RockShox Damper Shaft for DLX/SDLX Coil B1 37.5-45mm 11.4118.109.450 Model=HRM-Fit Heart Rate Monitor Same features as the 40-Series

Same features as the 40-Series headsets with simpler machining and more economical materials

Improved grip in wet conditions

4" Casing Nylon TPI 60 Compound Race Formulation Graphene + Silica Bead Folding Type Tubeless Color Black Weight -

ring type single (anti-chain drop) mount 4x104mm teeth 32t oval/round round color black

8 Color Matte Black Weight 165 Material Carbon Defined Color Black Stack Height 41 S

RockShox Damper Shaft for DLX/SDLX Coil B1 37.5-45mm 11.4118.109.450 Model=HRM-Fit Heart Rate Monitor Same features as the 40-SeriesRockShox Damper Shaft Assembly Deluxe Super Deluxe Coil 37. 5 45mm B1+. RockShox Super Deluxe Coil Damper Shafts for service and repair.