The BB-4000 spins on oversize cartridge bearings with a die-casted alloy and CNC machined external cups.

DESCRIPTION & MATERIALS
• Oversize Cartridge Bearings
• Die cast alloy and CNC machined external cups
• Reinforced Polymer center sleeve w/ double o-ring seals SIZES
• Available in 68mm (BSA) and 70mm (ITA) size
FINISH
• BED cups
WEIGHT
• 97 g