Technical Descripiton(S.H.I.S): EC34/30
Bottom head tube inside diameter: 34mm
Crown race seat diameter: 30mm
Cartridge Bearing Size O30.15xO39x6.5×45˚x45˚
Black, Red, Blue, Gold
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Use: Quick release Road or MTB seat post clamp
Clamp material: CNC machined 7075 T6 heat treated Aluminium,Clamp band,and end nut.
Lever: CNC machined 7075 T6
Bolt: TiAL6V4 Titanium.
Sizes: 31.8mm & 34.9mm &40mm
Weight: 22.5grams/31.8mm & 23.8grams/34.9mm & 25.6grams/40mm