The Smell of Molten Projects in the Morning

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The New Hotness

  • Schwalbe Marathon Plus vs. Glass Chip

    My pre-ride thumb check showed a flat rear tire on Mary’s Tour Easy:

    Glass chip - end view in tread
    Glass chip – end view in tread

    So we fetched groceries with the car.

    As usual, no tire armor can withstand a glass blade:

    Glass Chip - side view
    Glass Chip – side view

    It’s a bit over 5 mm from the knife edge to the ground-flat end, just long enough to punch through a rather well-worn Schwalbe Marathon Plus tire and poke a slow leak in the tube.

    The tire has covered enough miles to wear the tread down to maybe half a millimeter over the blue armor layer:

    Glass chip - tire damage
    Glass chip – tire damage

    Time for a new tire!

    For the record, the odometer is just shy of 35 k miles and she rides about 1500 miles a year; somewhat less over the last year for reasons not relevant here. As best I can tell, the tire has been on there for about five years and 7000 miles.