Kids Ride Shotgun Pro EVO 2-in-1 Child Seat One Seat. Nine Months to Five Years. Most child seats make you choose, buy for the infant stage or skip ahead to the toddler years. The Pro EVO solves that with a convertible design that starts in a harnessed configuration for babies as young as nine months and converts to the full Pro seat for kids up to age five. No second seat to buy, no awkward transition. The zero-contact mounting system attaches to the headset spacers and seatpost so there is nothing clamping your frame, which means it works with modern full-suspension bikes and e-bikes with wide down tubes where a traditional frame-mount seat won't fit. Two included headset spacers let you set it up on two different bikes, and the quick-release system gets the seat on or off in about 15 seconds once the initial install is done. Features 2-in-1 convertible design harnessed setup for children 9-24 months (9-15kg), converts to Pro seat for children 2-5 years (12-27kg) Zero-contact headset and seatpost mount no frame contact, no scratches, compatible with regular MTBs and e-bikes with wide down tubes Fidlock(R) childproof buckle with 5-point harness and sternum strap secure harnessed setup for younger riders who aren't ready to ride unrestrained 15-second quick-release system fast on and off after initial installation, no tools required Two headset spacers included lets you set up the seat on two separate bikes out of the box Fully adjustable legs, saddle position, and harnessed seat tune the cockpit fit and grow the seat with your child across four-plus years of riding Standard 1-1/8" steerer compatibility fits almost all modern MTBs with 10mm of headset clearance under stem; adapters available separately for ICR routing, Trek Knock Block, and Scott Syncros headsets Certified to EN 14344 and ASTM F3641 independently tested front-mounted child bike seat safety standards | Kids Ride Shotgun | Pro Evo 2-In-1 Child Seat Seat & Bar Combo