Thule Yepp Maxi 2 Child Bike Seat - Rack Mount Midnight BlackThule Yepp Maxi 2 Child Bike Seat Rack Mount Midnight Black. The Thule Maxxi 2 Rack mount child seat rack features a new rack mount design incorporates universal clamp system removing the need for separate adapter. Perfect for ebikes long tail cargo bikes. Light outer shell with water repellent padding keeps your child safe and comfortable. Lightweight yet sturdy seat combining a hard outer shell with soft padding for premium child comfort Adjustable