"When should I replace my tires?" per Tire Rack - The Unofficial BMW M5 Messageboard (m5board.com)

howler · 3rd February 2005, 23:43

I found this interesting tire tech tip on Tire Rack's website:

"U.S. coins can be substituted for a tire tread depth gauge as tires wear to the critical final few 32nds of an inch of their remaining tread depth.

Place a penny into several tread grooves across the tire. If part of Lincoln's head is always covered by the tread, you have more than 2/32" of tread depth remaining.

Place a quarter into several tread grooves across the tire. If part of Washington's head is always covered by the tread, you have more than 4/32" of tread depth remaining.

Place a penny into several tread grooves across the tire. If the top of the Lincoln Memorial is always covered by the tread, you have more than 6/32" of tread depth remaining."

The rest of the article can be found here: http://www.tirerack.com/tires/tiretech/general/replacewhen.jsp

gsfent · 4th February 2005, 00:12

Quote:

Originally Posted by howler

I found this interesting tire tech tip on Tire Rack's website:

"U.S. coins can be substituted for a tire tread depth gauge as tires wear to the critical final few 32nds of an inch of their remaining tread depth.

Place a penny into several tread grooves across the tire. If part of Lincoln's head is always covered by the tread, you have more than 2/32" of tread depth remaining.

Place a quarter into several tread grooves across the tire. If part of Washington's head is always covered by the tread, you have more than 4/32" of tread depth remaining.

Place a penny into several tread grooves across the tire. If the top of the Lincoln Memorial is always covered by the tread, you have more than 6/32" of tread depth remaining."

The rest of the article can be found here: http://www.tirerack.com/tires/tiretech/general/replacewhen.jsp

I have heard of the Lincoln's head on a penny method before. When you get there, you have perfect track tires!!

Regards,
Jerry