Profile "GEN 1" Pro XL Top Load BMX Stem - 51mm - Silver - USA Made 20t They have 150 engagement points

They have 150 engagement points and will work with Shimano type cogs

The Tioga Power Block tire is a BMX tire with low rolling resistance and durable long lasting compound that efficiently transfers pedal power and other rider inputs into lateral motion

The Speedster's tread is designed for the highest speeds with minimal drag on hard pack or paved tracks with a honeycomb center to provide excellent traction in every condition and surface and large diamond shaped side knobs delivering the grip you need in corners and large bowl turns

It works with 16t and larger ACS Paws

Forged aluminum design with a hinged clamp

Profile "GEN 1" Pro XL Top Load BMX Stem - 51mm - Silver - USA Made 20t They have 150 engagement pointsThe Profile GEN 1 Stem is a 20th anniversary re pop of Profiles original threadless, clamp on stem circa 1995 1996. It is made from 6061 aluminum. Size: PRO XL (51mm reach) Posted Weight: 429g 15. 01 oz Color: Silver Anodized