Thomson X4 Stem MTB Headset MFPN=20018 1/4" drive suitable for power

1/4" drive suitable for power screwdrivers

Higher load bearings protected by replaceable full-contact radial lip seals

30mm installed diameter creates a low profile for more sensitive bike handling

Integrated bike lock

6' Length 140Cm (4

Thomson X4 Stem MTB Headset MFPN=20018 1/4" drive suitable for powerOne piece of solid 7000 series aluminum extruded billet precision machined by Thomson in Macon Georgia. Features a traditional steerer clamp that is shaped to save weight and to be knee friendly. Thomson stems are the strongest in the industry meaning enduro and downhill riders can run them confidently. Superior balance and combination of strength stiffness and weight TECH SPECS Type MTB Headtube Quill Diameter 1 1 8` Length 120 Bar Clamp Diameter 31.