{"kind":"shaft","data":{"name":"ヤマハ Air Speeder for Yamaha M421u","url":"https://golfscale.jp/shaft/yamaha/air-speeder-for-yamaha-m421u","slug":"SSYM010","brand":"ヤマハ","series":"Air Speeder for Yamaha M421u","shaft_type":"純正シャフト","material":"カーボン","model_count":1,"models":[{"shaft_id":"SJYM2020004","name":"Air Speeder for Yamaha M421u","release_year":"2020-10-16","specs":[{"flex":"R","weight_g":46.0,"torque":5.2,"kick_point":"中","length_inch":[40.5,40.0,39.5]},{"flex":"SR","weight_g":51.0,"torque":4.8,"kick_point":"中","length_inch":[40.5,40.0,39.5]},{"flex":"S","weight_g":56.0,"torque":4.2,"kick_point":"中","length_inch":[40.5,40.0,39.5]}]}],"sources":[{"url":"https://golf.yamaha.com/products/inpres_ud2_ut.html","checked_on":"2026-05-11"}]},"_meta":{"site":"ゴルフスケール","generated_at":"2026-11-01T08:16:56+00:00","license":{"text":"事実（数値・名称・住所など）は出典 URL つきで引用自由。記事本文・画像は要連絡。","url":"https://golfscale.jp/legal/credits"},"attribution":"出典: ゴルフスケール（golfscale.jp）","source_url":"https://golfscale.jp/shaft/yamaha/air-speeder-for-yamaha-m421u"}}