On 18/02/2018 22:32, ultred ragnusen wrote:

I can't stake my mortgage on the percentage but I did say one tenth of one
percent, and I did easily count over fifty objects per tire, which is about
800 objects per year, which let's just call 1000 objects in a year for
simplicity of math per set of four tires.

One tenth of one percent of that number is 1 slow leak a year due to
shards, which I agree might be too much.

My apologies, I did mis-read one tenth as ten percent.

However, even when I've had slow leaks its been objects that have fully
penetrated the tyre at the the time I ran over it, or a few rotations of
the wheel later. Nails and screws often cause a puncture but then until
removed either seal the puncture or cause a very slow leak


Statistically speaking, I get your drift that it isn't worth removing
shards from a tire just to prevent a slow leak every couple of years, but,
anecdotally, what do you think this shard would have done, over time?
http://wetakepic.com/images/2018/02/18/splinter3.jpg

i) it would have fallen off.
ii) as the tyre wears it would have become the high spot and be ground
off by the road surface



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