Go Back   Team-BHP > Under the Hood > Modifications & Accessories > Tyre & Alloy wheel Section


Reply
 
Thread Tools Search this Thread
Old 10th June 2009, 12:41   #211
Senior - BHPian
 
predatorwheelz's Avatar
 
Join Date: Feb 2009
Location: Delhi/Kolkata
Posts: 1,653
Thanked: 1,104 Times
Default

Quote:
Originally Posted by amit_mechengg View Post

Reasons for not upsizing:
1. Tried 13" alloys. with 2 heavy people and going at 45 degrees on speed breaker the wheel scraped. tried 2-3 models still they scrapped.

3. i believe that lowering the car handles well than increasing the height. so i dont believe the people who claim that the handling improved by increasing 1" i.e from 12" to 13" .
@Amit_mechengg,

A little clarification. When one upsizes from 12" to 13", the handling improves because the profile of the tyre decreases. Typically a 12" tyre on an Alto will have a 80 profile, while 13" will have 65 or 60 profile. The lower profile means thinner sidewalls, hence lower sidewall flex at high speeds. This is why the handling improves.

Lowering the car will obviously improve handling, due to lowering of the Centre of Gravity. But it will lead to other problems, like scraping on a speed breaker when loaded.

Also, I dont understand how a shift to 13" wheels led the car to scrape a speedbreaker. What profile were you trying out?

@Thelord - You're welcome for taking my suggestion! (I'm shameless)
predatorwheelz is offline   Reply With Quote
Old 10th June 2009, 12:58   #212
BHPian
 
breezydrive's Avatar
 
Join Date: Aug 2007
Location: NOIDA
Posts: 709
Thanked: 68 Times
Default

Quote:
Originally Posted by amit_mechengg View Post
deciding against the upsize went for michelins 155/65 R12

so i dont believe the people who claim that the handling improved by increasing 1" i.e from 12" to 13" .
You have actually downsized your wheels

Tyre profile -- Wheel diameter (mm)

145/80R12 ( stock Alto) -- 536.8

155/65R13 ( preferred upgrade) -- 531.7

155/65R12 ( opted by you) -- 506.3

145/70R12 ( stock M-800) -- 507.8

So, your upgrade is even lesser in size than Maruti 800's stock size.
A gross error of 5.4%, be ready for suspension related problems after 5-10K km.

Now, people claiming improvement in handing by increasing the rim size compensate it by reducing the side profile for retaining the same overall diameter ( max. 2-3% variation).

So, it is upto you whether you believe it or not?

Last edited by breezydrive : 10th June 2009 at 13:06.
breezydrive is offline   Reply With Quote
Old 10th June 2009, 13:06   #213
Distinguished - BHPian
 
Technocrat's Avatar
 
Join Date: Feb 2004
Location: Mid West
Posts: 14,900
Thanked: 2,492 Times
Default

How are you calculating the wheel Dia?

12 inch = 304.8 millimeter

145/80 = 80% of 145 = 116mm

Am I missing something?
Technocrat is offline   Reply With Quote
Old 10th June 2009, 15:06   #214
Senior - BHPian
 
amit_mechengg's Avatar
 
Join Date: Dec 2007
Location: Pune
Posts: 2,412
Thanked: 1,542 Times
Default

Quote:
Originally Posted by predatorwheelz View Post
@Amit_mechengg,
A little clarification. When one upsizes from 12" to 13", the handling improves because the profile of the tyre decreases. Typically a 12" tyre on an Alto will have a 80 profile, while 13" will have 65 or 60 profile. The lower profile means thinner sidewalls, hence lower sidewall flex at high speeds. This is why the handling improves.

Lowering the car will obviously improve handling, due to lowering of the Centre of Gravity. But it will lead to other problems, like scraping on a speed breaker when loaded.

Also, I dont understand how a shift to 13" wheels led the car to scrape a speedbreaker. What profile were you trying out?
yes i had the tyre flex in mind. but the thing is 13" plus the spacer = raised height equation didnt go for me. also the dealer didnt recommend.
the car doesnt scrape the speedbreaker. the tyres scrap the wheel arc.



Quote:
Originally Posted by breezydrive View Post
You have actually downsized your wheels

Tyre profile -- Wheel diameter (mm)

145/80R12 ( stock Alto) -- 536.8

155/65R13 ( preferred upgrade) -- 531.7

155/65R12 ( opted by you) -- 506.3

145/70R12 ( stock M-800) -- 507.8

So, your upgrade is even lesser in size than Maruti 800's stock size.
A gross error of 5.4%, be ready for suspension related problems after 5-10K km.

Now, people claiming improvement in handing by increasing the rim size compensate it by reducing the side profile for retaining the same overall diameter ( max. 2-3% variation).

So, it is upto you whether you believe it or not?
opps sorry my mistake its 155/70 R12. ---- 521.71

for an alto you have to compensate a more than just the side wall thickness. there is a height difference of just 8 mm on the side wall between 155/70 R12 and 155/65 R13.

And if you add spacers to them and increase the height of your ride it will lead to stability problems.

yes one should believe when they try both the configurations on their altos. so that you can believe what you experience. some hard suspension altos dont scrape while some with soft scrap i.e the tyres scrap the wheel arcs.
Attached Images
  

Last edited by amit_mechengg : 10th June 2009 at 15:17.
amit_mechengg is offline   Reply With Quote
Old 10th June 2009, 16:19   #215
Distinguished - BHPian
 
Technocrat's Avatar
 
Join Date: Feb 2004
Location: Mid West
Posts: 14,900
Thanked: 2,492 Times
Default

Quote:
Originally Posted by Technocrat View Post
How are you calculating the wheel Dia?

12 inch = 304.8 millimeter

145/80 = 80% of 145 = 116mm

Am I missing something?
Oops I now got it what I was missing
Technocrat is offline   Reply With Quote
Old 10th June 2009, 23:02   #216
Newbie
 
Join Date: Mar 2005
Location: Kochi
Posts: 16
Thanked: 6 Times
Default

The Bridgestone India website offers the following sizes as optional sizes for the Alto:

S322 155/65R13 73S Tube Type
GIII 165/60R12 71H Tubeless
GIII 175/60R13 77H Tubeless

For optional sizes, it is advised to check the tyres for body touching after fitment or any other problem.

You may check their website for details:

Indian Tyres, Tyre market, Global Tyre companies
jathin is offline   Reply With Quote
Old 17th October 2009, 13:46   #217
BHPian
 
AnonymousCoward's Avatar
 
Join Date: Oct 2009
Location: Net City
Posts: 117
Thanked: 0 Times
Default

Hi folks,

While upgrading the tyre size of Alto from 145/80/12 to 155/65/13, as the RR (rotating radius) decreases (from 268.4mm to 265.85mm), will this result in reduction of GC (ground clearance)?

Thanks!
AnonymousCoward is offline   Reply With Quote
Old 18th October 2009, 19:24   #218
BHPian
 
AnonymousCoward's Avatar
 
Join Date: Oct 2009
Location: Net City
Posts: 117
Thanked: 0 Times
Default

Quote:
Originally Posted by AnonymousCoward View Post
Hi folks,

While upgrading the tyre size of Alto from 145/80/12 to 155/65/13, as the RR (rotating radius) decreases (from 268.4mm to 265.85mm), will this result in reduction of GC (ground clearance)?

Thanks!
*bump*... any info ?

Also, does anyone know if the Plati/League alloys come in 4.5J/5J width in size 13? Thanks!
AnonymousCoward is offline   Reply With Quote
Old 20th October 2009, 06:05   #219
Senior - BHPian
 
mithun's Avatar
 
Join Date: Jan 2006
Location: Cochin
Posts: 1,950
Thanked: 49 Times
Default

Quote:
Originally Posted by AnonymousCoward View Post
Hi folks,

While upgrading the tyre size of Alto from 145/80/12 to 155/65/13, as the RR (rotating radius) decreases (from 268.4mm to 265.85mm), will this result in reduction of GC (ground clearance)?

Thanks!
Yes, surely you GC will reduce by 2.55mm.
mithun is offline   Reply With Quote
Old 20th October 2009, 21:05   #220
BHPian
 
AnonymousCoward's Avatar
 
Join Date: Oct 2009
Location: Net City
Posts: 117
Thanked: 0 Times
Default

Quote:
Originally Posted by mithun View Post
Yes, surely you GC will reduce by 2.55mm.
Thanks Mithun - but is it 2.55mm or 2.55mmx2 since the former is Rotating Radius?
AnonymousCoward is offline   Reply With Quote
Old 1st November 2009, 10:21   #221
Distinguished - BHPian
 
jkdas's Avatar
 
Join Date: Sep 2005
Location: Thiruvananthapu
Posts: 9,661
Thanked: 1,389 Times
Default Would 4.5J alloys do for a 165 upsize for an Alto ?

Someone I know want to sell off his old Aura alloys that he has on his Alto as the tyres scrapes with 5 people and luggage.

I was quoted 8k for 5 alloys and a almost new MRF tyres ( I forgot if it was 165 or 155 and the rest of the specs).

Now, I would love to get 165 for my Alto. Can it be done with the Aura one's? Its 4.5J .

1) My car wont be used to carry 5 people , mostly 2 within city
2) If not 165, 155 which?
3) If 4 people which is safer? This will NEVER be a highway car.
4) Its an LXi
jkdas is offline   Reply With Quote
Old 1st November 2009, 10:39   #222
Team-BHP Support
 
Vid6639's Avatar
 
Join Date: Jul 2006
Location: Bangalore
Posts: 14,473
Thanked: 19,389 Times
Default

JK go for 155/65-13 in XM1+ or Turanza ER-60.

Akroy had them on his Alto. He also had 13" aura alloys.

2006 Alto LXi - akroy's Photo Gallery - Team-BHP
Vid6639 is offline   Reply With Quote
Old 1st November 2009, 18:52   #223
Distinguished - BHPian
 
Nikhilb2008's Avatar
 
Join Date: Jul 2006
Location: Bangalore
Posts: 4,825
Thanked: 4,804 Times
Default

4.5j is ok for 165. No worries.
Nikhilb2008 is offline   Reply With Quote
Old 1st November 2009, 21:51   #224
Distinguished - BHPian
 
jkdas's Avatar
 
Join Date: Sep 2005
Location: Thiruvananthapu
Posts: 9,661
Thanked: 1,389 Times
Default

Quote:
Originally Posted by vid6639 View Post
JK go for 155/65-13 in XM1+ or Turanza ER-60.

Akroy had them on his Alto. He also had 13" aura alloys.

2006 Alto LXi - akroy's Photo Gallery - Team-BHP
Quote:
Originally Posted by Nikhilb2008 View Post
4.5j is ok for 165. No worries.

Thanks Vid and Nikhil.

I would love the 165 as it should give a mean look. Any idea about the pricing of 155 and 165?

And 155/65 and 165/60 ?
jkdas is offline   Reply With Quote
Old 2nd November 2009, 10:46   #225
BHPian
 
AnonymousCoward's Avatar
 
Join Date: Oct 2009
Location: Net City
Posts: 117
Thanked: 0 Times
Default

Quote:
Originally Posted by jkdas View Post
Thanks Vid and Nikhil.

I would love the 165 as it should give a mean look. Any idea about the pricing of 155 and 165?

And 155/65 and 165/60 ?
JK, I think (someone can confirm) that GC will be reduced by 8mm+ in 165/60 and 5mm in 155/65. Hope you are OK with that much reduction in GC in 165/60 option.
AnonymousCoward is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Maruti Suzuki Swift : Tyre & wheel upgrade thread hemlock Tyre & Alloy wheel Section 2062 13th December 2017 17:22
Maruti Suzuki WagonR : Tyre & wheel upgrade thread iWonder Tyre & Alloy wheel Section 80 19th September 2017 09:34
Maruti Suzuki SX4 : Tyre & wheel upgrade thread loving_alaap Tyre & Alloy wheel Section 265 2nd July 2017 08:16
Maruti Suzuki Ritz : Tyre & wheel upgrade thread funda2max Tyre & Alloy wheel Section 384 3rd June 2017 20:36
Maruti Suzuki A-Star : Tyre & wheel upgrade thread JKBKS Tyre & Alloy wheel Section 57 20th December 2016 13:19


All times are GMT +5.5. The time now is 22:38.

Copyright 2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks