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Old January 18th 17, 02:10 AM posted to rec.bicycles.tech
JBeattie
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Posts: 5,870
Default Stronger rubber cement?

On Tuesday, January 17, 2017 at 5:59:34 PM UTC-8, John B. wrote:
On Tue, 17 Jan 2017 07:50:19 -0800, Joerg
wrote:

On 2017-01-16 19:28, jbeattie wrote:
On Monday, January 16, 2017 at 4:23:53 PM UTC-8, Joerg wrote:
On 2017-01-16 13:39, Sir Ridesalot wrote:
On Monday, January 16, 2017 at 2:39:18 PM UTC-5, jbeattie wrote:
On Monday, January 16, 2017 at 11:03:05 AM UTC-8, Joerg wrote:
On 2017-01-16 10:43, David Scheidt wrote:
Joerg wrote:

:Yup. Standard bicycle tubes are usually junk. Would you accept
it if you :had to pump up the tires of your car every two
weeks? Yet most cyclists :think this is "normal".

Automotive tires have a much lower ratio of surface area to
volume than bike tires. They're also run a lower pressure, for
the most part.


Truck tires are often operated around 50psi or higher. Like my
MTB tires are.

A truck tire weights as a much as TWO UCI minimum race bikes -- or
one DH bike. Now throw in the rim. You have peculiar expectations
for bicycles. You're theoretically perfect bike would weigh about
250lbs.

-- Jay Beattie.

I've said it before and I'll say it again. What Joerg's wants in a
bicycle are would be met by a 250cc dirt-motorcycle converted to
pedal power and the engine removed.

I find it astounding that so many others who ride in very harsh
conditions do NOT have the breakages or other problems that Joerg
does.


According to several bicycle shop owners they do. Many said that two
factors allowed them to survive as a business:

1. Mountain bikers breaking stuff all the time.

2. Department store bike buyers who needed help and found that the store
that sold their bikes was less than helpful.

Unlike cars, which never need to be fixed, and that's why there are no auto repair shops. http://tinyurl.com/jba5fgb


Care to compare the number of vehicles plus the miles traveled? Maybe
then it becomes more clear. Cars are way more reliable than bicycles.
Especially if you buy top quality cars like we did. Other than regular
scheduled maintenance there were no breakdowns in the whole two decades
we own them. None, as in zero. Not even one flat tire. Try that with a
bicycle.


You talk about your auto escapades as hauling a half a cord of wood in
your SUV. You describe your bicycle riding as speeding down rocky
hills, leaping over bumps and unexpectedly diving into lakes.

If you drove your car the way that you claim to ride your bike I think
that you would have a very different concept of how bullet proof your
car is.

I've spent considerable time around trucks that haul heavy loads over
unimproved roads and my experience was that they definitely did
require frequent repairs.

I've also been around off the road racing cars and they took even more
maintenance than the trucks.

As usual, you are not comparing apples and apples.


I ride with a guy who races motorcycles. He can go through a set of tires over the course of weekend -- and they cost a mint. Talk about an expensive hobby.

-- Jay Beattie.
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