245/60/15s

[the wrath]

how much will these tires throw off the speedometer than the 235/60/15s and how rough do they ride

 

[NEWCHAPTER]

http://www.miata.net/garage/tirecalc.htmlhttp://www.miata.net/garage/tirecalc.html
try here

 

[UNGN]

you really need to look at the MFG's specs as no two 245/60R15 are the same size. some are 27.4" tall while others are 26.3".

Speedo error could be 1.5 mph at 60 mph up to maybe 4 mph at 60 mph.

They won't ride rougher than 235/60's but the you may feel more of the road through the steering.

I used dunlop 245/60's on T-type wheels and the handling was prety good. Aftermarket springs kept the tires off the fenderwells in front.

 

[Ram]

Isn't that like saying no two 12" rulers are the same length????
They may be off by a tenth of a inch but not by almost a inch.
I have 255/60's on the rear & they are 27.0" tall & 235/60's
on the front & they are 26.10" Both are Goodyear.
Goodrich 255/60's are 27.10" & 235/60's are 26.10"
Goodrich 245/60's are 26.6" Goodyear dosen't make that size in a 15".
A 245/60 is a 245/60 no matter who makes it.

RAM

 

[UNGN]

Originally posted by Ram
Isn't that like saying no two 12" rulers are the same length????
They may be off by a tenth of a inch but not by almost a inch.
I have 255/60's on the rear & they are 27.0" tall & 235/60's
on the front & they are 26.10" Both are Goodyear.
Goodrich 255/60's are 27.10" & 235/60's are 26.10"
Goodrich 245/60's are 26.6" Goodyear dosen't make that size in a 15".
A 245/60 is a 245/60 no matter who makes it.

RAM

Nitto 275/50 are 25.6 new and closer to 25.3 when worn.

BFG 275/50's start at 26.1 and won't get smaller than 25.9.

Tires size isn't mandated by the government and the height, width, etc. vary by manufacturer.

That's why learning a formula that calculates tire height is just about worthless for determining the actual tire height.