Tank II Headset Based on the ever popular Tank model within our AheadSet brand, the Tank II is a cost efficient entry of our new Tank family of headsets. The Tank II is built for durability and the demanding requirements of BMX and freestyle riders who expose the weaknesses of ordinary headsets. Construction: The Tank series uses specially designed hardened chromoly steel cups for supreme durability. The bottom cup utilizes oversized 1/4" ball bearings to handle the added stress to the lower assembly. size 1-1/8" materials hardened chromoly steel cups bearings 5/32� standard ball bearing retainer on top assembly, oversized 1/4� standard ball bearing retainer on bottom upper stack height 15.1mm lower stack height 13.5mm total stack height 28.6 mm weight* 234 g finish/color black ****RRP£25.00****