The FSA Headset No.42 is a replacement headset ...
for certain Specialized mountain bikes and electric mountain bikes. Includes: top cover, washer, compression ring, upper bearing (1-1/8"), lower bearing (1.5"), and crown race.
gap between the 40 and 110-series headsets. This version of the Hellbender 70 Upper Headset features a super low, 4.6mm stack height that will allow for the handlebars to be positioned as ...