Foldable bicycle tire positioning bracket with 16-29 "red wheels Attention: This product page only sells red. If you need other sizes/colors, please refer to the Q&A. Description: It is used for bicycle wheels ranging from 16 to 29 inches and is also suitable for 700 wheels. Sturdy structure, high-quality aluminum alloy, very stable, sturdy and durable. Foldable design, not taking up too much space, rotating and fixing the seat, and replaceable front and rear wheels. Suitable for various types of bicycles, such as folding bicycles, road bicycles, BMX bicycles, children's bicycles, etc. Bicycle wheel alignment brackets are a great choice for both front and rear wheels. Specifications: Material: Aluminum alloy. Size: 21x30x26.5cm This package includes: One piece bicycle wheel alignment bracket Q: Regarding availability? A: The products we are showcasing are usable.