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


Reply
 
Thread Tools Search this Thread
Old 3rd September 2008, 10:44   #1
Senior - BHPian
 
mithun's Avatar
 
Join Date: Jan 2006
Location: Cochin
Posts: 1,950
Thanked: 49 Times
Arrow Coin Test for Tyre Wear checking

As a thumb rule, it's often advised to use a 1 rupee coin to check tread wear. If the head of the Ashoka symbol is visible when the coin is placed inside the tread, then its time to change the tyres.
  • Is this test foolproof ?
  • Is there any other better reliable methods than the coin test ?
  • Is this test applies to both 2 & 4 wheeler tyres ?
mithun is offline   Reply With Quote
Old 3rd September 2008, 11:18   #2
BHPian
 
mikem's Avatar
 
Join Date: Mar 2005
Location: Mumbai
Posts: 84
Thanked: 89 Times
Default Tyre Tread Depth vs stopping distance

Watch this tyre tread depth vs stopping distance by tirerack at youtube.

This show how 2 mm can cut the wet stopping distance in half. This is a must see.
mikem is offline   Reply With Quote
Old 3rd September 2008, 12:28   #3
Senior - BHPian
 
Join Date: Dec 2006
Location: pune
Posts: 1,243
Thanked: 519 Times
Default

I guess minimum tread depths are 1 mm for two wheelers and 1.5 mm for four wheelers. Tyre gurus please confirm.
sukiwa is offline   Reply With Quote
Old 3rd September 2008, 12:54   #4
Senior - BHPian
 
Join Date: Sep 2007
Location: New Delhi
Posts: 3,083
Thanked: 252 Times
Default

All major tyre showrooms have a template to check tyre wear. Each maker presents such a template to authorized dealers.
anupmathur is offline   Reply With Quote
Old 3rd September 2008, 13:27   #5
BHPian
 
jai-uno-t's Avatar
 
Join Date: Aug 2008
Location: london
Posts: 67
Thanked: 62 Times
Default

do your tyres not have wear indicators in the tread moulding? personally if the tread is getting close to them, them it's time for a new set
jai-uno-t is offline   Reply With Quote
Old 3rd September 2008, 17:05   #6
Senior - BHPian
 
abhinav.gupta88's Avatar
 
Join Date: Sep 2007
Location: Delhi , India
Posts: 4,087
Thanked: 308 Times
Default

Best is to ask a local mechanic or tyre dealer than go to the showroom for this.
abhinav.gupta88 is offline   Reply With Quote
Old 3rd September 2008, 17:37   #7
BHPian
 
PatchyBoy's Avatar
 
Join Date: Nov 2007
Location: Earth
Posts: 822
Thanked: 1,189 Times
Default

Here is how:

Tread depth and tread wear indicators



For the most part, motoring law in most countries determines that your tires need a minimum tread depth to be legal. This varies from country to country but is normally around 1.6mm. To assist you in figuring out when you're getting close to that value, most tires have tread wear indicators built into them. If you look around the tread carefully, at some point you'll see a bar of rubber which goes across the tread and isn't part of the regular pattern (see the picture here for an example). This is the wear indicator. It's really basic, but it's also pretty foolproof. The tread wear indicator is moulded into the rubber at a depth of about 2mm normally. As the rubber in your tires wears away due to everyday use, the tread wears down. At some point, the tire tread will become flush with the wear indicator (which is normally recessed into the tread). At this point you have about 2mm of tread left - in other words it is time to change tires.

Credit: Car Bibles : The Wheel and Tire Bible Page 1 of 2

Cheers,

Rajan
PatchyBoy is offline   (1) Thanks Reply With Quote
Old 3rd September 2008, 17:40   #8
Senior - BHPian
 
Ricky_63's Avatar
 
Join Date: Dec 2006
Location: Gurgaon
Posts: 3,847
Thanked: 377 Times
Default

A bit O.T. but true none the less.

It is unfortunate that in our country the Traffic Cops NEVER look at the condition of tyres.

I have seen enough of us drive cars with ZERO tread depth. Infact the tyre's belts are showing thru the surface. I have even seen trucks drive with very bad tyres.

I for one have never taken a chance with the depth of my tyre tread. If the tyre is capable to run 35000 kms I am one of those who'd rather change it at 30000 kms.

It is dangerous & totally false economy, to run tyres without adequate tread depth.



Cheers

Last edited by Ricky_63 : 3rd September 2008 at 17:43.
Ricky_63 is offline   (1) Thanks Reply With Quote
Old 3rd September 2008, 18:05   #9
Senior - BHPian
 
headers's Avatar
 
Join Date: May 2006
Location: Greater Chennai
Posts: 4,589
Thanked: 454 Times
Default

Its 2mm for cars IMO

Ishan, is that right?
headers is offline   Reply With Quote
Old 3rd September 2008, 18:19   #10
Senior - BHPian
 
Join Date: Sep 2007
Location: New Delhi
Posts: 3,083
Thanked: 252 Times
Default

Worth mentioning that uneven wear can be as dangerous as full/even wear. I've seen tyres many completely worn out on one side and a healthy amount of 'reassuring' tread showing on the other side.
anupmathur is offline   Reply With Quote
Old 3rd September 2008, 19:03   #11
Senior - BHPian
 
snaronikar's Avatar
 
Join Date: Jun 2007
Location: Bengaluru
Posts: 2,845
Thanked: 23 Times
Default

As patchyboy has said, the tyre wear meter is built in the tyres. I have visited Bridgestone tyres in Indore and they also recommend the same.
snaronikar is offline   Reply With Quote
Old 3rd September 2008, 23:58   #12
Senior - BHPian
 
iraghava's Avatar
 
Join Date: Oct 2005
Location: Bhaiyyaland
Posts: 8,028
Thanked: 154 Times
Default

Yes Headers, the legal limit for car tyres is a minimum depth of 2 mm. Anything below is considered illegal.
iraghava is offline   Reply With Quote
Old 4th September 2008, 08:08   #13
Senior - BHPian
 
Join Date: Jun 2007
Location: Kochi
Posts: 2,147
Thanked: 143 Times
Default

Quote:
Originally Posted by Ricky_63 View Post
It is unfortunate that in our country the Traffic Cops NEVER look at the condition of tyres.
While I understand your point that driving with bad tyres is dangerous for everybody, it is bad if cops have yet another reason to demand hafta.

Here is my experience with Motor Vehicle inspestors in the motor vehicle department. The vehicle is undergoing its annual "fitness renewal test" and guy is inspecting the underbody. On the mountigs of the spring leaf, where the leaf assembly connects to the yoke / shoe, the bugger sees a strange looking nut, with a tear drop like protrusion. This tear drop like thing has a hole. The bugger says "that hole should not be there".

If you did not get it, he was looking at a grease nipple. If that is level of knowledge empowered persons supposed to have technical knowledge, just imagine what the sada havaldar will start saying.
BaCkSeAtDrIVeR is offline   Reply With Quote
Old 4th September 2008, 08:20   #14
Team-BHP Support
 
bblost's Avatar
 
Join Date: Jul 2007
Location: Hyderabad
Posts: 9,650
Thanked: 6,663 Times
Default

I find a lot of cabs with worn out tyres.
I dont use them but if you do.
You might consider raising this issue with your admin in-charge.
bblost is offline   Reply With Quote
Old 5th September 2008, 09:23   #15
Senior - BHPian
 
mithun's Avatar
 
Join Date: Jan 2006
Location: Cochin
Posts: 1,950
Thanked: 49 Times
Default

In tyres with no wear indicator, how can we make out that it's time to change the tyre ?

In some bike tyres, I couldn't find any wear indicator !
mithun 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
Autosure - The car test lab. Checking, testing & analysis of your car Tushar Technical Stuff 5 7th September 2015 14:38
Coin and Currency Collectors shivshanker Shifting gears 10 30th May 2014 14:56
Blue L.E.D Cup, Coin holder Light, with 2 Extended/Adjustable L.E.D. Lights ghpk Technical Stuff 18 10th January 2010 02:45
Uneven Tyre wear!? - Goodyear GSD2 Eagle F1 anarchist Tyre & Alloy wheel Section 4 10th March 2006 13:00


All times are GMT +5.5. The time now is 01:14.

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