I don't know what the stock Hankooks are for the JSW but the Hankook Optimo H727 is the top rated tire in the lower "Standard Touring All-Season" category (via the survey at Tire Rack). This is the same category that the stock Bridgestone Turanza 400s are found in, except instead of being on the top of the survey with the Hankooks, the Turanza 400s are found waaaay down at the bottom. As in Run Away! Run Away! In any case, I wouldn't buy tires from that category because nothing in it is rated at the top of the tire heap.
The following are the rock stars of the summer tire world according to the extensive user reviews found at the tire rack. Only tires with 8.5 or better (out of 10) in nearly every summer performance category are listed here. Note that some lean toward high performance and others lean toward long wear. Weights listed are for 205/55 16s.
Continental ExtremeContact DW (Max Performance Summer)
205/55ZR16 Speed Rating “W” = 168mph Treadwear: 340
Traction: AA Temperature: A340 AA A Max 51 psi Tread Depth: 10/32" Wt: 19lbs.
Country of Origin "BR" = BRAZIL
HPR:9.1 WT:9.2 CS:8.9 DT:9.3 SR:8.6 RC:9.3 NC:9.2 TW:8.7
Bridgestone Potenza RE960AS Pole Position (Ultra High Performance All-Season)
205/55R16 Speed Rating “W” = 168mph Treadwear: 400
Traction: AA Temperature: A400 AA A Max 51 psi Tread width: 11/32" Wt: 24lbs.
Country of Origin "MX" = MEXICO and "JP" = JAPAN
HPR:8.7 WT:8.9 CS:8.8 DT:9.1 SR:8.7 RC:8.8 NC:8.6 TW:8.6
Yokohama AVID ENVigor (H&V) (High Performance All-Season)
205/55R16 Speed Rating “V” = 149mph Treadwear: 560
Traction: A Temperature: A560 A A Max 51 psi Tread Depth: 10/32" Wt: 22lbs.
Country of Origin "US" = UNITED STATES OF AMERICA
HPR:8.9 WT:9.1 CS:8.9 DT:9.3 SR:9.0 RC:8.8 NC:8.7 TW:9.1
Michelin Pilot Exalto A/S (High Performance All-Season)
205/55R16 Speed Rating “H” = 130mph Treadwear: 400
Traction: A Temperature: A400 A A Max 44 psi Tread Depth: 10/32" Wt: 23lbs.
Country of Origin "US" = UNITED STATES OF AMERICA
HPR:8.7 WT:8.8 CS:8.8 DT:9.1 SR:8.8 RC:8.8 NC:8.4 TW:8.7
Michelin Primacy MXV4 (Grand Touring All-Season)
205/55R16 Speed Rating “H” = 130mph LRR: Low Rolling Resistance Treadwear: 620
Traction: A Temperature: A620 A A Max 44 psi Tread Depth: 11/32" Wt: 23lbs.
Country of Origin "US" = UNITED STATES OF AMERICA and "CA" = CANADA
HPR:8.6 WT:8.6 CS:8.7 DT:9.1 SR:8.7 RC:9.0 NC:8.8 TW:9.1
Bridgestone Turanza Serenity (Grand Touring All-Season)
205/55R16 Speed Rating “H” = 130mph Treadwear: 740
Traction: A Temperature: A740 A A Max 44 psi Tread Depth: 12/32" Wt. 25lbs.
Country of Origin "ID" = INDONESIA and "JP" = JAPAN
HPR:8.7 WT:8.8 CS:8.7 DT:9.1 SR:8.6 RC:9.1 NC:8.8 TW:8.8
HPR = Hydroplaning Resistance
WT = Wet Traction
CS = Cornering Stability
DT = Dry Traction
SR = Steering Response
RC = Ride Comfort
TW = Treadwear
http://www.tirerack.com/tires/surveyresults/index.jsp
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