Topeak Rack Extra Long Mount Kit compatible with all Topeak racks
Topeak Fit Kit for Racks
RKTP31 - For BabySeat II Racks and MTX Tubular Racks (26.5 cm in length).
RKTP33 - For BabySeat II Racks and MTX Tubular Racks (34.5 cm in length for small bike frames).
NOTE : If you have a small frame bike and cannot install Topeak rack or BabySeat in recommended position (2 or 3Ëš from horizontal), please use the 34.5cm extra long mounting bracket arm for proper installation.