... 4130cromoly 4130 T/T 28.60mm, D/T 28.60mm, seat tube: 29.1*520MM,forkcromoly 4130cromoly, threadless steer tube, 28 ... bolts on the topseat post alloy, 25.40*300mm, with a-headseat pin alloy, ID: 29.0, one boltPedal alloy, pedal ... this bicycle in accordance with the user manual, we offer a limited warranty of the following items:1. The main frame ...