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Lightweight 300 pound bikes typically use tire pressures in the 25psi range.
Middle weight 400 pound standard/sport bikes typically use tire pressures in the 35psi range.
It's normal for all pneumatic tires slowly lose some air pressure regardless of the bike being parked or in use.
Riding on under inflated or over inflated tires results negatively impacts on tire performance and rider safety.
Large heavy weight 600 pound touring bikes typically use tire pressures in the 40psi range.
Every US Department Of Transportation approved automotive and motorcycle tire has the tire birth date stamped tire sidewall. The format of this date appears in a WWYY format, as in week/year.
When a product is considered primo by the manufacturer but consumers mistakenly think otherwise, retailers and distributors are left in the cold.
If your bike sits for more than a few weeks at a time, it’s always a good idea to raise it off the ground to prevent flat spots from forming on the tires.
In fact, most tire companies put the “sell by” date somewhere out around five years from the date of manufacture.
So unless you don’t expect to wear the tire out within five years from the date that’s stamped on the sidewall, don’t sweat it.
For example the manufacture date code of 4407 translates to the 44th week of 2007.
Tires produced prior to the year 2000 use a three digit code.
If the trend continues, dealers be left with old rubber on hand and you can surmise the eventual results of that.