Join Date: Apr 2002
Location: Montréal (Québec)
You would indeed neet to raise the attachment to a higher point on the seatpost. However, there are two problems with that:
1. The Trail-a-bike attachment will slide down fairly quickly, unless you put a couple of tight pipe collars or a metal sleeve to prevent the attachment from sliding down.
2. Even if you solve the first problem, there is a question of leverage. Because the child may be leaning on one side or the other, the Trail-a-bike imposes a fairly high bending moment on the seatpost. If the Trail-a-bike is attached 15-20 cm above the seatpost clamp, the bending moment will induce fairly serious stress constraints in the seatpost and it will snap.