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Old 29th September 2006, 11:00   #1
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Default Help: one rupee tyre test and tyre sizes

Driver's side tyre in my S10 has developed a 'bulb' and needs to be replaced ASAP. I am confused about the one rupee tire test. Coin on the right rear shows rupee clearly but 1998 below the rupee can't be seen fully. Rest of the tyres, the 'rupee' and 1998 below it are clearly seen. How do I intepret the results? If rest of the tyres are okay, I plan to change only the driver's tyre else the Palio will get new footwear.

Stock tyres are Bridgestone S322 175/65 R14's. Haven't been very satisfied with bridgestones on both the Matiz and now the Palio. I want the tyres to be low on noise. What is the correct upsize from stocks? I was thinking of going in for Michellin's, if I have to buy new tyres. I just want to go one size up. Thanks in advance.

Last edited by amit : 29th September 2006 at 11:03.
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Old 29th September 2006, 17:04   #2
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Amit can't really comment on the rupee test without pictures of some sort for reference.

As for the upsize you can consider 185/60 R14 & 195/60 R14 both will suit your car well. For tyres I would recommend Michelin Energy XM1 (more comfort biased), Potenza GIII (Sporty tyre) or Tranza ER60 (again comfort tyre). I'm running Michelin's and find them better than both Goodyear Eagle F1 & Bridgestone S322 which I was running earlier.
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Old 29th September 2006, 17:20   #3
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Quote:
Originally Posted by amit
Stock tyres are Bridgestone S322 175/65 R14's. Haven't been very satisfied with bridgestones on both the Matiz and now the Palio. I want the tyres to be low on noise. What is the correct upsize from stocks? I was thinking of going in for Michellin's, if I have to buy new tyres. I just want to go one size up. Thanks in advance.
Use online tyre size calculator
http://www.miata.net/garage/tirecalc.html
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Old 30th September 2006, 12:12   #4
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If the suspension geometry of S10 is similar to the regular palio (that came with 165/80R13 tyres) then you can also upsize to 185/65R14 tyres... I particularly like the Goodyear Eagle NCT5 tubelless in this size and have been using them for sometime (22k kms) now
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Old 6th October 2006, 15:56   #5
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Thanks for the help guys. The S10 got 4 new tyres. I went in for Michelin Energy XM1 tubeless in size 185/60 R14. It's my first time using Michelins and have been very impressed with them so far. The tyres are very quiet which was just what I wanted from them.
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Old 6th October 2006, 16:42   #6
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Quote:
Originally Posted by amit
... I am confused about the one rupee tire test. Coin on the right rear shows rupee clearly but 1998 below the rupee can't be seen fully. Rest of the tyres, the 'rupee' and 1998 below it are clearly seen. How do I intepret the results?....
I am all at sea. What on earth is this rupee test? Where do you find the coin? Or is it a figure of speech? Somebody please explain.
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Old 6th October 2006, 16:49   #7
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Add me also to the list of people who are confused as to what a rupee coin has to do with tyre replacing ?
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Old 18th October 2006, 01:29   #8
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Just to measure the tread depth ...since most of us dont carry vernier callipres around ...

BTW...a tread depth of <2mm is liiegal..did you know that...bet most of the cops dont know either
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Old 18th October 2006, 01:36   #9
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I'm lost too, amit, will you please explain to us what is the "rupee" test?
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Old 18th October 2006, 10:12   #10
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Quote:
Originally Posted by Buffetfan
BTW...a tread depth of <2mm is liiegal..did you know that...
Hmmm. Did not know that. Could you shed more light on how to use the coin to measure the tread ?

Many years ago, me and a couple of friends did a Kerala-Chennai overnight drive on our M800 with all four tyres having almost zero tread. To top it, we had only one working headlight (luckily the driver side one). Can't even imagine doing something like that today.
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Old 18th October 2006, 11:24   #11
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Quote:
Originally Posted by Sam Kapasi
I'm lost too, amit, will you please explain to us what is the "rupee" test?
Hi Guys,

It is a simple way to deduce tread life and uneven tyre wear in the absence of a vernier or a tread depth guage. You need to make sure that all treads are worn out evenly to ensure long life of the tyre.

"It is important to know how to check your tyre and take good care of it. The law states that tread depth should be a minimum of 1.6 mm.You may never be fined for breaking this law but it can be unsafe. Check your tyre for wear at your nearest tyre shop using a tread depth gauge which is the most accurate way to measure. An easy way to check is by using the `rupee trick.' Place a rupee coin upside down in the tread and if the Hindi lettering on the rupee disappears in the tread its fine. But if its visible its time to change. Easy isn't it."

Source The Hindu Dec9, 2002.

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Old 18th October 2006, 12:55   #12
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Oh! So simple, and I was trying thinking in Hebrew.
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Old 18th October 2006, 13:28   #13
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You know, I can't believe how simple that answer was viper,

I was thinking of that stupid stallone movie, Driven, where he throws some coins on the track and picks them up with his tyres.
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Old 21st October 2006, 15:02   #14
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S322 is a stock tyre, Suggest you look at Potenza G3 Series Tubeless, or Potenza series..I've had Stock Potenza on my SFX lancer and they were amazing...and the replacement is even better
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Old 22nd October 2006, 08:18   #15
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Cmon guys, most tyres these days come with a tyre wear indicator (embedded in the tread). When the tyre wears down to the that level, it's time to replace.

The S322s' have it as well.

Shan2nu

Last edited by Shan2nu : 22nd October 2006 at 08:20.
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