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sealed bearings
These are race-specific and feature a clean and slick look
MATERIAL: Aluminum
Features an alloy cap and sealed bearings
clearance for ever-growing tire sizes
Profile Spline-Drive Spider-4-Arm-22mm Color:Black sealed bearingsSPECS: MATERIAL: CNC machined in the U. S. A. from 6061 aluminum. USE: Works with most 3 pc chromoly cranks and 48 splined 22mm spindles (made with offset for outboard bottom bracket Profile). Allows you to use 4 Bolt chainrings. SIZE: 104mm bolt pattern for 4 bolt chainrings. NOTE: Spline Drive Spiders slide directly onto 48 splined 22mm spindles and do not require a gear bolt to attach to crank arm. Weight: 2. 55oz 74g