The Profile Spline Drive spider is designed to provide optimal chainline when using a Profile Euro Outboard bottom bracket. Places the single chainring over the external bearing cup. Machined from a billet aluminum plate with a supplied Crmo steel adapter already pressed in to work with 48 spline spindles. Three styles of single chainring spider available: -4 Bolt (104MM BCD) for 19mm splined axle -4 Bolt (104MM BCD) for 22mm splined axle -5 Bolt (110MM BCD) for 19mm splined axle Weight: 4-Bolt: 74g/2.6oz 5-Bolt: 83g/2.9oz
