Size commonly used in various hub makes DT, Formula etc.
Mountain Bike Headset Bearing Set, 39/41.8 × 30 mm, Sealed Cartridge Bearing for Straight 1-1/8" Fork, Bearing Steel, Silver(41.8MM*30.15MM)
Bike Headset Bearing, Sealed Cartridge Bearing for Bicycle, Mountain Bike Headset Repair Parts, Steel Bowl Set, 41-52mm(6pcs)
Hosrivae ACB4052 MH-P16 Headset Bearing – 40x52x7mm Steel Sealed Cartridge Bearing with 45°/45° Angular for Road & Mountain For Bike Forks
Feeshoppher Bike Headset Bearing Set 41mm 41.8mm 47mm 49mm 51mm 52mm Sealed Cartridge Bearing Steel for Smooth Rotation Waterproof Dustproof Design for Hidden Semi-Hidden External He(6pcs)
15267 2rs 15x26x7mm HIGH PERFORMANCE SEALED CARTRIDGE BEARING CYCLE BIKE
COUNTAX WESTWOOD 10802200 FRONT WHEEL SEALED CARTRIDGE BEARING ALL MODELS -UK
