The new DK Sprinter Series bikes are designed for serious BMX racing at prices that will keep your budget on track. In terms of performance, quality, and value, you'll be hard pressed to find better race bikes for the buck than the DK Sprinter series. - Sizing: 3'6" - 4'2" - Ages: 4 - 5 Specs: - Top Tube: 16.25" - Chain Stay: 11.4" - Head Tube: 72º - Seat Tube: 70º