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Hirohide Hamashima comments on Indianapolis MotoGP

Assistant to director at Bridgestone’s Motorsport Tyre Development Division, Hirohide Hamashima, has commented that the poor performance of the supplier’s harder rear option on the relayed, slippery Indianapolis track in practice was a reasonable trade-off for the durability it would give riders during the race. However, he also said that the company would analyse tyre performance carefully and reassess for next year’s tyre selection at the venue.

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Bridgestone previews San Marino MotoGP

The MotoGP paddock travels from Indianapolis last weekend to Rimini and the Adriatic Coast for the San Marino Grand Prix on 4 September. The Misano World Circuit is twisty and quite stop-start in nature, although there is a very fast section from turns ten to thirteen. Consequently riders spend a lot of time on the brakes meaning that braking stability from the front Bridgestone tyres is crucial. Confidence in rear grip is especially important through turns six, ten and sixteen, which all lead onto sections of straight.

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Stoner tyre management the deciding factor on new Brickyard surface

Casey Stoner and the Repsol Honda Team delivered a masterclass in consistency and tyre management in particularly tricky conditions to extend the Australian’s MotoGP championship lead to 44 points at the high temperature, newly resurfaced Indianapolis Motor Speedway. He was followed across the line by teammate Dani Pedrosa in second and Yamaha Racing’s Ben Spies who recovered excellently having dropped to ninth to climb onto the podium for the third time this season.

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Semi-resurfaced Indianapolis circuit poses Bridgestone challenge

With 1.5miles of the 2.6mile Indianapolis circuit recently resurfaced, the twelfth round of the 2011 MotoGP season will pose a new challenge for Bridgestone’s tyres, though Hirohide Hamashima, assistant to director in the company’s motorsport tyre development division is unworried. Speaking as the company confirmed its allocations would remain the same as last season’s visit to the Brickyard, Hamashima said: “Reports are that IMS have done a great job resurfacing the circuit which will make for more consistent conditions this year. It won’t change the physical demands placed on our tyres, because the corners are still the same and haven’t been re-profiled, so we haven’t changed our compound selection from last year other than with the addition of the third spec of front tyre with the new regulations.

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MotoGP tyre regulation changes crucial for cold conditions

The Czech Republic Grand Prix weekend saw the introduction of a change in the regulations for tyre allocation, giving riders one more front slick tyre each, a third softer compound option and greater choice of both front and rear slick compound allocation. Bridgestone motorsport tyre development general manager Tohru Ubukata commented that while the weekend had not shown the true impact the regulation changes should have, it had provided a good trial run for riders and teams, The new rules are designed to provide softer compounds for increased safety in cold weather. Ubukata said the impact on the company was purely in increasing the number of tyres it must now bring to each Grand Prix. The tyre supplier also took the opportunity to continue the development of its 2012 tyres, “designed for the new 1000cc engine regulations”.

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Bridgestone rubber helps decrease Brno MotoGP race time as Stoner wins

Casey Stoner clinched his sixth victory at Brno on Sunday following an early battle with teammate Dani Pedrosa and Jorge Lorenzo. Pedrosa crashed out of the lead on the third lap, leaving the remaining two steps of the podium to be fought over by Andrea Dovizioso, who finished second, and Marco Simoncelli who secured his first podium in the premier class. Every rider on the grid used the softer option rear tyre for the race, and almost all riders used the harder option front. The only riders who didn’t were Suzuki’s Álvaro Bautista, who was chasing down Valentino Rossi for sixth position when he crashed out, and Lorenzo, who led early on before crossing the finish line fourth ahead of his Yamaha teammate Ben Spies.

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Brembo races to North American supply deals

Brembo Racing and Roush Yates Performance Products announced the start of a partnership in North America, with the latter appointed as an authorised distributor of Brembo Racing high-performance brakes and accessories for the “Oval market”, including series such as Nascar. In additional motorsport news, Brembo has also been made the official supplier of Truck Sport Lutz Bernau (TSB) team at FIA European Truck Championship, marking the brake manufacturer’s entrance in the segment of racing trucks races. On the non-motorsport side Brembo, headquartered in Italy with plants in 15 countries, has also signed an agreement to acquire Perdriel SA, an Argentinian manufacturer of brake discs with plants in the Buenos Aires area, a workforce of about 150 and expected revenues of about €20 million.

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Stoner consistency the key to US MotoGP victory

Casey Stoner used the harder compound Bridgestone slicks to climb from third and take a decisive victory at Laguna Seca in MotoGP’s US Grand Prix. Jorge Lorenzo and Dani Pedrosa’s early pace faded in the latter stages, and Stoner’s ascent to the lead in lap 27 of 32 proved decisive. Hirohide Hamashima, assistant to director of Bridgestone’s Motorsport Tyre Development Division said: “The harder option front and rear slicks were clearly the faster options today and, especially in the case of Casey, consistency was impressive. Whilst his fastest lap was a few tenths off the lap record, the total race time was 2.7 seconds faster than the previous record which is a very good indication of consistency and durability.

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Bridgestone seeks US MotoGP performance upgrade

MotoGP tyre supplier Bridgestone is taking a softer rear compound to the US Grand Prix this weekend in the hope that they will provide a further performance improvement to that of the asymmetric rears Bridgestone supplied to west coast California’s Mazda Raceway Laguna Seca last year. Hirohide Hamashima – assistant to director, Motorsport Tyre Development Division explained: “Last year at Laguna we saw an improvement in tyre performance when we selected our asymmetric rear slicks for the first time in the single supply era there, and I hope by choosing softer rear compounds this season we will see another step forward in performance.

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MotoGP: Friday falls “unfortunate”, Pedrosa sets German GP record

After MotoGP’s German GrandPrix Friday morning practice session, it looked like Bridgestone may have some explaining to do, with some of the sport’s fastest riders experiencing falls after losing grip. Assistant to director, Motorsport Tyre Development Division, Hirohide Hamashima told the press that unusually cold conditions during the session, coupled with the course’s modest quota of three right-hand corners, had combined to leave riders with little heat in the right side of their front tyres. The tyre supplier brought hard and extra hard front and medium and hard asymmetric rear slicks for the weekend, which Dani Pedrosa used to set new lap and total race time records on the Sunday in his second race since returning from injury. Pedrosa, Jorge Lorenzo and Casey Stoner spent the race locked in a three-way battle for the lead, ahead of a three-way battle for fourth and a four-way battle for seventh, keeping the 101,309 race-day fans thoroughly entertained.

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Bridgestone to make more preferred tyres available in MotoGP

Bridgestone has announced a proposed revision to its tyre allocation procedure and selected tyre compounds for the remaining races of the 2011 MotoGP season, effective from the Czech Republic Grand Prix. The supplier worked with the Safety Commission – on which riders, FIM, IRTA and Dorna are represented – to decide on the proposal in response to rider feedback. Bridgestone has in the last 18 months developed and introduced its extra soft compound in 2010 and selected softer tyre compounds for the Catalunya, British, Dutch, Italian and German Grands Prix so far this year. The US Grand Prix at Laguna Seca next weekend will see softer rear slicks introduced to attempt to improve warm-up performance, especially as the morning sessions can be cool.

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Lorenzo victorious on hard compound at Mugello

Jorge Lorenzo won the latest Italian MotoGP round using Bridgestone’s hard front and rear slicks, overcoming Casey Stoner’s early lead of 2.3 seconds. He also set a new lap record at Mugello, while Championship leader Stoner also lost out to Andrea Dovizioso in the final six laps, allowing the Italian to achieve his best result of the season in front of a home crowd. Round seven’s winner Ben Spies got the better of Marco Simoncelli for fourth position, ahead of Valentino Rossi who finished sixth having climbed from 12th on the grid.

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Hamashima clarifies MotoGP tyre issues at Dutch TT

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The assistant to director at Bridgestone’s Motorsport Tyre Development Division Hirohide Hamashima has released a statement discussing events at the Dutch TT last weekend. The event was lively from a tyre point of view, with riders disagreeing over whether to have the manufacturer supply new rear slicks before the Saturday practice and race – in the end they stuck to the original tyres – and cold conditions creating problems as riders chose to run a softer compound that was more susceptible to graining. Track temperatures were 29 degrees Celsius cooler than in 2010, while rain interrupted running every day and left the circuit very greasy.

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Related news:

  1. Lorenzo Sets Records on Asymmetric Rear at MotoGP US Round
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Spies seals first win in difficult Assen MotoGP conditions

Slight residual dampness on the Assen track made the start of MotoGP’s round seven race vital, as several riders fell foul of conditions, but it was not enough to prevent Ben Spies taking his first MotoGP victory, controlling the race from the front to romp to an eventual 7.7-second lead over second-placed Casey Stoner and his Repsol Honda teammate Andrea Dovizioso. Bridgestone Motorsport manager Hiroshi Yamada congratulated Spies on becoming the tenth rider to claim a premier class MotoGP victory on the manufacturer’s tyres.

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Bridgestone in Netherlands for MotoGP’s Dutch TT

Round seven of the MotoGP World Championship is the Dutch TT at Assen, one of the longest-standing races on the calendar and a race with great history in motorcycle racing. The 81st TT Assen weekend starts on 25 June, and marks the 62nd time the race had appeared on the Grand Prix calendar having been included every year since 1949. MotoGP tyre supplier Bridgestone will take its front soft and medium compounds and its asymmetric medium and hard rear tyres to Assen for the Dutch TT.

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