INTRODUCTION The new, the ultimate combination of easeful touring performance and sporty performance Created in response to motorcyclists wanting touring tires that deliver reassuringly consistent and comfortable performance on both wet and dry surfaces yet still offer plenty of fun, the new sport touring radials redefine riding pleasure and safety. It builds on the acclaimed 's quick response and superb stability to deliver more traction and control, particularly on wet surfaces, through the use of new-formula compounds and re-engineered designs. Try the new and discover the world of advanced sporty touring. 2
PRODUCT POSITIONING 1000cc 600cc 400cc Race Sports Touring Adventure Sport touring radials for motorcyclists seeking more performance, durability and peace of mind. Specifically engineered to maximize performance on both dry and wet surfaces. 3
DEVELOPMENT Product concept Sport touring radials that deliver the ultimate combination of peace of mind, performance, versatility and excitement Technical aims Aim of development Maintain the 's superb dry-condition performance while upgrading its wet-condition performance Method Improved wet-condition grip with no sacrifice to dry-condition performance Improved water channeling within the contact patch Technical elements New-formula compound Modified tread pattern 4
Handling / stability ADVANTAGES Main feature A superior combination of sporty dry-condition handling and reassuring wet-condition performance Significantly improved wet-condition performance with no sacrifice to the 's superb dry-condition performance and durability Wet-condition performance Benefits Sporty, neutral handling Superb line-holding precision Surefooted leans Reassuring wet-condition performance 5
REAR TIRE'S IMPROVED PATTERN (NEW) Rotation Sub grooves extended to the center strip for increased water channeling in the contact area Surefooted traction on wet surfaces Curved grooves shifted outward to create a wider rib along the center strip for greater tread stiffness New Increased stability when accelerating 7
Contact area REAR TIRE'S IMPROVED PATTERN (NEW) Change in contact area Lean angle Contact area increases with lean angle, for increased grip when cornering Faster cornering Surefooted feel when cornering Greater safety 8
CONSTRUCTION Front Rear Rotation Same design as that of the, to maintain the predecessor's superb dry-condition performance Benefits Great handling and stability on dry surfaces Sportier, more exhilarating performance when touring 9
ENHANCED WET-CONDITION PERFORMANCE (NEW) Redesigned sub grooves provide enhanced water channeling New-formula compound provides greater grip, particularly on wet surfaces Longer sub groove Enhanced water channeling Greater safety Greater versatility Fewer travel restrictions Contact patch Test conditions Bridgestone Proving Ground Wet handling track Vehicle: Suzuki GSF 1250S 120/70ZR17M/C / 180/55ZR17M/C Water depth: 2.0mm Speed: 40km/h Pressure: Front: 250kPa Rear: 290kPa Contact patch 10
Friction coefficient Avg. lap time Wet braking distance (index) ENHANCED WET-CONDITION PERFORMANCE (NEW) Friction coefficient on wet surfaces (rear) Avg. lap time on wet track (8 laps) 110 100 90 9% quicker Braking distance on wet surface (30 to 0 km/h) 110 100 90 9% shorter 80 80 70 70 4% higher friction coefficient 60 50 60 50 Slip ratio (%) Test conditions (wet lap times) Bridgestone Proving Ground wet handling track Vehicle: Suzuki GSF 1250S 120/70ZR17M/C, 180/55ZR17M/C Water depth: 2.0mm, Pressure: Front: 250kPa, Rear: 290kPa Test conditions (braking distance) Bridgestone Proving Ground wet straight Vehicle: Tricycle test vehicle 180/55ZR17M/C Water depth: 1mm Pressure: 290kPa New-formula compound increases friction on wet surfaces Actual wet track testing at proving grounds indicates faster lap times Shorter braking distances afford greater safety in the rain Track data indicates improved performance and greater safety on wet surfaces 11
Grip NEW-FOMULA COMPOUND AND PATTERN (NEW) Increased grip of the new-formula compounds Newly developed front compound Newly developed compound adopted for rear tire's center strip Great performance on wet surfaces with no sacrifice to dry-condition performance or wear life Wider operating range Front Single-layer compound Rear 3LC Dual Compound NOTE: Rear only New formula compound for front Change in grip (front) Grip was improved in all working temperature range Tire temperature 12
PERFORMANCE Performance (score index) Straight-line stability Line tracing Wet traction 130 120 110 100 90 80 70 60 Wet slide control Wet grip Wear life Wear index 120 100 80 60 100 100 40 Ease of leaning Dry grip 20 Ease of steering 0 Significantly improved performance on wet surfaces in addition to upgraded straight-line stability and steering ease on dry surfaces Wear life is equal to the 's 13
PRODUCT LINEUP No. Size Front 1 120/70ZR17 M/C (58W) 2 180/55ZR17 M/C (73W) Rear 3 160/60ZR17 M/C (69W) From April 2015 14