FSA NO.54 Integrated Headset H2291 8.15mm Upper / 9.4mm Lower Stack Height MFPN=802024904 which measures your climbing performance

which measures your climbing performance over time

9 Primary Color Grey Volume Range 11-15L Volume 12L Bag Dimensions in cm 47x24x10 Max Bladder Volume 2L Waterproof Water-resistant Bladder included Included (2L) Color Stone

Designed for use with Promax HF-3 and CK-1 cranksets but will also fit other cranks that utilize SRAM 3-Bolt mount chainrings

And Bumpers) 27/29 (Buttercup And Non-Buttercup Compatible) - Zeb A1+

FSA NO.54 Integrated Headset H2291 8.15mm Upper / 9.4mm Lower Stack Height MFPN=802024904 which measures your climbing performanceFSA NO. 54 Integrated Headset H2291 8. 15mm Upper 9. 4mm Lower Stack Height. This FSA integrated headset combines lightweight construction with smooth bearing operation ensuring consistent performance and clean aesthetics.