World Superbike’s spec-tire contract with Pirelli comes to a conclusion after the 2015 season, and as such the Dorna WSBK Organization, in agreement with the FIM, has announced that it is taking bids from companies who are willing to be the sole-tire supplier of the World Superbike Championship from 2016 onwards. Interested parties will have to contact Gregorio Lavilla, the WSBK Sporting Director, and have their offers in by August 25th.
ADV riders and how-to junkies take note, the following is a video on how to MacGyver a motorcycle tire on and off a wheel, while using only zip ties — it might be the most impressive thing we’ve seen in a long while.
If you already own a set of tire irons, or even better a full-blown tire-changing machine, you can feel comfortable in your purchase-making decision, because they are by far the easier solution.
But for our readers who are on a budget or do a bit of touring, the following could keep you from being stuck on the side of the road, all for the tidy sum of $1 at your local hardware store.
The rain on Monday morning brought a welcome respite for tired journalists at least, after a night spent filing stories until the early hours of the morning. It meant that the Misano MotoGP test did not get underway until very late in the morning, with most riders staying in the pits until well after noon.
Once they got started, though, there was a lot to be tested. Both Yamaha and Honda had brought the latest versions of their 2014 prototypes for testing, but with the championship heading into its final five races, there was a lot to work on with the current crop of machines.
That was particularly true for Dani Pedrosa. The Repsol Honda man dropped from second to third in the championship at Misano, Jorge Lorenzo matching him on points, but taking the position on the basis of having more wins. Pedrosa has complained of a lack of rear grip almost all season, and if he is to retain a shot at the title, his team have to find a solution.
How quickly things change. Yesterday, it looked like Jorge Lorenzo had handed the 2013 MotoGP championship to Dani Pedrosa on a plate, by crashing unnecessarily at Turn 10, and bending the titanium plate he had fitted to his collarbone after breaking it at Assen.
Today, Pedrosa did his best to level the playing field again, by pushing a little too hard on a cold tire at Turn 1, and being catapulted out of the saddle in a cold tire, closed throttle highside. He flew a long way, and hit the ground hard, coming up rubbing his collarbone much as Jorge Lorenzo had done.
He was forced to miss qualifying, and for most of the afternoon, it looked like he too could be forced to miss the Sachsenring race, and possibly also Laguna Seca.
At the end of the afternoon, the medical intervention team – a group of experienced Spanish emergency doctors who spend their free weekends hooning around race tracks in hot-rodded BMW M550d medical cars – gave a press conference to explain Pedrosa’s medical situation, and what had happened that afternoon.
Dr. Charte and Dr. Caceres told the media that Pedrosa had a huge crash, had walked away feeling dizzy, and had been rushed to the medical center. There, he had one X-ray on his collarbone, but just as he was about to have a second X-ray, his blood pressure dropped dramatically. The second X-ray was immediately aborted as the medical staff intervened to stabilize Pedrosa.
He was then flown to a local hospital, where he had a cranial MRI scan and a CT scan of his upper body, which showed that he had sustained no major injuries, apart from a partially fractured collarbone.
A neurological test turned up no signs of concussion, and the drop in blood pressure was probably just due to the force of the impact, a typical symptom of shock. He returned to the track, where he was examined again, and nothing abnormal showed up in that exam.
Will Pedrosa race tomorrow? That will be decided in the morning, firstly by Pedrosa himself, who must decide whether he wants to undergo a medical test, and then by the doctors performing the fairly full medical test, including an extensive neurological exam, aimed at ruling out any signs of concussion or nerve problems.
Jorge Lorenzo’s disappointing performance at the French Grand Prix at Le Mans has been the cause of some debate. The factory Yamaha man finished a lowly seventh, his worst finish (other than DNFs) since his rookie season in 2008, and finishing off the podium for the first time since Indianapolis in 2011. To say this was an uncharacteristic performance from Lorenzo is something of an understatement.
So what went wrong? Immediately after the race, Lorenzo made it clear that he believed the problem was with his rear tire. He had had no grip whatsoever, and been unable to get any drive from his rear tire.
He told the press afterwards that the only logical explanation he could think of for his problems was a defective rear tire. Lorenzo had been fast in the morning warm up, though it was a little drier then, and the set up used was very similar to then. In 2012, Lorenzo had won at Le Mans by a huge margin, so he could not understand why he was struggling so badly in France.
Bridgestone naturally denied there had been a problem with Lorenzo’s tire. After the race Bridgestone officials told the press that they had examined the tire together with Yamaha engineers and found nothing wrong with it.
In their customary post-race press release, Bridgestone’s Motorsport Tyre Development Manager Shinji Aoki reiterated this stance. “As is always the case in these situations, his engineer thoroughly examined Jorge’s race tyres which were found to be in good working condition,” he is quoted in the press release as saying.
“In addition, I examined the tyre myself and personally discussed the matter with the Yamaha engineers and we all agreed that Jorge’s lack of rear grip was not attributable to his tyre.”
What do we know ourselves? Though nobody is saying anything other than official statements, there are still some clues we can piece together from the data available. The key fact is visible from the race footage, available to those with a MotoGP.com video pass on the official MotoGP website.
As is customary, the Bridgestone media service issued their post-race debrief on tire performance on Tuesday, in which they discuss how the tires they selected held up during the race at Le Mans the previous weekend. This week’s press release is more interesting than most, as it contains a denial from Bridgestone that there was anything wrong with the rear tire used by Jorge Lorenzo in the race on Sunday, countering claims that his tire was defective.
Speaking to the media after the race on Sunday, Lorenzo said that although he was not a tire engineer, he could think of no other explanation but a defective tire for the complete lack of rear grip he had suffered throughout the race. The setting they had used in the wet morning warm-up had worked well, Lorenzo said. In 2012, under similar conditions, he had not had a single problem, he explained, going on to win the race by nearly 10 seconds.
Continental has begun a voluntary recall for its ContiMotion line of sport-touring tires. Affecting 1,700 units in the market, Continental says the tires in question are sized at 180/60R16 and under certain conditions these tires may have uneven wear, groove cracking, and in some cases even belt lift.
It goes without saying that these circumstances would leave the tires unsafe for use, though Continental has not received any reports about accidents resulting from these conditions. Most affected by the situation are Honda Gold Wing 1800 owners, especially in cases where there has been over-loading and under-inflating of the tire.
World Superbike is in Italy this weekend, getting ready to race one of the fastest circuits on the WSBK calendar. Already hitting 205+ mph down the main straight at the first practice session (208.03 mph for Mr. Fabrizio), the Pirelli racing slicks also have to contend with sweeping fast corners at Autodromo Nazionale Monza.
Highlighting the heat, speeds, and stresses that its tires have to go through while racing at this beloved Italian circuit, Pirelli has put together a short video that outlines what the Italian tire company has to contend with at this special World Superbike round. Interesting stuff.
Bridgestone has announced that they are going to bring forward the introduction of a new 2012-spec front tire, and start allowing riders to use it starting from the Jerez round of MotoGP. The new tire was tested extensively during the pre-season, with versions tried at both Sepang tests and at the IRTA test at Jerez. The tire features a modified construction which allows it to heat up more quickly as well as provide more feedback to the riders.
The selected construction was one of two types tested during the pre-season. The two types – designated as “21″ and “24″ – differed only slightly, the central section being slightly less rigid in construction on the 21, when compared to the 24. The riders were positive about both types, but were split on which tire was best. The majority of the riders preferred the 21, praising it as having better stability and feedback. Surprisingly, the Honda riders took the opposite view, saying that it was the 24 which was the more stable tire, the 21 providing less stability under braking.
Pirelli will remain the sole-tire supplier for the World Superbike series through 2015, a continuation of the relationship begun between the Italian tire company and Infront Motor Sports in 2004. Along with supplying the Superbike class, Pirelli will continue to supply World Supersport, the Superstock 1000 FIM Cup, and the UEM Superstock 600 European Championship through the end of the 2015 season as well.
“We are delighted to be able to renew the contract with Pirelli until the completion of the 2015 season. Eight years of working together have provided results that go way beyond our highest expectations. Once again we can count on a tyre supplier, whose commitment to the product, service and development is second to none,” said Paolo Flammini, CEO of Infront Motor Sports.