rear tire psi.

Discussion in 'Touring Models' started by fattyboy, Oct 8, 2011.

  1. fattyboy

    fattyboy Active Member

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    hi,all i have a 2001 road king.The back tire is a Metzler me 880 marathon,140/90 B16 m/c77h reinforced. Iam getting ready to ride 2 up does anybody no what tire psi i should run when cold.
     
  2. skeeter114

    skeeter114 Member

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    I think with the ME880 is around 41 or 42lbs. I know when I ran them it was a few more that the Harley/Dunlop rear.
     
  3. gusotto

    gusotto Junior Member

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    The psi on the sidewall is maximum.
    The manufacture doesn't have any idea of what type of bike or load will be on the bike.
    Check the tire manufactures web site and it should help you.
    Metzeler tires run more air than Dunlops.
     
  4. Iceman24

    Iceman24 Well-Known Member

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    Agree - should see PSI on side of tire, along w/other #'s indicating tire size, rating, etc.
     
  5. fin_676

    fin_676 Experienced Member Staff Member Moderator Contributor

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    Although i dint have all the info on exact model of bike it seems to me that the correct size tyre for a bike of your type at that year should be an MT90 b16 which equates to a 130/90 b16 in which case the recommended psi would be 38
    however if you have a custom tyre size you will need to work out a custom pressure
    load the bike as it would be set the psi around 38 - 40 take bike for a ride get the tyres hot then check for hot pressure should be around 4 - 5 psi higher than cold if increase is more then the cold pressure is too low and if less the cold pressure is too high
    the increase in psi when hot is caused by the air in the tyre getting hot and expanding most of the heat is generated by sidewall flexing so more psi means more heat which is more flexing tyre to soft to start with

    Brian
     
  6. HDSickness

    HDSickness Banned

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    Manual calls for 40 psi with two up on rear and 36 psi front for stock Dunlops>
    I think I would go with that.
     
  7. btsom

    btsom Active Member

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    HEAT is what causes tires to fail. Heat is generated by tire flex. The more it flexes, the more heat it generates, so counter intuitively, UNDER inflation causes tires to blow out or come apart. The more load you put on your tire, the more pressure it should have to carry that load. For 2 up, especially with baggage added in, go with the sidewall max allowed. A little too much pressure is better than a little too little when safety rather than cushy ride is important.
     
  8. Jack Klarich

    Jack Klarich Expert Member

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    Metzlers are a funny animal check with the distributor, I think I remember Hoople saying they want you to run the max pressure on the sidewall:s METZELER - Recommended_tire_pressures
     
  9. fattyboy

    fattyboy Active Member

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    On the sidewall it says 50psi cold,got on metzelers web site ,they say 46-48 for 2 up thank you .
     
  10. fattyboy

    fattyboy Active Member

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    Thank you for the web site. They say for 2 up the psi should be46-48 for the rear.Thanks Again.