SHIMANO euro JIS square taper Bottom bracket

Designed for young riders, the SHIMANO BB-UN300 Euro cartridge bottom bracket has a steel axle with a JIS standard square drive which is suitable for cranks of the same standard. It features sealed bearings for tight, frictionless pedaling. It only fits internally threaded bottom bracket frames designed to accommodate Euro BSA / BSC type housings.

FEATURES :
• Type: Euro cartridge
• Housing diameter: 34.5mm
• Axle: JIS square 
• Axle length: 113/118mm
• Thread: BSA / BSC
• Width: 68mm
• Sealed bearings
• Weight: 290g
• Sold without axle screws