BIG/SLOW/COMFY - Page 2 - Sportbike Addicts

NYCSTRIPES · 05-12-2006, 04:10 PM

from the information I have received, the sidewall is never part of the contact patch.
Ken

High_Revs_17 · 05-12-2006, 04:28 PM

Quote:

Originally Posted by NYCSTRIPES

from the information I have received, the sidewall is never part of the contact patch.

Which make & model tire?

gottaducati · 05-12-2006, 05:34 PM

Quote:

Originally Posted by NYCSTRIPES

from the information I have received, the sidewall is never part of the contact patch.
Ken

its your bike - put an airplane wing on it for all i know but when i look at my rear tire every inch of that shit has touched the street at some point judging by the way it is colored so i cant logically agree that the sidewall isnt gonna get involved somehow.

but then again what do i know, i have motorcycle tires on my bike.....

IrocRob · 05-12-2006, 05:47 PM

The sidewall of an automotive tire will not become part
of the contact patch when that tire is mounted on a
motorcycle. A motorcycle does not weigh enough,
nor does it place loads on the tires in the same way that
cars do. On a motorcycle, if the sidewall has become part
of the "contact patch", it's time to stand up, because you've crashed.

NYCSTRIPES · 05-12-2006, 06:42 PM

Here is a website with more informaiton on the topic.
Ken
http://lifeisaroad.com/stories/2004/...eDarkSide.html

gottaducati · 05-12-2006, 07:25 PM

Quote:

Originally Posted by NYCSTRIPES

Here is a website with more informaiton on the topic.
Ken
http://lifeisaroad.com/stories/2004/...eDarkSide.html

i have to admit, he made a very convincing argument but i think my bike will look ridiculous if i tried to slap a set of eagle f1's on her.

btw, where the fuck is this guy getting car tires for 90$

NYCSTRIPES · 05-12-2006, 07:51 PM

check Mavis tires
http://www.mavistire.com/ProductCart/pc/_shopbysize.asp
205/60 r 16

***Cakes206*** · 05-13-2006, 12:28 PM

Quote:

Originally Posted by NYCSTRIPES

from the information I have received, the sidewall is never part of the contact patch.
Ken

Yea but car tires are flat treaded, bike tires are rounded. Theres a reason for that. It has to definitely change the steering characteristics. Unless its a drag bike.

IrocRob · 05-13-2006, 12:45 PM

This is a quote from the website:

QUOTE - How does it handle?
I am happy with it. It is very smooth and stable at high
speeds, and for me at least, at very low speeds (full
deflection turns for instance) it is an improvement over
the motorcycle tire. Basically, I've found it to be superior
in all conditions.

There are two areas of difference in feel:
It requires active counter-steering to put the bike in a
corner. The Valkyrie has always required a firm hand, and
this is not significantly different. The difference is that on
the motorcycle tire, once the bike was stable in a corner,
driver input on the handlebars is not really needed. The
bike will stay in the turn unless power is applied or
removed, or the terrain/surface of the road changes. With
the car tire, the counter-steering input is required the
entire time the bike is in the corner. If it is released, the
bike will straighten up on its own. Those of you that push
the twisties and know how to drag pegs (really know how
to turn) will understand it right away.
UNQUOTE

Remember that this is a heavy cruiser, not a sportbike;
hard parts may start dragging at 25-30° of lean angle.
Sportbikes can acheive 40-45° of lean angle.

High_Revs_17 · 05-13-2006, 02:04 PM

I wonder how that tire reacts in a off-camber, decreasing radius turn.

NYCSTRIPES · 05-13-2006, 02:20 PM

I will keep everyone posted

MPtotheFZ · 05-14-2006, 10:00 AM

It probally works fine. With race cars on an oval track they are always adjusting the cambver of the outside tires to make the car turn easier and faster in the turns. And when your leaning your bike your putting camber on the tires. I mean its a crusier and i doubt you'll be doing heavy leaning in turns.

Another guy i know was bitchin about how much a rear tire for that Valk costs, so anything that works that saves you some money. Good luck with it!

**FigNewTon** · 05-14-2006, 01:21 PM

Nice Ken...Good luck with it.

***Cakes206*** · 05-14-2006, 04:45 PM

Quote:

Originally Posted by MPtotheFZ

It probally works fine. With race cars on an oval track they are always adjusting the cambver of the outside tires to make the car turn easier and faster in the turns. And when your leaning your bike your putting camber on the tires. I mean its a crusier and i doubt you'll be doing heavy leaning in turns.

Race cars are different, they have that option of adjusting the camber so that along with the indipendent suspension, the tire's full tread is flat on the ground when turning, hitting bumps, etc. Can't do that on a bike. Which is why we have to lean hence curved tires.

This is a great discussion btw.

NYCSTRIPES · 05-14-2006, 05:18 PM

Granted the guys who like the mod are somewhat biased, there is some good information here. For my part, it's worth the $80 investment to give it a whirl. That said, I wouldn't be taking my girlfriend on the bike again until I am confident the bike handles correctly after making the mod.
If the car tire does not work out, I am out some precious saturday project time and $80. I have done far worse with $80 in my time. If it works out, it'll look pretty cool.
Ken
MORE INFOhttp://www.valkyrieriders.com/shoptalk/CarTire/home.htm