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Tire date
- Thread starter 179212
- Start date
beemerphile
New member
It is the last digits of the DOT number. Normally there are four digits. The first two are the week of the year and the last two are the year. I have not seen a three digit date code, but it may be the 32nd week of 2009 if they are using a single digit 9 for 09.
akbeemer
SURVIVOR
It looks as if the tire was made prior to 2000. Use the last three digits of the Tire Identification Number. The first two digits are the week of the year. The last digit is the year of a decade (1982, 1992). Yours reads 422, so 42nd week of 1992 or maybe 1982.
Prior to 2000 you use only the last three digits.
https://m.tirerack.com/tires/tiretech/techpage.jsp?techid=11
Prior to 2000 you use only the last three digits.
https://m.tirerack.com/tires/tiretech/techpage.jsp?techid=11
pglaves
#13338
I think it is the 32nd week of 1999 (or 1989). In either case way to old except to plant a tree in its middle.
Paul is correct.
From 1970 to 2000, they only used three numbers (two for the week and the last one for the year). It then dawned on them that people could still get confused by which decade so they changed it to four numbers in 2000 with the last two being the year.
Your tire is from the 32 week of 1999 (they added the little triangle at the end of the number to indicate it was from the '90s before they finally got smart and started usung actual numbers to indicate the decade).
I hear that Elon Musk is applying for permission to use a fifth number to indicate the millenium on the tires for the 2025 Tesla.
From 1970 to 2000, they only used three numbers (two for the week and the last one for the year). It then dawned on them that people could still get confused by which decade so they changed it to four numbers in 2000 with the last two being the year.
Your tire is from the 32 week of 1999 (they added the little triangle at the end of the number to indicate it was from the '90s before they finally got smart and started usung actual numbers to indicate the decade).
I hear that Elon Musk is applying for permission to use a fifth number to indicate the millenium on the tires for the 2025 Tesla.
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pglaves
#13338
But the tread still real good
I once bought an R60/5, intending to make it a vintage race bike. The tires were a decade or so old. I could not dismount those tires using normal means. They were too old and stiff and hard. I got them off with a sabre saw, but it was not a pretty sight.
Do you mean new tires are not like riding on rubber rocks?
Next I want to thank all for help it’s nice to know my front tire is 20 years old!
Now the dreaded, the bike is a BMW 1978 R100/7
The owners manual info front tire 3.25H19 Rear tire 4.00H18
I would like to have tires with vintage look, ( least important aspect )
When I do the search I get tube type, tubeless
When I check fit I get lots that come up but say they will not fit my bike
So help need recommendations
beemerphile
New member
It doesn't get more classic than this for a '78...
https://www.revzilla.com/motorcycle/continental-rb2k112-classic-tires
52184
GTRider
These are about as classic a look as you can get for that bike, and are available in the correct inch sizing:
https://www.amazon.com/Continental-...09891&sr=8-9&keywords=3.25-19+motorcycle+tire
But be advised that there are newer compounds and tread patterns that offer better performance, like these:
https://www.revzilla.com/motorcycle/michelin-pilot-activ-tire
The Michelins are great tires but really tough to mount, even with a tire machine.
Many Airheads also like the Bridgestone Spitfires, but I am not finding those in inch sizing.
Best,
DG
IMO if you're doing serious miles on the bike, I'd go with a newer tire with modern compound. On my much older bikes, I do tend to purchase vintage looking tires, but those bikes don't get much other than local short trips. But the /7 tends to get more miles at higher speeds.
Think more about safety and performance rather than looks.
Think more about safety and performance rather than looks.
I agree 100%. I just replaced the tires on a new to me k75, the originals were dated 1992. Put a set of bias ply Avons on it, as you said, "like a new machine". Cheers.
OK.. I posted something about this a bit back including the fact that the K75 was running on tires that were nearly 27 years old.
here is the kicker. Those tires were showing NO wearing AT ALL until a week before I replaced them.
BUT, I was having problems sticking to the road and the bike would feel like it was slipping sideways on turns.
personally, I would just replace both and not worry about it.
here is the kicker. Those tires were showing NO wearing AT ALL until a week before I replaced them.
BUT, I was having problems sticking to the road and the bike would feel like it was slipping sideways on turns.
personally, I would just replace both and not worry about it.
