Long recognized as the world's lightest headset the new AER now offers a hybrid steel and aluminum bearing that provides even greater durability and a 40% weight savings over comparable models. Strategic machining and precision contours provide an optimal balance between weight savings and strength. The new AER headset is now an ideal headset choice for road and mountain bike applications- a high quality durable headset with durability and lightweight performance in mind* We're Australia's #1 retailer of MTB parts, clothing and accessories! Orders ship next business day. Note orders may incur NZ customs duty or tax - see whatsmyduty.org.nz.