Cane Creek Seatpost Adapter Fill The Gap The Cane Creek Seatpost Adapters quite literally fill the gap, with over 25 sizes available; the combinations are endless. These Seatpost Adapters are compatible with static, suspension, and dropper Seatposts, as well as all frame materials. Features Available in over 25 sizes so you can find the exact combination you need Compatible with static, suspension, and dropper posts Works with all frame materials | Cane Creek | Seat Post Adapter 30. 9 To 34. 9