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#1
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Tires for a '90 Miata
It's time to replace the Kumhos on my '90 Miata. My thinking is to go up
one size (from 185/60R14 to 195/60R14), to compensate for the slightly too-slow speedometer, and buy a set of four Sumitomo HTR A/S P01. My questions: 1. Any wise comments on the increased size? 2. Any wise comments on the Sumitomos, or recommendations for a better tire choice? I'm looking for a comfortable ride and good thread-ware in an all-season (including light snow) tire, not performance. -- Arye. |
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#2
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Tires for a '90 Miata
"Arye" > wrote in message ... > It's time to replace the Kumhos on my '90 Miata. My thinking is to go up > one size (from 185/60R14 to 195/60R14), to compensate for the slightly > too-slow speedometer, and buy a set of four Sumitomo HTR A/S P01. > > My questions: > > 1. Any wise comments on the increased size? > > 2. Any wise comments on the Sumitomos, or recommendations for a better > tire choice? I'm looking for a comfortable ride and good thread-ware in an > all-season (including light snow) tire, not performance. > > -- Arye. Some manufacturers make a P195/55 r14. I'm thinking that the 55 series might be a closer match to the original circumference but I couldn't say for sure. Chris 99BBB |
#3
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Tires for a '90 Miata
In article >,
"Chris D'Agnolo" > wrote: > Some manufacturers make a P195/55 r14. I'm thinking that the 55 series might > be a closer match to the original circumference but I couldn't say for sure. 195/55-14 is a bit smaller diameter, and will make the speedometer error worse. OTOH, if you fix the speedo via larger tires, you'll throw off the odometer, which must be accurate with stock tires by law, for warranty reasons. Personally, I don't really care about any of that. I calculate the speedo error with mileposts and a stopwatch, and pay little attention to the odo. Actually, with 205/50-15 my speedo is almost perfect. But every Miata is a little different. -- Lanny Chambers St. Louis, MO '94C |
#4
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Tires for a '90 Miata
On Sep 9, 8:50*pm, Arye > wrote:
> It's time to replace the Kumhos on my '90 Miata. My thinking is to go up > one size (from 185/60R14 to 195/60R14), to compensate for the slightly > too-slow speedometer, and buy a set of four Sumitomo HTR A/S P01. > > My questions: > > 1. *Any wise comments on the increased size? > > 2. *Any wise comments on the Sumitomos, or recommendations for a better > tire choice? I'm looking for a comfortable ride and good thread-ware in > an all-season (including light snow) tire, not performance. > > -- Arye. not exactly what you are asking but if you are in the northern hemishere, it is getting to be winter, get some nokian hakka's. the differnece is amazing in the snow.ice. peter |
#5
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Tires for a '90 Miata
On 2010-09-09 20:50:12 -0400, Arye > said:
> My thinking is to go up one size (from 185/60R14 to 195/60R14), to > compensate for the slightly too-slow speedometer Is there a typo here? I'm no expert but my understanding is that 185 and 195 indicate the tread width in millimeters. In other words, you are getting a tire that is about 2/5 of an inch wider. This may provide slightly better grip in cornering, everything else being equal. (Tread pattern, compound hardness, tire pressure, slip angles...) But since they are both 60 profile I think the diameter will be exactly the same, hence the speedo/odo will not be affected. cheers Don |
#6
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Tires for a '90 Miata
On 9/15/2010 3:16 AM, Don Q wrote:
> On 2010-09-09 20:50:12 -0400, Arye > said: > >> My thinking is to go up one size (from 185/60R14 to 195/60R14), to >> compensate for the slightly too-slow speedometer > > Is there a typo here? > > I'm no expert but my understanding is that 185 and 195 indicate the > tread width in millimeters. In other words, you are getting a tire that > is about 2/5 of an inch wider. This may provide slightly better grip in > cornering, everything else being equal. (Tread pattern, compound > hardness, tire pressure, slip angles...) > > But since they are both 60 profile I think the diameter will be exactly > the same, hence the speedo/odo will not be affected. > > cheers > > Don > It's true that that 185 and 195 indicate the tread width. However, the 60 indicates the ratio of diameter to width, so it goes up proportionally. But there WAS a typo the I was looking for good thread-wear, not good thread-ware... Thanks! |
#7
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Tires for a '90 Miata
In article >, Don Q wrote:
> On 2010-09-09 20:50:12 -0400, Arye > said: > > > My thinking is to go up one size (from 185/60R14 to 195/60R14), to > > compensate for the slightly too-slow speedometer > > Is there a typo here? > > I'm no expert but my understanding is that 185 and 195 indicate the > tread width in millimeters. In other words, you are getting a tire that > is about 2/5 of an inch wider. This may provide slightly better grip in > cornering, everything else being equal. (Tread pattern, compound > hardness, tire pressure, slip angles...) > > But since they are both 60 profile I think the diameter will be exactly > the same, hence the speedo/odo will not be affected. Ummmm... ...no. The "60" indicates that the section height of the tire is 60% of the section width of the tire (the "185" or "195" in the size; which is not tread width, BTW), and both of these figures are nominal and not necessarily completely precise. So a 185/60R14 tire is (nominally!) 185mm wide at its widest point (the tread is narrower and (nominally!) 2 * (185 * .6)/25.4 + 14 = 22.74" tall. -- Alan Baker Vancouver, British Columbia <http://gallery.me.com/alangbaker/100008/DSCF0162/web.jpg> |
#8
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Tires for a '90 Miata
In article >,
Arye > wrote: > On 9/15/2010 3:16 AM, Don Q wrote: > > On 2010-09-09 20:50:12 -0400, Arye > said: > > > >> My thinking is to go up one size (from 185/60R14 to 195/60R14), to > >> compensate for the slightly too-slow speedometer > > > > Is there a typo here? > > > > I'm no expert but my understanding is that 185 and 195 indicate the > > tread width in millimeters. In other words, you are getting a tire that > > is about 2/5 of an inch wider. This may provide slightly better grip in > > cornering, everything else being equal. (Tread pattern, compound > > hardness, tire pressure, slip angles...) > > > > But since they are both 60 profile I think the diameter will be exactly > > the same, hence the speedo/odo will not be affected. > > > > cheers > > > > Don > > > It's true that that 185 and 195 indicate the tread width. However, the > 60 indicates the ratio of diameter to width, so it goes up proportionally. 1. 185 and 195 indicate the *section* width, no the tread width. 2. The 60 indicates the ratio of the section height to section width as a percentage > > But there WAS a typo the I was looking for good thread-wear, not good > thread-ware... > > Thanks! -- Alan Baker Vancouver, British Columbia <http://gallery.me.com/alangbaker/100008/DSCF0162/web.jpg> |
#9
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Tires for a '90 Miata
In article >,
Arye > wrote: > But there WAS a typo the I was looking for good thread-wear, not good > thread-ware... [...must...sit...on...hands...] -- Lanny Chambers St. Louis, MO '94C |
#10
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Tires for a '90 Miata
On Sep 15, 5:18*pm, Lanny Chambers > wrote:
> In article >, > > *Arye > wrote: > > But there WAS a typo the I was looking for good thread-wear, not good > > thread-ware... > > [...must...sit...on...hands...] I was just tinking te same ting.... |
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