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Old 11th April 2017, 09:17   #751
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Default Re: Upgrading wheels/tyres on Santro

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Originally Posted by rajivtelang View Post
What year model your Santro is? Did they fit perfectly on stock rims?
I too am looking for same tyres for my Santro, 2013 Model. What I understood from Tyre Empire shop in HSR that Santro's rims cannot take any size beyond 155/70 R13. Anything bigger needs the rims to be changed.
165/65 R13 is the perfect upgrade for santro xing on the existing stock rims. I own a santro xing on which the current tyre spec is 165/65 R13. I changed these tyres in Jan 2014.
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Old 11th April 2017, 10:32   #752
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Originally Posted by rajivtelang View Post
What year model your Santro is? Did they fit perfectly on stock rims?
I too am looking for same tyres for my Santro, 2013 Model. What I understood from Tyre Empire shop in HSR that Santro's rims cannot take any size beyond 155/70 R13. Anything bigger needs the rims to be changed.
Mine is 2005 model, these are the third set of tyres. 165/65's fit perfectly on the Santro OEM wheels. Maybe your dealer was trying to coax you into buying a new set of wheels as well, probably alloys!

Quoting another BHPian who fit 170/70's on the stock wheels and is happy with them.

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Originally Posted by mayankk View Post
Got the gt3 175/70 for the Santro finally.
They fit in the stock rim just fine.
Thanks guys.

Last edited by Geo_Ipe : 11th April 2017 at 10:33.
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Old 12th April 2017, 18:31   #753
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Default Re: Upgrading wheels/tyres on Santro

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Originally Posted by Geo_Ipe View Post

Quoting another BHPian who fit 170/70's on the stock wheels and is happy with them.
175/70 R13 will be an overkill I suppose. It will increase the GC too much and surely well beyond 3% of standard size. I will go for 165/65 R13 since it will surely be great. Does this affect the FE by any chance due to increased width? Santro gives some 13-14 in City and around 17-18 on highways with stock sized tyres.
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Old 13th April 2017, 10:22   #754
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Originally Posted by rajivtelang View Post
175/70 R13 will be an overkill I suppose. It will increase the GC too much and surely well beyond 3% of standard size. I will go for 165/65 R13 since it will surely be great. Does this affect the FE by any chance due to increased width? Santro gives some 13-14 in City and around 17-18 on highways with stock sized tyres.
If you want 175 section rubber, the correct upsize would by 175/65 or 175/60 R14, for which you'll need new wheels.

I haven't calculated FE tankful to tankful, but I can confidently say that there's hasn't been a noticeable drop. Did a 1300 km round trip in December and managed 17+ kmpl on the highway.
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Old 23rd April 2017, 12:07   #755
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Default Re: Upgrading wheels/tyres on Santro

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Originally Posted by Geo_Ipe View Post
If you want 175 section rubber, the correct upsize would by 175/65 or 175/60 R14, for which you'll need new wheels.
With stock tyres gc is some 172mm as per specification of santro. I will go with 165/70 R13 which will increase gc by 7mm i.e. 179mm in total. I feel it might be slightly better for Bangalore roads.
Need to check price difference between stock 155/70 R13 and 165/70 R13 though.
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Old 23rd April 2017, 18:20   #756
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Default Re: Upgrading wheels/tyres on Santro

Quote:
Originally Posted by rajivtelang View Post
175/70 R13 will be an overkill I suppose. It will increase the GC too much and surely well beyond 3% of standard size. I will go for 165/65 R13 since it will surely be great. Does this affect the FE by any chance due to increased width? Santro gives some 13-14 in City and around 17-18 on highways with stock sized tyres.
Between 165/65 R13 and 155/70 R13, the outside diameter of the former is more by 2.5 mm compared to the latter. This is the best recommended tyre upgrade with the existing rim size
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Old 26th April 2017, 18:58   #757
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Default Re: Upgrading wheels/tyres on Santro

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Originally Posted by suresh_gs View Post
Between 165/65 R13 and 155/70 R13, the outside diameter of the former is more by 2.5 mm compared to the latter. This is the best recommended tyre upgrade with the existing rim size
With 165/65 R13 the size of sidewall is 165 * 0.65 = 107.25mm
Stock 155/70 R13 the size of sidewall is 155 * 0.77 = 108.5mm

So with 165/65 R13 the overall diameter will be less by 1.25 * 2 = 2.5mm.

This is not much with this upgrade. However if I choose to go for 165/70,

with 165/70 R13 the size of sidewall is 165 * 0.7 = 115.5mm which in turn increases the gc by 7mm and diameter by 14mm (7 * 2) compared to stock size.

Now my question is since the width remains the same between 165/65 or 165/70, a little more gc is always better for city like Bangalore.

Will that be a problem since Santro's gc is 172mm with stock size tyres. Anything little more is always better. What do you think?

Last edited by rajivtelang : 26th April 2017 at 19:01.
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Old 26th April 2017, 19:17   #758
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Originally Posted by rajivtelang View Post

...with 165/70 R13 the size of sidewall is 165 * 0.7 = 115.5mm which in turn increases the gc by 7mm and diameter by 14mm (7 * 2) compared to stock size...
Are 165/70 R13s freely available? I didn't find Michelin or Yokohama tyres in that size when I was shopping. Quick net search shows Apollo Amazers in that size on Snapdeal, but out of stock.

Last edited by Geo_Ipe : 26th April 2017 at 19:19.
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Old 27th April 2017, 09:44   #759
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Default Re: Upgrading wheels/tyres on Santro

Quote:
Originally Posted by rajivtelang View Post
With 165/65 R13 the size of sidewall is 165 * 0.65 = 107.25mm
Stock 155/70 R13 the size of sidewall is 155 * 0.77 = 108.5mm

So with 165/65 R13 the overall diameter will be less by 1.25 * 2 = 2.5mm.

This is not much with this upgrade. However if I choose to go for 165/70,

with 165/70 R13 the size of sidewall is 165 * 0.7 = 115.5mm which in turn increases the gc by 7mm and diameter by 14mm (7 * 2) compared to stock size.

Now my question is since the width remains the same between 165/65 or 165/70, a little more gc is always better for city like Bangalore.

Will that be a problem since Santro's gc is 172mm with stock size tyres. Anything little more is always better. What do you think?

Increase in ground clearance by 7 mm could impact the CG which in turn could impact the dynamics and stability of the vehicle. May be experts can throw more light on this matter.
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Old 27th April 2017, 11:40   #760
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Default Re: Upgrading wheels/tyres on Santro

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Increase in ground clearance by 7 mm could impact the CG which in turn could impact the dynamics and stability of the vehicle. May be experts can throw more light on this matter.
Possible. Not sure if this is a recommended size at all. Better to stick to either stock size or at the most 165/65 R13 as an upgrade.

Quote:
Originally Posted by Geo_Ipe View Post
Are 165/70 R13s freely available? I didn't find Michelin or Yokohama tyres in that size when I was shopping. Quick net search shows Apollo Amazers in that size on Snapdeal, but out of stock.
You are right. Searched michelin india site. No such tyres available in 13" size. I am OK to reduce the GC by 1.25mm but FE and driveablity really matters for me.
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Old 27th April 2017, 11:58   #761
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Default Re: Upgrading wheels/tyres on Santro

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Originally Posted by rajivtelang View Post
Possible. Not sure if this is a recommended size at all. Better to stick to either stock size or at the most 165/65 R13 as an upgrade.


You are right. Searched michelin india site. No such tyres available in 13" size. I am OK to reduce the GC by 1.25mm but FE and driveablity really matters for me.
The difference in tyre circumference between the existing tyre size and the new tyre size should be within +/- 3%

It is very much safe with 165/65 R13 but close to the border line for 165/70 R13.

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Old 29th April 2017, 20:26   #762
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Default Re: Upgrading wheels/tyres on Santro

I got all 5 trouble making stock goodyears on my 2013 Santro upgraded to Michelin 165/65 R13 at Tyre Empire, HSR layout on stock rims. I got the volves replaced, wheel alignment and balancing done and entire package was Rs. 21500/-. I still feel it a bit expensive since the amounts he quoted was a bit much for wheel weights, volves and alignment. The amount he charged per tyre was Rs. 3850/- after discount. And as I said earlier they do not buy back any old tyres making things a bit more expensive.
Coming to ride quality, it is bit improved, tyre noise has gone away, need to have one car service also soon to really feel the difference. 4 tyres here are from date 4716 and one is 3816, I hope one 9 week older tyre should not make much difference.
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