SRAM DUB English Bottom Bracket - English/BSA 73mm E-Type SuperBoost + Black CheckoutSpec= CrMo Rails - Purple They are designed to have

They are designed to have an ultra-low stack height

welded aluminum clincher rim

8 Series Disc Brake PadsDisconnected two piece back plate

Measure the child's height in cm - that is how these are sized

so the top of the shaft is lower

SRAM DUB English Bottom Bracket - English/BSA 73mm E-Type SuperBoost + Black CheckoutSpec= CrMo Rails - Purple They are designed to haveSRAM DUB English Bottom Bracket English BSA 73mm E Type SuperBoost + Black. The SRAM DUB bottom bracket series has a simple job to connect crankarms and protect the smooth long lasting application of power to the drivetrain. SRAM engineered the oversized DUB spindle to work across every bottom bracket standard simplifying crankarm compatibility. Designed for use with SRAM SuperBoost+ Cranksets Gutter Seal Technology drastically improves sealing