance.

265/70/r17. Add the % sign to the second number 70%

265mm by 70%
265 x .70= 185.5mm
Now the 185.5mm is the height of the tyre on one side of the rim to the tread. There is where a lot of confusion sets in. There is a top and a bottom if you take a vertical slice of the tyre.

265/70/r17
265 x .70= 185.5 how tall the tyre is from wheel to tread
(185.5x 2)tyre top and bottom+ 17"rim

Converter. 185.5x2= 371mm

371mm = 14.60 inches
14.60" tyre + 17"rim = 31.60" total tyre and rim. Hope this helps.






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[drover]

Well written, someone already pointed that out to me, one of those " I knew that " moments, I just blame it on age. Lol

[Numb Thumbs]

Tyre size calculators make the job easier.

I use this one:

http://www.miata.net/garage/tirecalc.html

Cheers
Numb Thumbs

[2007alaskanrubicon]

Got my new treads today. 265/70/R17 hankook dynapro MT RT03. Great tyre so far. No road noise at all quieter than my ol yokahama ats tyres. .






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[grand_wj]

Originally Posted by 2007alaskanrubicon

Got my new treads today. 265/70/R17 hankook dynapro MT RT03. Great tyre so far. No road noise at all quieter than my ol yokahama ats tyres.

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They look good, mind me asking what you paid?
Keep us up to date on how they wear, from what I've heard they rate better than the bfg km2 and mtz..

[2007alaskanrubicon]

Originally Posted by grand_wj

They look good, mind me asking what you paid?
Keep us up to date on how they wear, from what I've heard they rate better than the bfg km2 and mtz..

$1600 for the five mounted and balanced at Avanti tyre in Rockingham. So far they're great. The guys there were great and beat the best price I found. The only time the hum is when I'm sittin on 100kph. Barely noticeable withe the radio off. Once I'm on 110kph they're totally silent. I swear they're at's.






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[Hanna]

Originally Posted by 2007alaskanrubicon

$1600 for the five mounted and balanced at Avanti tyre in Rockingham. So far they're great. The guys there were great and beat the best price I found. The only time the hum is when I'm sittin on 100kph. Barely noticeable withe the radio off. Once I'm on 110kph they're totally silent. I swear they're at's.

They look great mate - nice one!

Just be a little cautiously optimistic of the lack of noise whilst they are new - my Goodyear Wrangler Duratracs were completely silent when new, but after about 15,000km they developed a nice little hum, mostly at lower speeds. At 100-110km/h they are still pretty good though. Still, it's not as bad as I thought they could be and not as bad as the BFG A/T's that I replaced.