This forum is the only place i have ever heard about the Michellin - Rossi tyre conspiracy. Interesting topic, I'm just curious about the source of it and how it came about?
Perhaps you should expand your reading in regards to tire advantages beyond this forum then my friend. It is not a myth, nor conspiracy, but a fact. The question is, is it still going on, in my opinion, it most undoubtedly is.
I understand your sentiment however, often labeling something "conspiracy" has the desired affect of convenience, an easy way to dismiss something, as you can see from the responses to your post. Facts are often passed off as conspiracy or myths, and vis verse. For example, like the myth that was debunked regarding Rossi’s legendary "development skill" over two years at Ducati, your posts reminds me of a quote from Casey Stoner who said:
“I just feel completely sorry for Ducati that Valentino has gone there and done nothing but complain about the bike for almost two years.”
“They ate their words from day one.”
“Jerry [Burgess] saying that it would take him 80 seconds to fix that bike and that it was a simple issue and now they have had almost two years and have not made any inroads.”
“Valentino obviously doesn’t want to push limits and ride a bike that is not perfect, he has admitted that.”
Bare with me AJV80, I'm getting to your question. I'm just building it so you can understand the validity of one of many sources that have made the privy to the 'fact' Valentino Rossi has enjoyed a tire advantage with Michelin. (Granted, Rossi's fans have a peculiar way of processing facts and myths, for example, it's 'fact' in their eyes that Marquez stole Valentino's title last year).
How important is a tire? Well, according to Rossi: "...it is the tyre that decides the race."
When Rossi started whining about his tires, it prompted Casey Stoner to say the following:
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"They [Rossi] can moan and whinge about it as much as they want, but it shows that [Michelin] has had such an advantage in the past. This season, they cannot bring a tyre in just for the race [and] it's a matter of relying on the company that supports you to do a good job."
Stoner was referring to the "conspiracy", as you label it, though Casey was referencing it as fact.
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This was back in 2007, and the episode that precipitated these quotes ultimately lead to the end of the tire war, Rossi was the only one allowed to switch in 2008, and the series instituted the single tire supplier in 2009 (both 08/09 resumed Rossi's run of titles "wins" that were 'interrupted' in 06/07.
When Rossi made a return to Yamaha, it was to restore the series in terms of viewership, given that Rossi's Ducati stint was detrimental to ratings. Rossi out of the podium positions was hurting the series where Dorna executives are most interested, the bottom line. When the greatest value of your business is the leverage to negotiate based on ratings, it's a nuclear threat for people to tune out because their favorite rider is out, the fact is most viewers of GP are Rossi fans. The pressure to artificially keep him competitive must be enormous, and Dorna are not inclined to maintain impartiality of authentic competition over losing money. This prompted Dorna to broker a return of Rossi to Yamaha, a manufacturer with a perennial success rate. That is, Dorna acted in effect as the sport agent for an individual competitor, going so far as to subsidize the contract. (Yamaha offered a considerable pay cut to Rossi (fact), for several reasons, not the least being at the time they didn’t want him back due to his toxic affect on a racing team, that hasn't changed even today in 2016).
Today, Michelin are again the tire supplier, a manufacturer with a history of instituting a performance system of their product as a function of a popularity contest. Perhaps they have changed their spots? You won't find a source like Stoner above referencing the fact that Michelin is again developing tires to suit Rossi. I can't find it now since Randy Mamola is no longer maintaining his blog for Alpinestars, but he had a quote that was in no uncertain terms, describing the fact Michelin provided Rossi "the good stuff." But the "coincidences" of artificially propping Valentino up and keeping him competitive again today are deafening. Take a look back to the preseason testing, where Lorenzo made the fateful mistake of making it public his initial lap domination was thanks to the tires, those tires were withdraw in short order resulting in Lorenzo having an uncharacteristic season, struggling in various conditions, including dry races. Rossi has been phenomenally competitive this year, but it wasn't always so, as the first iteration of Michelin's in preseason where he said he was worried for the season, saying that it would be bad for the championship if Lorenzo had a run away season, those tires were then withdrawn. For 2016, the tire development favoring Rossi is more a suggestion rather than confirmed fact, but it's no conspiracy theory that Michelin have conducted such a modus operandi for their approach to the championship. Michelin was brought into the championship after unceremoniously being terminated from a high profile series. Consider the optics of returning to a high profile series and not making Rossi competitive, the major reason they were terminated in the first place.
If you live in a glass house, don't throw rocks.