Almost Smoked Tires - Sportbike Forum: Sportbike Motorcycle Forums
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post #1 of 34 (permalink) Old 07-07-2000, 02:46 AM Thread Starter
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I'm runnning D207s. Yesterday, the rear
tire started slipping alot. I am very
very close to the tread wear indicators.
Checked all the normal things... pressure
etc.. Everything is fine. The tire is
maybe a month old. Has anyone else noticed
that when you get down to the end of the
tire but NOT through the top ply that these
things loose traction?? I almost bought it
yesterday and I trying to figure out why??
The tire was warmed up too.

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post #2 of 34 (permalink) Old 07-07-2000, 02:59 AM
 
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Chris,


I'm NOT goofin with you or anuthing, but...D207s are FAMOUS for sliding...The reason they make a great tire is that they SLIDE and don't break loose like some lesser quality tires....Just what I've heard!!
................Jimmy G......................

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post #3 of 34 (permalink) Old 07-07-2000, 03:29 AM Thread Starter
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I know about that bro, they are known very
well for their predictable slide.. This one
was not predictable it was very un called
for... I'm thinking that it's b/c the
tread is almost gone but I have never
expirienced this before so I was hoping
someone could set me straight if they have
had a similar expirience.... or they know
something I don't about tires which is very
possible with all the racers here.

Thanks though!! Chris



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post #4 of 34 (permalink) Old 07-07-2000, 12:11 PM
 
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Chris, come on man, what do you think is gonna happen.

Get a new set of same Tires and you will be all set.

Tires age like everything else. As the tires ages, the rubber changes its characteristics. I dont see anything very odd here as it sounds like you push hard on "the envelope" when you ride. Ride like that alot and you will break the envelope someday. Get fresh meats before those tires let you down for real.

I dont ride THAT hard so i (and many others here) dont need to worry about how long our tires maintain a nice predictable slide.



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post #5 of 34 (permalink) Old 07-07-2000, 01:22 PM
 
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Chris,

It has something to do with flexibility. As you wear the tread it flexes less, because there is less there or something like that. Plus I doubt the tread at the end of the tread life is made as sticky as the tread when new. Someone once explained it all to me when I asked the same question about car tires and it made sense. Really when you ride as hard as you do, you really shouldn't go all the way to the tread bars.

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post #6 of 34 (permalink) Old 07-09-2000, 11:32 PM
 
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Chris
I have nooticed the same thing on several occasions as the tyres wear down. I have had to change tyres many times in the past when they were nowhere near the wear markers. I believe that only the outer 3-4 mm on a high peformance tyre is grippy and as you approach the carcass, it becomes harder and less grippy. The R1 will really show up this tyre characteristic, more so than lesser powered bikes. I was getting wheelspin in the dry and when the tyres were warm on my last set of tyres after just 1600 miles (including 2 trackdays and a few dyno runs) and had to change them.
Don't know the physiscs behind it but I believe it certainly has to do with the flexibility of the tyre diminishing as wear increases.

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post #7 of 34 (permalink) Old 07-10-2000, 05:41 AM
 
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Tires also have a limited amount of heat cycles before they start to loose their grip. The composition of the rubber will be compromised as the tire continually heats up and cools down. I suggest that once you start riding on the new tires that you never stop. Blow all stop signs and traffic signals. Have someone stand on the side of the road with a gas can and have them hand it off to you as you ride by. Discard the empty can on the side of the mountain because you don't really care about littering you scumbag prick! Then get pulled over for doing 80 in a 45mph zone because of your bad karma from the afore-mentioned can tossing affair. Get new tires you cheap bastard!

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post #8 of 34 (permalink) Old 07-10-2000, 05:57 AM
 
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Chris,

I'm not sure but I think it has something to do with the poor handling characteristics of the R1.

I'm just kidding of course. I would say that predictability does deminish somewhat with tread life.

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post #9 of 34 (permalink) Old 07-11-2000, 02:15 AM Thread Starter
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<BLOCKQUOTE><font size="1" face="Aril, Helvetica, sans-serif">quote:</font><HR>Originally posted by cbr600f4gd:
Tires also have a limited amount of heat cycles before they start to loose their grip. The composition of the rubber will be compromised as the tire continually heats up and cools down. I suggest that once you start riding on the new tires that you never stop. Blow all stop signs and traffic signals. Have someone stand on the side of the road with a gas can and have them hand it off to you as you ride by. Discard the empty can on the side of the mountain because you don't really care about littering you scumbag prick! Then get pulled over for doing 80 in a 45mph zone because of your bad karma from the afore-mentioned can tossing affair. Get new tires you cheap bastard!

<HR></BLOCKQUOTE>

Too much coffee again Geoff?


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post #10 of 34 (permalink) Old 07-11-2000, 02:18 AM Thread Starter
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This wasn't a slow diminish, this was one
day - Traction good - next day - traction
bad.

It seems the tire is hard as a rock!


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