The topeak babysitter ll rack uses an innovative design for an easy to secure rack which offers compatibility with all topeak mtx trunkbags and mtx rear baskets thanks to the quicktracktrade system the topeak babysitter ll rack has a super sturdy build design thanks to its strong tubular aluminium material when combined with the secure locking system you can be sure that your child or bags will be held securely on all surfaces with this bike rack topeak babysitter ll rack features