Chris King Seatpost Collar Add Some Style To Your Ride The seatpost collar is what holds your seatpost in place while you ride. Not only does it play an important part, but it can also add a touch of style to your ride. The Chris King Seatpost Collar is an aluminum collar with a stainless steel bolt, washer, and barrel nut. It is available in 10 colors to match other Chris King components and is available in 30. 0, 31. 8, 34. 9, and 36. 4mm. Features Available in 10 colors to match other Chris King components Four sizes including 30. 0, 31. 8, 34. 9, and 36. 4mm Made from lightweight and durable aluminum with stainless steel parts | Chris King | Seatpost Collar | Black | 30Mm