Scarpe da Corsa Sidi Genius X 2026 san marco comfort 7° 5 Wheelbase 970 mm 7° 5 Wheelbase 970 mm 982 mm 993 mm 1006 mm 1018 mm 6 Chainstay 405 mm 405 mm 405 mm 405 mm 405 mm 7 Head tube 110 mm 125 mm 140 mm 160 mm 180 mm 8 Bottom bracket drop 74 mm 72 mm 72 mm 72 mm 72 mm 9 Trail 83 mm 73 mm 68 mm 65 mm 62 mm 10 Fork offset 42 mm 42 mm 42 mm 42 mm 42 mm 11 Fork length 375 mm 375 mm 375 mm 375 mm 375 mm 12 Reach 369 mm 383 mm 396 mm 406 mm 418 mm 13 Stack 518 mm 533 mm 550 mm 570 mm 590 mm Cassette NOT included The double NUUN dials and high density arch provide precise adjustment – Fit system: External heel and reinforced structure – maintains hold even under strain