90 Spirit Tire size
Any opinions on 90 Spirit tire size change from 185/70R14 to 195/60R15? Is
it worth the cost of new wheels? |
On Sat, 22 May 2004 03:45:54 +0000, Andrew Perlow wrote:
> Any opinions on 90 Spirit tire size change from 185/70R14 to 195/60R15? Is > it worth the cost of new wheels? No, not worth the cost. What do you expect to gain from it? -- If you're not on the edge, you're taking up too much space. Linux Registered User #327951 |
On Sat, 22 May 2004 03:45:54 +0000, Andrew Perlow wrote:
> Any opinions on 90 Spirit tire size change from 185/70R14 to 195/60R15? Is > it worth the cost of new wheels? No, not worth the cost. What do you expect to gain from it? -- If you're not on the edge, you're taking up too much space. Linux Registered User #327951 |
On Fri, 21 May 2004 23:45:54 -0400, Andrew Perlow wrote:
> Any opinions on 90 Spirit tire size change from 185/70R14 to 195/60R15? > Is it worth the cost of new wheels? I'm with Dan. It's probably not worth it. At best, I would expect maybe a slight drop in fuel use at highway speed *IF* the overall diameter of the tire rubber is larger. But if my math is correct, they're not. IIRC, the first number is tire width in millimeters, the second the percentage of that number that the sidewall measures, and the third being the rim diameter in inches (or the diameter of the inside hole of the tire, effectively the same thing). 185 * .70 ~ 130mm. 130 / 25.4 ~ 5.1 inch sidewall. times 2 (one for each side - make a diameter instead of radius), is 10.2, plus 14 for the rim diameter is 24.2 inches overall diameter. 195 * .60 = 117mm. 117 / 25.4 ~ 4.6 inch sidewall. Times 2, 9.2. Add 15, is 24.2 inches overall diameter. Hmmm. Seems to me you would have no gain whatsoever beyond simple cosmetics. You tell us. Is it worth it? FWIW, I have 205/60R15s I think. That makes them 24.7 inch overall diameter, so there's not much difference there, either. OTOH, you have to consider handling as well. You will have a different contact patch which may be larger or smaller depending on the weight your vehicle places on them. If you have a lighter vehicle, you'll want narrower tires. Heavier, wider. Otherwise, you wind up with a car that's so light it doesn't flatten the tire to the road for a proper patch, or so heavy it wears out the tires too quickly. In addition, the sidewall affects cornering ability, as it's a flexible piece of the suspension. I might consider changing all that for racing, but not for street driving. Even doing 70 mph up a 35 mph 270-degree circular onramp to an interstate highway like I sometimes do won't bring you anything that you'll notice much change in. Shouldn't be going that fast anyway, I know. Overall, if you don't race your car professionally or at least in some form of amateur circuit, don't spend money on rims. If you're going purely for cosmetics, consider the junkyards. Seriously. I purchased two rims from two yards. Both snowflake. Each rim got a fresh tire and replaced the donut spares in my car and my friend's car. One cost $20, the other $7 (yards vary, shop around). So now, for $27 and the cost of 2 new cheapo tires, I wound up with 2 perfectly good full size spares. 205/60R15. Assuming $20 for each rim and $40 (guessing) for each tire, you're looking at $240 to replace all four, $300 if you include a spare. You'll be lucky to get new rims alone for that price around my area. YMMV. Hope this has helped somehow. I know it's rather long (my trademark) but hopefully it answers your previous questions and helps answer future ones. Good luck CJ |
On Fri, 21 May 2004 23:45:54 -0400, Andrew Perlow wrote:
> Any opinions on 90 Spirit tire size change from 185/70R14 to 195/60R15? > Is it worth the cost of new wheels? I'm with Dan. It's probably not worth it. At best, I would expect maybe a slight drop in fuel use at highway speed *IF* the overall diameter of the tire rubber is larger. But if my math is correct, they're not. IIRC, the first number is tire width in millimeters, the second the percentage of that number that the sidewall measures, and the third being the rim diameter in inches (or the diameter of the inside hole of the tire, effectively the same thing). 185 * .70 ~ 130mm. 130 / 25.4 ~ 5.1 inch sidewall. times 2 (one for each side - make a diameter instead of radius), is 10.2, plus 14 for the rim diameter is 24.2 inches overall diameter. 195 * .60 = 117mm. 117 / 25.4 ~ 4.6 inch sidewall. Times 2, 9.2. Add 15, is 24.2 inches overall diameter. Hmmm. Seems to me you would have no gain whatsoever beyond simple cosmetics. You tell us. Is it worth it? FWIW, I have 205/60R15s I think. That makes them 24.7 inch overall diameter, so there's not much difference there, either. OTOH, you have to consider handling as well. You will have a different contact patch which may be larger or smaller depending on the weight your vehicle places on them. If you have a lighter vehicle, you'll want narrower tires. Heavier, wider. Otherwise, you wind up with a car that's so light it doesn't flatten the tire to the road for a proper patch, or so heavy it wears out the tires too quickly. In addition, the sidewall affects cornering ability, as it's a flexible piece of the suspension. I might consider changing all that for racing, but not for street driving. Even doing 70 mph up a 35 mph 270-degree circular onramp to an interstate highway like I sometimes do won't bring you anything that you'll notice much change in. Shouldn't be going that fast anyway, I know. Overall, if you don't race your car professionally or at least in some form of amateur circuit, don't spend money on rims. If you're going purely for cosmetics, consider the junkyards. Seriously. I purchased two rims from two yards. Both snowflake. Each rim got a fresh tire and replaced the donut spares in my car and my friend's car. One cost $20, the other $7 (yards vary, shop around). So now, for $27 and the cost of 2 new cheapo tires, I wound up with 2 perfectly good full size spares. 205/60R15. Assuming $20 for each rim and $40 (guessing) for each tire, you're looking at $240 to replace all four, $300 if you include a spare. You'll be lucky to get new rims alone for that price around my area. YMMV. Hope this has helped somehow. I know it's rather long (my trademark) but hopefully it answers your previous questions and helps answer future ones. Good luck CJ |
Not too long, very good, great infact - thanks. Will keep same size.
"Circuit Breaker" > wrote in message . com... > On Fri, 21 May 2004 23:45:54 -0400, Andrew Perlow wrote: > > > Any opinions on 90 Spirit tire size change from 185/70R14 to 195/60R15? > > Is it worth the cost of new wheels? > > I'm with Dan. It's probably not worth it. > > At best, I would expect maybe a slight drop in fuel use at highway speed > *IF* the overall diameter of the tire rubber is larger. But if my math > is correct, they're not. > > IIRC, the first number is tire width in millimeters, the second the > percentage of that number that the sidewall measures, and the third > being the rim diameter in inches (or the diameter of the inside hole of > the tire, effectively the same thing). > > 185 * .70 ~ 130mm. 130 / 25.4 ~ 5.1 inch sidewall. times 2 (one for each > side - make a diameter instead of radius), is 10.2, plus 14 for the rim > diameter is 24.2 inches overall diameter. > > 195 * .60 = 117mm. 117 / 25.4 ~ 4.6 inch sidewall. Times 2, 9.2. Add > 15, is 24.2 inches overall diameter. > > Hmmm. Seems to me you would have no gain whatsoever beyond simple > cosmetics. You tell us. Is it worth it? > > FWIW, I have 205/60R15s I think. That makes them 24.7 inch overall > diameter, so there's not much difference there, either. > > OTOH, you have to consider handling as well. You will have a different > contact patch which may be larger or smaller depending on the weight your > vehicle places on them. If you have a lighter vehicle, you'll want > narrower tires. Heavier, wider. Otherwise, you wind up with a car > that's so light it doesn't flatten the tire to the road for a proper > patch, or so heavy it wears out the tires too quickly. In addition, the > sidewall affects cornering ability, as it's a flexible piece of the > suspension. I might consider changing all that for racing, but not for > street driving. Even doing 70 mph up a 35 mph 270-degree circular onramp > to an interstate highway like I sometimes do won't bring you anything > that you'll notice much change in. Shouldn't be going that fast anyway, > I know. > > Overall, if you don't race your car professionally or at least in some > form of amateur circuit, don't spend money on rims. If you're going > purely for cosmetics, consider the junkyards. Seriously. I purchased > two rims from two yards. Both snowflake. Each rim got a fresh tire and > replaced the donut spares in my car and my friend's car. One cost $20, > the other $7 (yards vary, shop around). So now, for $27 and the cost of > 2 new cheapo tires, I wound up with 2 perfectly good full size spares. > 205/60R15. Assuming $20 for each rim and $40 (guessing) for each tire, > you're looking at $240 to replace all four, $300 if you include a spare. > You'll be lucky to get new rims alone for that price around my area. > YMMV. > > Hope this has helped somehow. I know it's rather long (my trademark) but > hopefully it answers your previous questions and helps answer future > ones. > > Good luck > > CJ |
Not too long, very good, great infact - thanks. Will keep same size.
"Circuit Breaker" > wrote in message . com... > On Fri, 21 May 2004 23:45:54 -0400, Andrew Perlow wrote: > > > Any opinions on 90 Spirit tire size change from 185/70R14 to 195/60R15? > > Is it worth the cost of new wheels? > > I'm with Dan. It's probably not worth it. > > At best, I would expect maybe a slight drop in fuel use at highway speed > *IF* the overall diameter of the tire rubber is larger. But if my math > is correct, they're not. > > IIRC, the first number is tire width in millimeters, the second the > percentage of that number that the sidewall measures, and the third > being the rim diameter in inches (or the diameter of the inside hole of > the tire, effectively the same thing). > > 185 * .70 ~ 130mm. 130 / 25.4 ~ 5.1 inch sidewall. times 2 (one for each > side - make a diameter instead of radius), is 10.2, plus 14 for the rim > diameter is 24.2 inches overall diameter. > > 195 * .60 = 117mm. 117 / 25.4 ~ 4.6 inch sidewall. Times 2, 9.2. Add > 15, is 24.2 inches overall diameter. > > Hmmm. Seems to me you would have no gain whatsoever beyond simple > cosmetics. You tell us. Is it worth it? > > FWIW, I have 205/60R15s I think. That makes them 24.7 inch overall > diameter, so there's not much difference there, either. > > OTOH, you have to consider handling as well. You will have a different > contact patch which may be larger or smaller depending on the weight your > vehicle places on them. If you have a lighter vehicle, you'll want > narrower tires. Heavier, wider. Otherwise, you wind up with a car > that's so light it doesn't flatten the tire to the road for a proper > patch, or so heavy it wears out the tires too quickly. In addition, the > sidewall affects cornering ability, as it's a flexible piece of the > suspension. I might consider changing all that for racing, but not for > street driving. Even doing 70 mph up a 35 mph 270-degree circular onramp > to an interstate highway like I sometimes do won't bring you anything > that you'll notice much change in. Shouldn't be going that fast anyway, > I know. > > Overall, if you don't race your car professionally or at least in some > form of amateur circuit, don't spend money on rims. If you're going > purely for cosmetics, consider the junkyards. Seriously. I purchased > two rims from two yards. Both snowflake. Each rim got a fresh tire and > replaced the donut spares in my car and my friend's car. One cost $20, > the other $7 (yards vary, shop around). So now, for $27 and the cost of > 2 new cheapo tires, I wound up with 2 perfectly good full size spares. > 205/60R15. Assuming $20 for each rim and $40 (guessing) for each tire, > you're looking at $240 to replace all four, $300 if you include a spare. > You'll be lucky to get new rims alone for that price around my area. > YMMV. > > Hope this has helped somehow. I know it's rather long (my trademark) but > hopefully it answers your previous questions and helps answer future > ones. > > Good luck > > CJ |
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