On 2016-07-14 17:27, John B. wrote:
> On Thu, 14 Jul 2016 02:42:13 +0200, Emanuel Berg
> <
embe...@student.uu.se> wrote:
>
>> John B. <
slocom...@gmail.xyz> writes:
>>
>>> Yes. And there are examples of a piece of
>>> straw being driven into a palm tree during
>>> a tornado too, but not very often :-)
>>
>> For a fender I think you could make the case it
>> is a danger having somewhat sharp edges, not
>> only in accidents but also when you move the
>> bike around (e.g., putting it upside down on
>> a table), for this ~1 cm^2 piece it is more
>> like a principle doing the right thing when it
>> doesn't matter hopefully means you'll do the
>> right thing when it does matter, and you'll be
>> better at it because of the practise, and in
>> the meantime you don't have to think about
>> whether to do it or not, instead you just do it
>> - more relaxed. So the file and sand-paper
>> solution will work out fine I think :)
>
> I just can't get all excited about all these "dangers" that I see the
> Internet advertising. Example: a large "chief's knife" would be about
> the size of a "sax knife" (see Saxon) and you can easily kill someone
> with one. On the other hand my wife uses one almost every day.
>
That is a multi-purpose tool. Generally of peaceful use but if she were
assaulted by an intruder it can also be used for defense. Just like a
gun can be used for hunting or for defense.
> Sharp edges on fenders? Maybe, but when you hit the tree at 30 KPH and
> break your hip any scratches from the fenders is going to seem rather
> incidental.
>
An "involuntary dismount" on a MTB at high speed is often caused by the
bike abruptly stopping because of an obstacle while the rider you can
fly off clean and roll. People who have done parachuting or Judo know
how to roll properly to absorb energy in a non bone-crushing way. It
would be nice not to find blood gushing from a cut afterwards,
especially when this happens in the middle of nowhere. Smart bike
dealers are keenly aware of this. When I mentioned I wanted to play
around with stems and handlebar height my bike dealer (MTB competition
rider) told me never to let the top washer stack exceed 5mm.
I've had one high speed crash years ago where it went the other way. Was
late, had to get home, singletrack, 20mph, 21mph, 22mph ... woohoo ...
*THWOCK* ... a Manzanita branch grabbed my hydration pack and violently
yanked me out of the saddle. The rear of the MTB slid through my legs
(but no cuts because there is never anything sharp-edge on my bikes) and
the bike continued alone until flipping over when it hit something. I
rolled off to the side. Most amazing was that the hydration pack did not
tear. Hats off to Zefal for the quality of their product.