Bicycle Kids Child Front Baby Seat bike Carrier USA Standard with Handrail USA Safety Standard Certificate All Accessories Included Easy to Remove without Tools Universal quick release bracket allows seat to mount/dismount from bike in seconds and is compatible with most bike frames (27.2-38mm diameter round frames, NOT for dual suspension bikes,NOT for beach cruisers,NOT for Front derailleur pull from the Top, May not for small size 29" bike fame, the rack possibly touch the tire) Designed and tested for children from 9 months to 3 years old, up to 33 lbs/15 kg