23 inch

21 Inch Bike Frame For What Height? Rider Height Suggested Mountain Frame Size Feet & Inches Centimetres Frame Size (inches) 5’6′′ – 5′ 10′′ 168cm – 178cm 17′′ – 18′′ 5’10” – 6’1′′ 178cm – 185cm 19′′ – 20′′ 6’1′′ – 6’4′′185cm – 193cm 21′′ – 22′′ What age is a 21 inch bike for?