MCS Bicycles BMX Quick-Release Seat Post Clamp - 31.8mm - 1-1/4" - Black 5" This will fit newer models

This will fit newer models but only if you remove the front brakes from the bike

and 100mm hubs

OLD: 100mm

The added stiffness significantly improves bike handling while putting more upper body power into your pedal stroke

Posted Weight: 300g pair

MCS Bicycles BMX Quick-Release Seat Post Clamp - 31.8mm - 1-1/4" - Black 5" This will fit newer modelsThe newest MCS Bicycles Quick Release Seatpost Clamp allows you to lower your seat on race days and lift it up for those long rides during the week without having to bust out an Allen wrench! It is constructed of aluminum, with a posted weight of 42. 0 grams 1. 48 ounces. Size: 1 1 4 (31. 8mm) Color: Black