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Bridgestone investigate Dani Pedrosa tyre issue

Joined Jun 2006
2K Posts | 20+
south wales UK
Ok i knows it a mcn article but that aside...are the control tyres as consistant as they should be?

i was thinking since qatar there have been complaints about some tyres not working the same as the previous selection, i know things come into play like changes in the track/temps, weather and bike setup but There has been different outcomes for different riders using the same rubber, What do you guys think about this... isit some of the changes listed above or a flaw in bridgestones manufacturing of the tyres?


STORY: Dani Pedrosa will find out the result of a Bridgestone investigation in Jerez this weekend after the Spaniard managed to claim a podium finish in the Japanese GP, despite serious front tyre wear.

An immediate investigation was launched after the Repsol Honda rider finished third in the Twin Ring Motegi clash, despite problems with his choice of medium compound front Bridgestone tyre.

Pictures showed the triple world champion’s front tyre was badly chunked and Tohru Ubukata, Bridgestone Motorsport’s Manager of Motorcycle Race Tyre Development, said: “We did see some problems with Dani Pedrosa’s medium compound front Bridgestone tyre after the race.

"All the other tyres that were used during the weekend, and this season, performed well so we can say this is a problem isolated to just this one tyre, but of course we have already taken the tyre to our technical centre in Tokyo where we are investigating the problem in detail.

"I would like to apologise to Dani and the Repsol Honda team, but we saw that despite the problem the front Bridgestone continued to perform until the end of the race and I am happy that Dani finished a great ride in third position.”

It is known that Honda also had severe front-end tyre issues during the first race in Qatar earlier this month. Pedrosa slipped back from sixth to eventually finish 11th, while Repsol Honda team-mate Andrea Dovizioso had to settle for fifth after initially running in third.

Honda bosses told MCN during last weekend’s Twin Ring Motegi race that one of the big problems with the 2009 factory RC212V was its heavy wear on front tyres.

Both Pedrosa and Dovizioso have also complained of the bike having balance and weight distribution issues, which have contributed to aggressive wear of front and rear tyres
 

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Well if they are all pretty much on a control tire here it has to be that the honda just is eating those tires. What else could it be at this point?
 
<div class='quotetop'>QUOTE (ROCKGOD01 @ Apr 29 2009, 02:09 AM) <{POST_SNAPBACK}><div class='quotemain'>Well if they are all pretty much on a control tire here it has to be that the honda just is eating those tires. What else could it be at this point?


yes it could be that but in qatar a few riders were left scratching there heads because the tyres they used all weekend did not perform the same on raceday and destroyed after a few laps mainly the suzuki guys but others to.

i was just asking what you guys think about this, im not trying to create conspiracy's im just wondering if bridgestones tyres are as controlled as they should be?

nevermind im just killing time until the next race...
 
<div class='quotetop'>QUOTE (jazkat @ Apr 29 2009, 02:20 AM) <{POST_SNAPBACK}><div class='quotemain'>yes it could be that but in qatar a few riders were left scratching there heads because the tyres they used all weekend did not perform the same on raceday and destroyed after a few laps mainly the suzuki guys but others to.

i was just asking what you guys think about this, im not trying to create conspiracy's im just wondering if bridgestones tyres are as controlled as they should be?

nevermind im just killing time until the next race...
No I get it. I was just saying that because they are the same it must be the bikes.
 
I agree with ya Rock. Sounds like it a problem with the latest HRC has to offer or they still don't have <strike>Hayden</strike> the settings right.
 
I'll bet the Microbot needs to run the suspension on the firm side, so as to beat some temperature into the tires. Maybe HRC would have been better off with a normal sized rider, eh?
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I hope the rubber is going to be consistent. The control tire in WSBK is clearly inconsistent. Suzuki claims that Capirossi did get a bad tire on his machine in Qatar as already stated.
 
<div class='quotetop'>QUOTE (jazkat @ Apr 29 2009, 09:20 AM) <{POST_SNAPBACK}><div class='quotemain'>yes it could be that but in qatar a few riders were left scratching there heads because the tyres they used all weekend did not perform the same on raceday and destroyed after a few laps mainly the suzuki guys but others to.

i was just asking what you guys think about this, im not trying to create conspiracy's im just wondering if bridgestones tyres are as controlled as they should be?

nevermind im just killing time until the next race...

It looks like Bridgstones after securing the contract of supplying tires to MotoGp class sits back and relaxes..there isn't any god damn michelin to compete with. Isn' it? why should the jap wastes money on new development in this turbulent time?
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who care about dany after all..he got puig and switched to stone half way last year..
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LINK

Wow, I expected Babel to be all over this. He is the resident tire expert of the forum after all.



....Oh I know why he missed it, it didn't involve some excuse for Rossi.
<



Anyway, how impressive is Peder's podium now?
 
<div class='quotetop'>QUOTE (Jumkie @ Apr 28 2009, 09:35 PM) <{POST_SNAPBACK}><div class='quotemain'>LINK

Wow, I expected Babel to be all over this. He is the resident tire expert of the for after all.



....Oh I know why he missed it, it didn't involve some excuse for Rossi.
<



Anyway, how impressive is Peder's podium now?

That's nuts. I never saw the race, but man that is crazy. Another lap and Dani could have DNF'd. After seeing that, I change my mind to it being Bridgestones fault.

That photo is ....... scary!
 
<div class='quotetop'>QUOTE (Jumkie @ Apr 29 2009, 04:35 AM) <{POST_SNAPBACK}><div class='quotemain'>LINK

Wow, I expected Babel to be all over this. He is the resident tire expert of the forum after all.



....Oh I know why he missed it, it didn't involve some excuse for Rossi.
<



Anyway, how impressive is Peder's podium now?

thanks for the bigger pic jum hopefully now the guys can see what i mean.. i know rubber gets feathered and shreds a little but that tyre is taking the piss.

surley that isnt wear from the bike, that thing is falling apart in chunks. I thought the suzuki riders comments after the qatar race were odd and dovi's..... i did post about it in 2 other threads so this just add's to my question.... are the control tyres consistant?

and hats off to dani for taking the machine race distance.
 
<div class='quotetop'>QUOTE (jazkat @ Apr 29 2009, 01:20 AM) <{POST_SNAPBACK}><div class='quotemain'>yes it could be that but in qatar a few riders were left scratching there heads because the tyres they used all weekend did not perform the same on raceday and destroyed after a few laps mainly the suzuki guys but others to.

i was just asking what you guys think about this, im not trying to create conspiracy's im just wondering if bridgestones tyres are as controlled as they should be?

nevermind im just killing time until the next race...
I understood the tyres were allocated at random so bridgestone presumably cannot be selectively giving certain riders or teams dodgy tyres, but it is entirely possible that the tyres suit some bikes or riders better than others, or that the randomly allocated tyres vary in quality.
 
<div class='quotetop'>QUOTE (Jumkie @ Apr 29 2009, 05:35 AM) <{POST_SNAPBACK}><div class='quotemain'>LINK

Wow, I expected Babel to be all over this. He is the resident tire expert of the forum after all.



....Oh I know why he missed it, it didn't involve some excuse for Rossi.
<


How about me being in the middle of the North Sea on a Ship.
I'm stuck here for the next 14 days with very limited communications. Just heard the 1-2MB satelite link cost them about $20 000/month. Only fair that I start using it to the fullest.
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The tires should be very alike, but it will depend greatly on bach number, batch homogenety, manual handling involved... I think Michelin hand made all the tires, but as BS now have realativly large series of the same tires they might put it on an automated line, but I doubt it. From what I've heard from the tire industry it's a lengthy process to change a production line from one model to the other. Pirelli at least used to produce SS600 tires once or twice a year.
 
Also important to get proper heat soak through the tyre before punishing them. Warmers should have basically cured that problem.
Credit to Pedro, although he probably didn't know how bad it was until he stopped. Would have been easy to drop the front.
 
<div class='quotetop'>QUOTE (jazkat @ Apr 29 2009, 11:00 AM) <{POST_SNAPBACK}><div class='quotemain'>Both Pedrosa and Dovizioso have also complained of the bike having balance and weight distribution issues, which have contributed to aggressive wear of front and rear tyres


Having discussed this on previous forums I will briefly outline what was said.

The Yamaha and Ducati (using B'Stones) in 2007/2008 show a significant rearward weight bias, with the triple clamps pushing the front wheel away from the rider and the swingarm as short as possible to bring the rear wheel "under" the bike (for maximum traction).

It makes the front as loose as hell, which you can see in the race on Stoner as well as Rossi and Jorge's bike, but not so much on the Hondas.

Aus MC News showed some great photos of this in 2008 along with rather cogent explanations.

It may be the case the Honda hasn't fully worked out the Yamacati method of making Bridgestone’s complement the bike just yet.
 
<div class='quotetop'>QUOTE (Jumkie @ Apr 29 2009, 04:35 AM) <{POST_SNAPBACK}><div class='quotemain'>LINK

Wow, I expected Babel to be all over this. He is the resident tire expert of the forum after all.



....Oh I know why he missed it, it didn't involve some excuse for Rossi.
<



Anyway, how impressive is Peder's podium now?
Still think control tyre is a good idea ?

This is where it is going to get very expensive for some teams if they have to re design a bike to suit the tyres. Reading between the lines it looks like an issue with the rc212v, a few seasons ago the tyre company would have just made a different tyre for it but thats not the case now.
Dani battled hard with rossi then appeared to drop off the pace. we now know why, impressive podium all thong considered
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<div class='quotetop'>QUOTE (Andy Roo @ Apr 29 2009, 08:58 AM) <{POST_SNAPBACK}><div class='quotemain'>Having discussed this on previous forums I will briefly outline what was said.

The Yamaha and Ducati (using B'Stones) in 2007/2008 show a significant rearward weight bias, with the triple clamps pushing the front wheel away from the rider and the swingarm as short as possible to bring the rear wheel "under" the bike (for maximum traction).

It makes the front as loose as hell, which you can see in the race on Stoner as well as Rossi and Jorge's bike, but not so much on the Hondas.

Aus MC News showed some great photos of this in 2008 along with rather cogent explanations.

It may be the case the Honda hasn't fully worked out the Yamacati method of making Bridgestone’s complement the bike just yet.
yes, i remember looking at the difference in rossis m1 before and after the tyre switch.
 
<div class='quotetop'>QUOTE (roger-m @ Apr 29 2009, 06:13 PM) <{POST_SNAPBACK}><div class='quotemain'>yes, i remember looking at the difference in rossis m1 before and after the tyre switch.


I was never a fan of the single tyre rule. Never will be either.

Now what we had was a Michelin domination, then in line with the underlying philosophy of a prototype class someone came up with something better (B’stone/Ducati).

Now we have this faster style (rear weight bias etc) it has created a dominant riding style and design philosophy.

I think the world of motorcycle racing would have been better IF somebody tried to think of a faster way again and the competition would have created and nurtured differing design philosophies.

What we have now is 5 manufacturers trying to build the same motorcycle, a very expensive version of the R1 cup. (Do not take that too literally).

What I am saying is that a degree of innovation has been taken away, now everyone has to build a Ducati or Yamaha clone.
 
<div class='quotetop'>QUOTE (Andy Roo @ Apr 29 2009, 09:43 AM) <{POST_SNAPBACK}><div class='quotemain'>I was never a fan of the single tyre rule. Never will be either.

Now what we had was a Michelin domination, then in line with the underlying philosophy of a prototype class someone came up with something better (B’stone/Ducati).

Now we have this faster style (rear weight bias etc) it has created a dominant riding style and design philosophy.

I think the world of motorcycle racing would have been better IF somebody tried to think of a faster way again and the competition would have created and nurtured differing design philosophies.

What we have now is 5 manufacturers trying to build the same motorcycle, a very expensive version of the R1 cup. (Do not take that too literally).

What I am saying is that a degree of innovation has been taken away, now everyone has to build a Ducati or Yamaha clone.
i know what your saying andy, we have prototype racing without prototypes.
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