Wolf Tooth Components Upper Headset IS42 Specialized IS (3mm Stack) Black MFPN=26-KNL-BL Zero stack cups press into

Zero stack cups press into the head tube with very little stack height

Reduced friction internal sealing

Short and wide rib design for added comfort with no side to side play

BOOST F15/20

8 Tubeless Folding Black Dual EXO

Wolf Tooth Components Upper Headset IS42 Specialized IS (3mm Stack) Black MFPN=26-KNL-BL Zero stack cups press intoThese IS headsets are made exclusively for Specialized frames with molded in internal bearing cups Custom in house designed seals Enduro stainless bearings Uppers include a 5mm integrated spacer stem cap with an alloy bolt Made in MN, USA TECH SPECS model Premium Specialized IS S. H. I. S. IS42 28. 6 upper lower upper stack 3mm color black