Legal minimum tire tread
No doubt this morning was an intensely exciting one for a driver that I passed by this morning. She had obviously done some panicked steering on the rain soaked highway judging from the marks in the median and the amount of grass and mud in the fast lane. Others had already stopped to help and aside from being stuck in the median she and her vehicle appeared relatively unharmed.
This turned my thoughts to the tread on my tires and the question of how much tread is needed to stop and steer properly on wet roads. We know that tires are considered to be worn out at 1.5 mm or 2/32nds of an inch unless they are winter tires, in which case the limit is 3 mm or 4/32nds of an inch of tread depth. Is that really enough?
It appears that if you intend to drive on wet roads 4 mm may be the minimum tread depth needed to stop and steer effectively. Without at least this much tread the tire cannot move water away from the tread fast enough to maintain adequate traction. To drive with less tread is not illegal until you reach the legislated minimums, but it may not be safe.
One last thought and that is to buy a decent tire gauge to keep in your glovebox. Use it every couple of weeks before you start out and make sure that the tires are inflated to the specifications on your vehicle's tire placard. Proper inflation helps tread do its part to prevent hydroplaning.
The author is a retired constable with many years of traffic law enforcement experience. To comment or learn more, please visit www.drivesmartbc.ca.
Read more Behind the Wheel articles
Tim Schewe has been writing his column for most of the 20 years in his traffic enforcement service in the RCMP. It was 'The Beat Goes On' in Fort St. John, 'Traffic Tips' in the South Okanagan and now 'Behind the Wheel' on Vancouver Island and now Castanet.net. Schewe retired from the Force in January of 2006, but the column became a habit and continues.
E-mail him your questions or concerns: [email protected]
- Don't let this become your default setting Jul 26
- I can rationalize that behaviour Jul 19
- The courtesy wave Jul 12
- Electronic device use Jul 5
- The keep right attitude Jun 28
- Leaving your vehicle unsecured Jun 21
- How wide? How long? How high? Jun 14
- Smart cyclists ride on the right May 31
(Click for RSS instructions.)