Looks like JIS for big Chinese stores. On my calipers, the outer diameter of the cup insert was 30.08mm. It comes with a star nut. On a 2002 LeMond steel frame (Reynolds 853) I had to slightly gouge the inside of the head tube to ensure the use of a pressing tool. because it could be pulled out by hand without gouging. It worked for me, but I would prefer common standards to avoid surprises.
Continental ContiSportContact 5 215/50 R17 95W summer
60 Review
9/16" 3 Bearing FOOKER MTB Bike Pedals Non-Slip Platform Bicycle Flat Alloy For Road BMX MTB Fixie Bikes
58 Review
MICHELIN Pilot Sport 3 275/40 R20 106 year old
56 Review
Smartphone TECNO Pova 3 6/128 GB, Dual nano SIM, silver
64 Review
Stay Comfortably Protected with QueensFace Mesh Dot Breathable Outdoor Riding Running Face Mask
8 Review
π― Gogogo Clear View 6X Magnification Laser Rangefinder for Golf/Hunting, 650/900 Yards Range, Accurate Measurement, Slope Function, Pin-Seeker, Flag-Lock & Vibration Technology
6 Review
Woplagyreat Washable Camouflage Breathable Adjustable
6 Review
Top-rated Kids Face Masks: Breathable, Reusable, and Adjustable Ear Loops with Cute Prints - Ideal for Outdoor Activities
8 Review