On 2017-01-20 17:51, John B. wrote:
On Fri, 20 Jan 2017 16:01:23 -0800, Joerg
wrote:
On 2017-01-20 15:38, John B. wrote:
On Fri, 20 Jan 2017 07:43:20 -0800, Joerg
wrote:
On 2017-01-19 19:00, John B. wrote:
On Thu, 19 Jan 2017 14:57:42 -0800, Joerg
wrote:
On 2017-01-19 14:39, Doug Landau wrote:
On road bikes it usually happens when hitting a rock "just so". Like
when the rock gets under the tire off center and flies off to the side
with gusto.
Haha and makes a loud CRACK as it hits the passenger door or window of the car to your left :-)
No kidding, that has happend. Also, drivers give me extra wide margin
when I just came off a dirt path in bad weather and all sorts of gunk
flies off my rear wheel.
I am beginning to wonder.
You have repeatedly stated that your usual speed is 20 MPH. Now, a 26
x 3.0 tire will be spinning at about 250 RPM at that speed..... But
this speeding tire accumulates "all kind of gunk"?
As explained many times 20mph is the speed on flat sections of trail or
slightly higher when downsloping a little. My average trail speed is
more around 10-12mph depending on turf unless I want to push it. Meaning
there are murky or gnarly stretches in the low single digit mph. There
are people on this NG who do not understand the difference between top
speed and average speed.
On such trails I often slow down to enjoy the scenery, animals, and so
on. Something that the "bicycles belong on road" people will likely
never understand.
Then I ride on 29" wheels. A usual scenario is that I come back on
singletrack from Placerville and the last section before entering a
regular road is this:
http://www.analogconsultants.com/ng/bike/Chapparal2.jpg
Imagine that after three days of rain. Also, on rainy days my average
speed on the "real" trail can drop substantially because the rear wheel
becomes stuck several times. Big clump of mud caked up near the BB,
wheel will hardly turn even in granny gear, have to stop, look around
for a sturdy branch piece of manzanita, poke the mud out of there,
continue the ride. Until it gets stuck again a few miles later.
Sometimes it's so bad that I strap that piece of manzanita onto the rack.
I ask as my road bike, who's wheels are spinning at only about 157 RPM
don't seem to accumulate any junk at all.
Well, do your road bike tires have knobbies? BTW, my road bike does
fling dirt off the wheels after a muddy stretch of "bush road" and I
have caked up its BB area with mud. Usually purposely rolling through
some water puddles washes the mud off the tires, something that does not
work for the MTB tires.
You are almost unbelievable. You have a double handful of mud lodged
on the bottom bracket and you need to run about and find a stick to
dislodge it.
Why can't you just grab a handful and throw it on the ground... oh, of
course you'd get your fingers dirty, wouldn't you.
Can you possibly imagine that there are occasions where one wants to
arrive at a destination without dirty hands? Even when ... gasp ...
using a bicycle for transportation in ... oh horror! ... non-ideal
weather along less than stellar paths?
Sure I can, but you say that are riding through the woods at speeds
not obtainable by professional MTB racers ...
This statement makes me sure that you have no clue about mountain
biking. Pros will leave me in the dust (and have) because a rider doing
20mph on a flat stretch of trail is something they consider a slowpoke.
... and you don't want to get
your hands dirty. But you are talking about California, where. if I
remember, it gets hot. You mean after your 20 MPH trip through 50
miles of "pristine wilderness" I believe you called it, you are not
covered with sweat and stinking like a goat?
In the summer I am totally drenched. Which is why I sometimes carry a
2nd T-shirt and a small towel in the panniers depending on where I go.
Other times I dunk it in a creek and also splash water over myself.
And where did I ever write about 20mph over 50 miles? Don't make stuff
up and falsely claim people wrote that. Because I didn't. Leave that
sort of stuff to the media, they are good at fake news lately :-)
https://www.youtube.com/watch?v=L_DETYq4WoE
Do you think these are all Tour de France riders? They are going around
20mph (speedometer shows km/h), they aren't breaking much of a sweat and
they are even chatting at times. It doesn't make much difference whether
you ride on a road or on a flat section of trail. You just have to watch
out for ruts and rocks on the trail.
Here is a classic high speed MTB ride on a mostly flat trail:
https://www.youtube.com/watch?v=F5hrN8ShNeE
You may not have those trails in Thailand but we do here in the US, lots
of them. Next time you are in the US rent a MTB, hop on and ride. It'll
open your mind about MTB, what they can really do. Yes, they are a
viable transport vehicle if equipped correctly. The real fun in
bicycling is not found on roads.
--
Regards, Joerg
http://www.analogconsultants.com/