Re: Perpetual Tire Thread

[Robert Silas <robert.silas@xxxxxxxxxxxx>]

I am not a hot shot rider. Basically any performance tire can do more than I
can.  My experience in just over 150,000 km on a '94 R1100RS, regarding
tires, started with Z4s which I found that they are good in rain (still
trusting them the most), the front tire wears too fast too much on one side
and they do not last long enough.
I do not have capping problem with front tires, I am not in the habbit of
sudden braking (except emergency).
I had no choise but to buy a rear BT-54?? or 57 ??? in Toledo on the way
home. Once I had that, I tried BT 57 on the front and I liked the BT-
combination. I had a set of  Micheline which I did not like, then BT-020s,
then I tried BT-010/020 combination and now I am back on BT-020s which are
good enough for all my riding at the right price.

By the way, while a bike is leaned in, the leaned position is maintained by
the balance between gravity and centrifugal forces. As soon the brake
applied speed reduces, which reduce the centrifugal force, therefore gravity
is not balanced any more and the bike tends to fall inwards. To avoid that
fall the centrifugal force has to be increased, which is in the lack of
speed, can only be done by the tightening of the turn.
Just the same as it is with bicyckling and skiing.
Bob Silas
Montreal


- ----- Original Message -----
From: Andrew Johnson
To: oilheads@xxxxxxxxx
Sent: Thursday, December 21, 2006 5:18 PM
Subject: Perpetual Tire Thread


At 1:25 PM -0800 12/21/06, Marco S Hyman wrote:
>Robert Silas writes:
>  > Is the tire responsible for "to stand the buke up under braking when
leaned
>  > over"???????
>
>The location and shape of the contact patch is partially responsible for
>the bike standing when brakes are applied in a turn.  When I had my RT
>the Z6 were easily my favorite handling tire in that they were the most
>neutral.  I didn't have to force the bike into a turn nor did I have
>to keep the front end from flopping over too far (something that the
>BT-020 had a tendency to do).   And, as noted, the bike would not stand
>as fast should I be foolish enough to apply lots of brakes while leaned
>over.
>
>Now that I'm on a GS I find that the tourance is almost as nice as
>the Z6 in handling, yet lasts twice as long!
>
>// marc

I've primarily had Tourances on the 1150GS. Currently running BT 020,
but haven't learned to trust them as much as I did the Tourances. My
next tires on the beast will be Metzeler Roadtec Z6, which are now
available in an R19 front... :)

- --
- - andrew, Berkeley, '00 R1150GS
- - "Moto per Mangiare, Mangiare per Moto"


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