[Miata] 195/60s vs 195/50s

[Bryan Wyatt]

You mean 185-60-14, right?  195-55-14 is the same diameter as stock, just wider.
   
  -Bryan
  
Larry Alster <Larry at Miata.net> wrote:
  The normal 14" size would be 195/55/14.


Larry

White Knight 1991 Crystal White #99 CSP
Silver Bullet 1992 Silverstone #17 SM2 FM I+ Turbo
Honey B 1992 Sunburst Yellow
Whooosh 2004 Titanium Mazdaspeed MX-5

LowCountry Miata http://www.lowcountrymiataclub.net
Masters Miata
RAGS 074
----- Original Message ----- 
From: "the.jack" 
To: "'Miata List'" 
Sent: Tuesday, February 20, 2007 2:13 PM
Subject: Re: [Miata] 195/60s vs 195/50s


>> -----Original Message-----
>> From: glen mccready [mailto:gkm+miata at petting-zoo.net]
>> Subject: Re: [Miata] 195/60s vs 195/50s
>>
>> Specification Sidewall Radius Diameter Circumference
>> Revs/Mile Difference
>> 195/60-14 4.6in 11.6in 23.2in 72.9in 869 
>> 0.0%
>> 195/50-15 3.8in 11.3in 22.7in 71.2in 
>> 889 -2.3%
>>
>> So, the 15in setup will give you slightly lower gearing, the
>> gearing may help acceleration, but that assumes you keep the
>> unsprung weight comparable (ie. buy wheels that weigh the
>> same or less than your 14s). The 15in setup also has
>> significantly less sidewall which should help turn-in
>> response, but also means you're effectively losing some
>> spring rate from the tire so if you think the ride is harsh
>> now, stick with the 14s for more sidewall. And it gets more
>> interesting when you consider what rim width you're going to
>> stretch the 195mm patch over, so that's a whole other story...
>>
>> Clear as mud?
>>
>> glen
> -----Response-----
>
> I knew about the .8" difference in sidewall (thus less spring), I just 
> realized that I'm not sure of the stock 5-spoke 14s
> width... I was thinking 6", but they might be 5.5... The 15s would almost 
> definitely be 6.5, and the weight might actually go down:
> considering Heliums and (as I mentioned) Hankooks which would be (ignoring 
> tolerances and balance weights) 29.4#, versus 31# with
> the 14" Hankooks and the 12.5# stock rims (also, as you mention, they are 
> a touch taller, so that weight is through a larger
> radius...)... In anycase I'm considering the weight difference close 
> enough not stay up all night worrying.
> Also, FWIW, I have 195/60s (Ziex 512s) on there now and they "bulge" a bit 
> too much for me, so in that respect the 195/50s
> on wider rims would "sit better" on the rim (to me).
> I guess I'm looking for a "subjective" comment on the differences. I like 
> my steering response and the ride isn't too
> important to me (still on stock suspension) as my Miata is basically a DD 
> for me, most long trips or anything with "cargo"
> (shopping, visiting, etc) are done in the SAAB, so I can skimp on the 
> "luxury" aspects of my car :) But if I'm not actually going to
> gain a lot of control or handling from the 15s then I'd like to add a 
> sweet sounding exhaust over a new wheel/tire set.
> I think I mixed the muddy water up a bit :/
>
> Chris C.
> 99 Mazda Miata 5-sp Emerald
>
>
> _______________________________________________
> Miata mailing list
> Miata at list.realbig.com
> http://list.realbig.com/mailman/listinfo/miata
> 

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