Box components Box Two Center Clamp Stem BMX Headset MFPN=1569010 Gender/Age Adult Rotational Protection Yes

Gender/Age Adult Rotational Protection Yes Minimum Head Circumference 54 Color Velvet Black Size Medium Visor Included Yes Multi Impact No Weight 410 Helmet Certifications Complies with the U

Separate Wheel Compartments

Unique flange design reduces dish requirement and minimizes tension range between drive side and non-drive side spokes

The e*thirteen Helix Race 12-speed 13-52t cassette features close ratio gearing specifically engineered for steep terrain where climbing time and shift frequency is high and descents are gravity driven

Box components Box Two Center Clamp Stem BMX Headset MFPN=1569010 Gender/Age Adult Rotational Protection YesBox Two Center Clamp stems are cold forged from the highest quality 6061 T6 aluminum available. Featuring an open skeletal design and a dual mid bolt wedge mounting system they are lightweight yet maintain a very high level of strength. By removing the rear pinch bolts and moving the mounting bolts to the middle of the stem Box reduced the weight and size and eliminated a serious hazard to the rider`s knees TECH SPECS Type BMX Headtube Quill Diameter