GT Siren 12" Kid's Bike w/ Training Wheels - Purple *IN STORE PICK-UP ONLY* XXXXL It is an adjustable bottom

It is an adjustable bottom bracket that allows you to adjust the spindle from side to side before locking into place to attain a more perfect chain line

The 16" Weinmann 519 rim is a silver anodized aluminum single wall that has 36 holes

The KMC 415H chain is 1/2" x 3/16" x 98L

Brake Levers: Shimano EF41 with 2-finger Reach Adjustable lever

GT Siren 12" Kid's Bike w/ Training Wheels - Purple *IN STORE PICK-UP ONLY* XXXXL It is an adjustable bottomThis item is only available for IN STORE PICK UP. It will not be shipped; it is only only able to be picked up at our store C&W CYCLE in Morenci, MI. With 12 wheels, a lightweight alloy design, on a low slung frame, this GT is ready for pedal power. Its super easy to ride with relaxed gearing, and the training wheels are removable for when your young ripper is ready for the big day. Color: Purple Specifications Frame: 12" GT LegitFit Design, Alloy