How much tire weight is too much?

Discussion in 'Motorbike Technical Discussion' started by B. Peg, Jan 17, 2008.

  1. B. Peg

    B. Peg Guest

    Had to put nearly 3 ounces (85 grams) of weights on an Avon Storm tire to
    get it to static balance. Seemed like a lot of weight for a premium tire.
    Anyone had similar experience?

    Dealer said I shouldn't have to balance it since most motorcycle tires are
    pretty much balanced from the manufacturer. Not to doubt him, but that
    seems a stretch.

    B~
     
    B. Peg, Jan 17, 2008
    #1
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  2. How well did the wheel balance by itself before the tire
    was mounted ?
     
    Rob Kleinschmidt, Jan 17, 2008
    #2
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  3. Ri-ight.
     
    The Older Gentleman, Jan 17, 2008
    #3
  4. Did you put the splice opposite the valve stem? It's been a while
    since I changed my own tyres, but ISTR that some manufacturers put the
    paint dot at the splice and some put it opposite. I ended up ignoring
    that and physically locating the splice myself. Maybe tyre technology has
    changed a lot since, but if the tyre itself is perfectly balanced (e.g. no
    splice) you still have to counter the valve stem. The other problem is if
    you don't get the tyre seated properly all the way around -- the
    circumferential marking should be equidistant from the rim all the way
    around on both sides.

    --
    Ivan Reid, School of Engineering & Design, _____________ CMS Collaboration,
    Brunel University. [email protected][brunel.ac.uk|cern.ch] Room 40-1-B12, CERN
    GSX600F, RG250WD "You Porsche. Me pass!" DoD #484 JKLO#003, 005
    WP7# 3000 LC Unit #2368 (tinlc) UKMC#00009 BOTAFOT#16 UKRMMA#7 (Hon)
    KotPT -- "for stupidity above and beyond the call of duty".
     
    Dr Ivan D. Reid, Jan 17, 2008
    #4
  5. If I remember rightly, the Avons don't have a designated heavy spot. The
    irony is if the tire doesn't have a heavy spot, you need more weight to
    counter the valve.

    For the record, was the added weight opposite the valve?
     
    George R. Young, Jan 18, 2008
    #5
  6. B. Peg

    B. Peg Guest

    George, you're right. The weight is exactly 180 degrees from the valve.
    The previous Avon on the bike had maybe 1-1/2 ounces, but it was maybe 110
    degrees from the valve. The Avons did not have any mark or dot for
    positioning next to the valve stem. They must overlap the rayon belt quite
    a bit for 3 ounces. I would have liked to try and rotate the tire but after
    the bead seals, it becomes a major pita to fuss with breaking it down again
    by hand.

    Fwiw, I haven't seen any tire balance out enough for a dealer to say
    "They're good enough as is and don't require balancing." Probably just
    don't want to balance them. The Metzelers balanced out with far less weight
    but the ride was much harsher due to the steel belt and tendency to scallop
    around the tread patterns.

    I'll try the pair of Maxon's buried in the garage after I shred the Avons in
    about 3K miles. My sportbike tires just don't last very long.

    B~
     
    B. Peg, Jan 18, 2008
    #6
  7. Ding. Go to a proper tyre place.
     
    The Older Gentleman, Jan 18, 2008
    #7
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