Bridgestone have added two new tires to their 2015 allocation, in response to developments in 2014. A new extra-hard rear will be made available at a few of the more abrasive circuits on the calendar, while the asymmetric front, debuted at Phillip Island last year, will also be available at more tracks.
Two new tires means two new color codings, to distinguish them from the existing allocation of tires. The extra hard rear will carry a yellow stripe around the side, while the asymmetric front will be indentifiable by a light blue band on the sidewall. The existing color codings for the remainder of the tires remain unchanged, as shown in the tire chart and table below.
The extra hard tire is to be introduced in Argentina for the first time, where the circuit proved to be tough on tires. Both Argentina and Indianapolis are extremely abrasive, and placed heavy demands on the hard compound rear tire. Whether all the riders will use the extra hard at the circuits remains to be seen. On the three occasions when riders could use the harder of the two compounds, only Marc Márquez and Dani Pedrosa selected the harder tire, the rest of the field having chosen the softer option. As Ducati, Suzuki and Aprilia all have the so-called Factory 2 concessions (softer rear tires, more fuel, more engines, free testing and development), they will not have the tire available to them at all.
The asymmetric front tire will see more use. Trialed at Phillip Island last year, reception of the tire was mixed, though this was more due to the temperature dropping rapidly halfway through the race. Under more consistent temperatures, the asymmetric front should help at circults like Phillip Island which heavily favor one side of the tire. The biggest difference could be seen at the Sachsenring, where a lot of riders get caught out by Turn 12, the first right hander after a series of lefts. Turn 12 is very fast, off camber and over a crest, and grip is at a premium.
Bridgestone's new tire markings are below:
The press release issued by Bridgestone on the new tires is show below:
Bridgestone revises slick tyre marking system for the 2015 MotoGP™ season
Thursday, March 19 2015
Following a successful debut of a new MotoGP™ slick tyre marking system in 2014, Bridgestone has introduced new colours to its tyre line-up in 2015 to reflect new tyre developments being made available to riders this year.
The revision to the tyre marking system has been the result of more options of slick tyre being offered by Bridgestone this season, as the Official Tyre Supplier to MotoGP™ continues to pursue development of race tyres that offer enhanced safety, durability and performance.
Alongside the four coloured markings used last year; green (extra-soft), white (soft), black (medium) and red (hard), two new slick tyre colours are added to this year’s classification scheme. A new extra-hard compound rear slick will make its debut at the Argentina round of the championship due to the severe nature of the Termas de Rio Hondo circuit, and this new development will be distinguished by a yellow stripe. Bridgestone has continued development of its asymmetric front slick that was introduced in the closing stages of the 2014 season, and this year will offer this option at more circuits in various compound combinations. As only a maximum of one type of asymmetric front slick will be offered at a given round, these will be marked with a light blue stripe to help distinguish this option against the symmetric front slicks on offer.
The complete list of coloured slick tyre markings for the 2015 MotoGP season is:
Same as 2014
Additional colours for 2015
As per last season, in 2015 two options of wet tyre will be offered at each round, and will adopt a marking system where the plain, black tyre denotes the harder option, and a white stripe will mark the softer option.
Hiroshi Yamada – Manager, Bridgestone Motorsport Department
“The coloured tyre marking scheme we implemented last year was designed to make it easier for fans to see which tyre options we deliver at each race, and we’ve listened to the feedback from both MotoGP fans and media around the world to improve this system for this year. This revised tyre marking system not only reflects Bridgestone’s commitment to continue developing new tyres through the 2015 MotoGP season by offering more options to riders, but also helps increase the appeal of the sport by helping fans more clearly understand the importance of tyre strategy during the race weekend.”