4252ST Bicycle Headset: "42" for OD ø42,"52" for OD ø52,"S"for Straight Tube "T" for Tapered Tube Fork. Sealed Bearing. Integrated System (IS).
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Drop-In ACB Bearings/ Integrated / IS Type Headset. ACB Bearings. FSA Headset. For 1-1/8" - 1.5" Tapered Steerer / Headtube. Upper Fit: IS42/28.6. Upper Headtube ID: 42mm.
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Neco Headset. For Tapered Steerer / Headtube. Drop-In Bearing / Integrated / Internal Type Headset. Includes: Compression Fitting Top Cap, Micro Adjust Shims & Crown Race. Upper Fit: IS42/28.6. Upper Headtube ID: 42mm.
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IS52 1.5” BOTTOM HEADSET BEARING. IS42 1 1/8” TOP HEADSET BEARING. Take the new bearings, apply a little gease and place on the crown race of the fork. Take the bike out of the stand and give it a bounce on the ground to ensure everything is seated into place.
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4252ST Bicycle Headset: "42" for OD ø42,"52" for OD ø52,"S"for Straight Tube "T" for Tapered Tube Fork. Material: CNC Aluminum Alloy. IS52/40 (30). Weight: About 91g.
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Steerer Tube OD: 1.1/8" to 1.5" tapered. Stack height: 8.9mm. Fork crown seat OD: 39.8mm.
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IS52 1.5” BOTTOM HEADSET BEARING. IS42 1 1/8” TOP HEADSET BEARING. Take the new bearings, apply a little gease and place on the crown race of the fork. Take the bike out of the stand and give it a bounce on the ground to ensure everything is seated into place.
eBay
Drop-In ACB Bearings/ Integrated / IS Type Headset. FSA Headset. For 1-1/8" - 1.5" Tapered Steerer. Upper Fit: IS42/28.6. Upper Headtube ID: 42mm.
eBay