decent implementation ... Bad idea!
[ Tuesday -
March 13, 2012 ]
So the concept is there. It even makes a bit of sense
(mentally) and has been mentioned on ADVrider.com. I'm talking
about the use of heavy duty inner tubes to add just that little bit
more tire puncture protection. So for my 26K tire change, I
decided to use a set of Moose heavy duty inner tubes (instead of the
standard inner tubes used by the BMW dealer). yeah... the
concept is good, the implementation is decent, but it turns out this
is a bad idea. The added weight of the heavy duty tube and the
centripetal force made the wheel, when it's in motion, feel
heavy. Not only that, no matter how much I balance and
re-balance the wheel, it refuses to remain true at all speeds.
In the end, I went back to the regular inner tube and the 8GS
behaves the way it's suppose to. Even the amount of weights
used to balance the front wheel is 16oz instead of the heavy duty
tube's 37oz. That's significantly less. I don't know if
it's because the Moose heavy duty tubes aren't well balance in
construction, but the heavy tubes are making my 8GS a bit
wonky. In so many words, this is equivalent to saying, "BMW
knew what they were doing. There is no use in reinventing the
wheel (literally) so I'm sticking to the manufacturers specs."
The heavy tubes will be OK for off-road low speed riding, but for
this commuter boy (who will get up to Freeway speeds), forget the
wonky heavy tubes. I rather have the smoothness and agility of
the standard tubes.
Now I have to spend time to swap out the rear tube and re-balance
the rear wheel also. What a hassle.
Friday - May 4, 2012 ]
It's not the tube(s), it's the tire. It turns out the new
Continental Trail Attack front is defective. Whatever was done
during the manufacturing process, this front tire is not
concentric. I've had the Brown BMW folks in Pomona verify the
balance for both wheels and they said the electronic balancer says
they're both zeroed (e.g. completely balanced). It goes to
show that the Marc Parns static balancer I have is doing what it's
suppose to be doing. After riding another week with the funky
front tire, I can't wait to swap out the funky front. This
time around I'm trying the Dunlop TR91 Trailmax. Let's see how
well it does. So for the next 6K+ miles it'll be a Dunlop and
Conti duo until it's time to change things out again. Through
this lesson, I see now that riding with the heavy duty tubes would
be fine. However, the wheels do feel a bit weighed down with
the HD tubes. For myself I'm sticking to the regular butyl
tubes because it makes the bike light and flickable.
Written on: March 13, 2012
Last modified: March 13, 2012