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Rear tire wear

:agree: While they're all speaking the same laguage, there's an awful lot of different dialects in there turning the numbers into the tires...
 
Okay, I dunno.
The stock Kenda I took off was 225/50R15

I ordered, received and ruined a BF Goodrich 225/50R15

A tire store sold me a Khumo 225/50R15
I measured it and it was identical to the Kenda.

The Kenda & Khumo seem to me to be exactly the same size.

This website that explains tire sizes seems to say that if the numbers are the same, then the physical dimensions have to be the same as they offer a calculator that displays the diameter & circumference of the tire based on the size.
http://www.car-videos.net/info/tirespecs.asp

So as senile as I probably am I think that, within reason, the physical tire size of height and width is the same between two tires of the same size regardless of manufacturer.

The end.

Are you sure?
 
Ops!

Your right, 225/50/15, I don't know why I had 205 on my mind? Anyway, same size usually means the same rolling diameter within maybe 1 or 2 times in a mile or so, insignificant anyway. Sorry about that!
 
The following is quoted from a Tire Rack article titled:

Matching Tires on Four-Wheel Drive and All-Wheel Drive Vehicles


Address: http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=18

"Tire diameter variations can be caused by accidentally using different sized tires, tires with different tread designs, tires made by different manufacturers, different inflation pressures or even tires worn to different tread depths".


"This makes maintaining the vehicle manufacturer's recommended tire inflation pressures and using "matched" tires on all wheel positions necessary procedures to reduce strain on the vehicle's driveline. Using "matched" tires means all four tires are the same brand, design and tread depth. Mixing tire brands, tread designs and tread depths may cause components in the vehicle's driveline to fail." (emphasis mine)

It's also my experience that most tire retailers/installers do not recommend mixing brands on the same axle of a 2wd car or pickup, at least not on the drive axle.

I quote this in support of my previous post stating there may be small differences in dimensions of tires from different manufacturers, even though labeled the same size. I'm not saying that these possible small differences have any significance regarding the rear tire of our Spyders. I don't believe they would. But I do think it may be good idea if using an automobile tire (as I am) to use the same size as the oem tire, although that's just an opinion and I know of no actual evidence to support it. I did it just in case a different labeled size might have an effect on the VSS, although I know there are posts on these forums stating a different size tire did not cause any such problem.

Mike
 
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Revs per mile

I think I have seen under specifications, revolutions per mile from manufacturers and they vary but by very little. A new tire wears and then increases it's revolutions so it may not be an issue but I would stick with OEM size because of the electronics in our Spyders for those choosing car tires.
 
The following is quoted from a Tire Rack article titled:

Matching Tires on Four-Wheel Drive and All-Wheel Drive Vehicles


Address: http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=18

"Tire diameter variations can be caused by accidentally using different sized tires, tires with different tread designs, tires made by different manufacturers, different inflation pressures or even tires worn to different tread depths".


"This makes maintaining the vehicle manufacturer's recommended tire inflation pressures and using "matched" tires on all wheel positions necessary procedures to reduce strain on the vehicle's driveline. Using "matched" tires means all four tires are the same brand, design and tread depth. Mixing tire brands, tread designs and tread depths may cause components in the vehicle's driveline to fail." (emphasis mine)

It's also my experience that most tire retailers/installers do not recommend mixing brands on the same axle of a 2wd car or pickup, at least not on the drive axle.

I quote this in support of my previous post stating there may be small differences in dimensions of tires from different manufacturers, even though labeled the same size. I'm not saying that these possible small differences have any significance regarding the rear tire of our Spyders. I don't believe they would. But I do think it may be good idea if using an automobile tire (as I am) to use the same size as the oem tire, although that's just an opinion and I know of no actual evidence to support it. I did it just in case a different labeled size might have an effect on the VSS, although I know there are posts on these forums stating a different size tire did not cause any such problem.

Mike

The reason that same size tires are recommended on 4x4 vehicles is to prevent wind-up inside the transmission.

Not a problem you will encounter on a Spyder
 
Replaced the rear at 14,000 and the fronts at 26,000.

We replaced the rear on the RT at 14,000 and the fronts at 22,000.

At -10,000, the RS still has a ways to go.

Seems the best way to reduce tire wear is to . . . . park it :yikes:

and that's certainly NOT an option, is it? :roflblack: :roflblack:
 
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