what would be a good string to replace a zymax 65?? recently I can't find any zymax 65 anymore.. and my string is close to breaking, I need to find a string to replace zymax 65
You can try Toalson Biologic BL6500 which is 0.65mm. Cheaper than BG66UM but i rate it lower in performance.
I suspect AP 62 Plus is just rebadged ZM62 (2nd Gen), though this has never been confirmed officially. Also AP62+ is 0.62mm, not quite the 0.65 or 0.67mm OP is asking for.
As Exert and Shinichi mentioned, you can order ZM65 from mybadmintonstore or RKEP. You can also order ZM65 easily from stringersworld. If you want to try other strings in the 0.65 - 0.67mm range, there are quite a few: Yonex: BG66 - 0.66mm BG66 Ultimax - 0.65mm BG66 Maxima - 0.65mm BG85 - 0.67mm NBG98 - 0.66mm Gosen: R4x Momone: 0.66mm Pro 66: 0.66mm Nanomicro: 0.66mm Victor: NS-660 Ti: 0.66mm VS-650: 0.66mm Polyfibre: B6 explosion: 0.66mm M5 Sensicore: 0.65mm Hope that helped