Used tires?

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4 total messages Started by Par Willen Fri, 16 Apr 2004 11:00

#99790

Author: Par Willen
Date: Fri, 16 Apr 2004 11:00

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G'day,

Webwork finally paid off. The Swedish Harley Drags Association just gave
me a brand-spanking new Canon 300D as a thanks for the work on their
website so now you're all in trouble as I'll be pestering the ng with
race pics this upcoming season. This year I've also gotten a three
stepped header race exhaust, a 6-piston brake caliper, new chain, free
dynotime, plus mebbe some used tires.

The used tires: these tires are Pirelli high performance tires used in a
600 cc roadracing class. They're not slicks and the team in question
runs them one heat and then changes them out, in practice and testing
they run'em not an hour and then put on new ones. They are currently
down in Spain for geeting track mileage and there will be lots of used
tires out of those sessions.

The wear on these tires are pretty much all on the sides and the plan
was to use them on the UglyGlide for dragracing which should be pretty
much perfect, but being on a low-budget I figgered that maybe I can use
them for regular road riding as well.

Thread is there with lots of rubber left, the racers switch out the
tires on such short intervals due to the heat hardening the rubber out
on the very sides of the tires.

I assume these guys have quite different requirements for a tire than me
roadriding the FXR. It's not like it's a knee-dragging bike, is that
hardening really of any concern whatsoever for me even if I like to hit
the turns fairly hard?

Any input from the high-performance riders on the good or bad about
using these tires in regular riding on the street is much appreciated.

Regards
PiPPi
#66, BS#13, SENS

Re: Used tires?

#99836

Author: scottly@yahoo.co
Date: Fri, 16 Apr 2004 08:20

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Par Willen <NOSPAM@swipnet.se> wrote in message news:<c5o7dv$2vlec$2@ID-97880.news.uni-berlin.de>...
>
> Any input from the high-performance riders on the good or bad about
> using these tires in regular riding on the street is much appreciated.
>

If they are the DOT roadrace tires that we run here in the states, you
face several dilemmas...

A) They SUCK in the rain
B) They must come to operating temperature to function correctly
C)If the sides are significantly worn, the profile has changed and
handling characteristics are affected. (Much like running one that is
worn in the center)


Just my $.02 my Swedish friend.


MrScottly, the "ex-road racing junkie" Asshole #54

Re: Used tires?

#99965

Author: scottly@yahoo.co
Date: Fri, 16 Apr 2004 16:27

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Par Willen <NOSPAM@swipnet.se> wrote in message news:<c5ovqp$3svom$1@ID-97880.news.uni-berlin.de>...
>
> Do roadracers have limiting tire rules for the different classes?


Yes, absolutely. Euro rules are quite different from USA rules, as I
believe you guys run under FIM sanctioning and we run under AMA
sanctioning. I am not familiar with FIM, but in AMA Supersport classes
the tires have to be DOT (Department of Transporation) street legal
tires.  Basically, these tires have one rain groove cut in them every
so many inches to make them barely legal. They are great....on dry
road. In the rain, forget it.  Even though races are run in the rain,
if the riders know the rain is going to happen, they will switch to
better rain tires and take the DOT tires off.

In Formula 1 racing, the bikes run straight slicks on dry pavement.
Problem there is that a glass-full of water can dump you on your ass
if you hit it right.


>
> > B) They must come to operating temperature to function correctly
>
> Right again. I'll start each ride with a burnout.


Burnouts will not bring these tires to operating temp. They heat up
mucho slower than drag slicks.  If you watch road race events, in the
events where a warmup lap is not allowed, the crews use electric
heaters on the tires before the race.


MrScottly#54

Re: Used tires?

#99845

Author: Par Willen
Date: Fri, 16 Apr 2004 17:57

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MrScottly wrote:

> Par Willen wrote...
>
>>Any input from the high-performance riders on the good or bad about
>>using these tires in regular riding on the street is much appreciated.

>
> If they are the DOT roadrace tires that we run here in the states, you
> face several dilemmas...

Hm... These guys seem to be pretty serious so I don't assume these are
plain high perforamance street tires.

Do roadracers have limiting tire rules for the different classes?

> A) They SUCK in the rain

Right.

> B) They must come to operating temperature to function correctly

Right again. I'll start each ride with a burnout.

> C)If the sides are significantly worn, the profile has changed and
> handling characteristics are affected. (Much like running one that is
> worn in the center)

Right a fourth time. My understanding is that they are not worn but more
that they got hardened.

I'll get back on this when I get one of those tires so I know what the
exact model they are.

Thanks
PiPPi
#66, BS#13, SENS

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