2x Bike ball bearings :
Description :
Sold by pair.
Enable to replace original parts (crankshaft bearing, headsets, hubs).
The diameter are measured inside and outside (it's an approximate value in mm).
Details :
------- WHEEL HUB (front, rear) -------
- Diameter 13/20 mm, 7 balls (front hub) :
Outside diameter : 20 mm ;
Inside diameter : 13 mm ;
Number of balls : 7 ;
Balls diameter : 3/16" (4.763 mm) ;
- Diameter 15/25 mm, 7 balls (rear hub) :
Outside diameter : 25 mm ;
Inside diameter : 15 mm ;
Number of balls : 7 ;
Balls diameter : 1/4" (6.35 mm) ;
------- CRANKSHAFT (traditional, BMX) -------
- Diameter 20/30 mm, 7 balls (traditional crankshaft) :
Outside diameter : 30 mm ;
Inside diameter : 20 mm ;
Number of balls : 7 ;
Balls diameter : 1/4" (6.35 mm) ;
- Diameter 20/30 mm, 9 balls (traditional crankshaft) :
Outside diameter : 30 mm ;
Inside diameter : 20 mm ;
Number of balls : 9 ;
Balls diameter : 1/4" (6.35 mm) ;
- Diameter 25/34 mm, 9 balls (traditional crankshaft) :
Outside diameter : 34 mm ;
Inside diameter : 25 mm ;
Number of balls : 9 ;
Balls diameter : 1/4" (6.35 mm) ;
- Diameter 31/40 mm, 11 balls (traditional crankshaft) :
Outside diameter : 40 mm ;
Inside diameter : 31 mm ;
Number of balls : 11 ;
Balls diameter : 1/4" (6.35 mm) ;
- Diameter 32/45 mm, 9 balls (BMX crankshaft) :
Outside diameter : 45 mm ;
Inside diameter : 32 mm ;
Number of balls : 9 ;
Balls diameter : 5/16" (7.94 mm) ;
------- HEADSET (standard 1", oversize 1 1/8", bmx) -------
- Diameter 27/37 mm, 14 balls (bike and moped headset) :
Outside diameter : 37 mm ;
Inside diameter : 27 mm ;
Number of balls : 14 ;
Balls diameter : 5/32" (3.97 mm) ;
- Diameter 31/38 mm, 16 balls (standard headset 1") :
Outside diameter : 38 mm ;
Inside diameter : 31 mm ;
Number of balls : 20 ;
Balls diameter : 5/32" (3.97 mm) ;
- Diameter 28/39 mm, 15 balls (BMX headset) :
Outside diameter : 39 mm ;
Inside diameter : 28 mm ;
Number of balls : 15 ;
Balls diameter : 3/16" (4.763 mm) ;
- Diameter 31/40 mm, 22 balls (oversize headset 1 1/8") :
Outside diameter : 40 mm ;
Inside diameter : 31 mm ;
Number of balls : 22 ;
Balls diameter : 5/32" (3.97 mm) ;
Material :
Steel.
