Ritchey WCS Logic 1-1/8" Threadless Headset: EC34/28.6 EC34/30 Black Model=Max SLR Gel Superflow Saddle When using the Pressure Over

When using the Pressure Over Drive as a regular pump air has to fill the chamber before it will start to fill an empty tire/tube

Semi-round shape Proxim W650 is more flexible allowing greater freedom of movement and facilitating each pedal stroke

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The FSA Orbit X threadless headset is constructed of aluminum and features sealed cartridge bearings

Ritchey WCS Logic 1-1/8" Threadless Headset: EC34/28.6 EC34/30 Black Model=Max SLR Gel Superflow Saddle When using the Pressure OverRitchey WCS Logic 1 1 8" Threadless Headset: EC34 28. 6 EC34 30 Black. The Ritchey Logic WCS threadless headset features angular contact cartridge bearings. Logic WCS uses angular contact cartridge bearings TECH SPECS Color Black Lower Stack Height 12. 9 Bearing Type Cartridge Crown Race 30 Weight 110 Defined Color Black Upper Stack Height 15. 4 S. H. I. S Upper EC34 S. H. I. S. Stem Clamp Diameter 28. 6 Threadless S. H. I. S Lower EC34