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Equipment & Gear => Power Equipment & RV => Topic started by: CP on April 27, 2022, 09:15:49 AM

Title: Question for you tire experts?
Post by: CP on April 27, 2022, 09:15:49 AM: I’m helping a friend with a motorcycle project and the bike has a pair of low mileage Michelin tires. They look to be in good shape, plenty of tread left. However, the date code appears to be 4712 (Nov. 2012) or almost 10 years old.

I guess the only question is, use them or change them? How old is too old for tires?
Title: Re: Question for you tire experts?
Post by: pianoman9701 on April 27, 2022, 09:18:49 AM: Replace them after 6 years, especially on a bike. A blowout on a bike is often catastrophic.
Title: Re: Question for you tire experts?
Post by: Jingles on April 27, 2022, 09:39:21 AM: Not a tire expert but have to say the saying for something that old on a bike applies, "When in doubt throw them out"
Title: Re: Question for you tire experts?
Post by: Special T on April 27, 2022, 09:40:49 AM: I've run 28 year old tires on my run around town truck. I'd be more selective on a high speed 2 wheel cycle. Now to be fair, a tire that is 10 years old that has been parked inside it whole life, out of the sun and cold isn't the same as you car you leave parked outside. Also when you buy new, they likely are a year or more old.
Title: Re: Question for you tire experts?
Post by: pianoman9701 on April 27, 2022, 09:48:55 AM: Quote from: Special T on April 27, 2022, 09:40:49 AM
I've run 28 year old tires on my run around town truck. I'd be more selective on a high speed 2 wheel cycle. Now to be fair, a tire that is 10 years old that has been parked inside it whole life, out of the sun and cold in the same as you car you leave parked outside. Also when you buy new, they likely are a year or more old.

This guy knows tires like no one else on the forum. :tup:
Title: Re: Question for you tire experts?
Post by: Boss .300 winmag on April 27, 2022, 09:55:54 AM: How do you get November out of 4712?
Title: Re: Question for you tire experts?
Post by: CP on April 27, 2022, 10:00:57 AM: Quote from: Boss .300 winmag on April 27, 2022, 09:55:54 AM
How do you get November out of 4712?

47th week of 2012. Am I interpreting that incorrectly?
Title: Re: Question for you tire experts?
Post by: Boss .300 winmag on April 27, 2022, 10:37:28 AM: Quote from: CP on April 27, 2022, 10:00:57 AM
Quote from: Boss .300 winmag on April 27, 2022, 09:55:54 AM
How do you get November out of 4712?

47th week of 2012. Am I interpreting that incorrectly?

That’s what I was thinking.
Title: Re: Question for you tire experts?
Post by: Special T on April 27, 2022, 11:44:57 AM: Quote from: CP on April 27, 2022, 10:00:57 AM
Quote from: Boss .300 winmag on April 27, 2022, 09:55:54 AM
How do you get November out of 4712?

47th week of 2012. Am I interpreting that incorrectly?

Correct
Title: Re: Question for you tire experts?
Post by: CP on April 27, 2022, 01:05:00 PM: After weighing the risks vs rewards - new set of tires ordered.
Title: Re: Question for you tire experts?
Post by: MR5x5 on April 27, 2022, 01:34:48 PM: Quote from: CP on April 27, 2022, 10:00:57 AM
Quote from: Boss .300 winmag on April 27, 2022, 09:55:54 AM
How do you get November out of 4712?

47th week of 2012. Am I interpreting that incorrectly?

Nah. 4+7 = 11 = November :P
Title: Re: Question for you tire experts?
Post by: wadu1 on April 27, 2022, 02:19:39 PM: The tire date code, also known as the DOT code is four digits giving you first the week number and then the year(in two digits) of manufacture.
Title: Re: Question for you tire experts?
Post by: jackelope on April 27, 2022, 05:56:20 PM: Quote from: wadu1 on April 27, 2022, 02:19:39 PM
The tire date code, also known as the DOT code is four digits giving you first the week number and then the year(in two digits) of manufacture.

The date code is only part of the DOT code on a tire.

I'm not a motorcycle guy, but I do sell tires(by no means am I a tire expert of any sort).I think 10 year old tires on a bike is risky.
Title: Re: Question for you tire experts?
Post by: Westside88 on April 27, 2022, 07:51:09 PM: Old tires don’t usually bother me if they seem to be good. 10 years doesn’t seem that old to me, but on a street bike your margin’s are so low I say if in doubt throw em out.