Do you know Yonex history the oldest string until the newest? I only know from last year Exbolt 63 and this year Exbolt 65
Probably BG65 is the oldest string. It came out in the 1980’s. Other ‘old’ strings are BG80 and BG66 but not as old as BG65.
I can't find definitive release dates for the strings on wikipedia or anything, but they do tend to do slight revisions BG 80 power, BG 80 Sharp instead of BG80. So those ones come out after the first. https://www.yonex.com/badminton/strings?p=2 As Cheung said, BG65 is the oldest. They also have BG66 BG80 Nanogy98 Aerosonic Skyarc (never heard of) Nanogy 99 Aerobite (some aerosonic and another string iirc) And then the two exbolts you described.
