Bicycle Pulley Bearings MR128ZZ
8
12
3.5
0.3
543
274
40000
48000
1.12
MR128ZZ is a Pulley Bearing used to support smooth rotation of the derailleur pulley, bearing the load of the derailleur and chain tension.
It features durability, low friction, and high load capacity.
Bore (d): 8 mm
Outer (D): 12 mm
Width (B): 3.5 mm
Chamfer (r): 0.3 mm
Dynamic Load: 543 kgf
Static Load: 274 kgf
Limiting Speed (Grease): 40,000 rpm
Limiting Speed (Oil): 48,000 rpm
Weight: 1.12 g
Some non-standard or currently out-of-stock bearings may not be immediately available. If you have specific requirements, feel free to contact us — we will do our best to confirm lead times and provide alternative solutions.
