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  1. #1
    Bike rider alexaschwanden's Avatar
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    Jun 2010
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    Tire safety question

    I noticed a million little micro fractures on both sides front and rear tire, should I replace both tires or wait till I have have 1500 miles on it, right now it has 767 miles on it. They are zaffiro slicks ( cheap kind that came with the bike.) I have 80-90 psi , 165 lbs.
    2013 Felt 960 29er MTB. 1,336.2 miles
    2013 Raleigh Revenio 2.0. 813.5 miles

  2. #2
    Senior Member
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    Apr 2009
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    too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
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    Micro fractures or checking is common and normal on tires, and nothing to worry about. As you ride, the tire flexes, and the rubber which may be hardened bu UV, ozone, or just age will do that. It doesn't matter, because the rubber is only there for traction and as physical protection for the fabric underneath which is what provides the strength.

    BTW- the 1500 mile figure is meaningless. Tires age over time and miles. Time is probably 5-10 years on average, and mileage until the tread wears through to the under layer, which happens when it happen, not at a fixed distance.
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    WARNING, I'm from New York. Thin skinned people should maintain safe distance.

  3. #3
    Bike rider alexaschwanden's Avatar
    Join Date
    Jun 2010
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    2013 Felt 960, 2013 Raleigh Revenio 2.0
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    2013 Felt 960 29er MTB. 1,336.2 miles
    2013 Raleigh Revenio 2.0. 813.5 miles

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