The Race Face Aeffect crank is designed to handle aggressive trail riding at XC crank weight and an attractive pricepoint. Features the CINCH system with its interchangeable spider options and a 24mm EXI interface spindle. Crank arms forged from 6066 aluminum Compatible with all CINCH direct mount rings and spiders to easily convert between existing chainring standards including: direct mount, 1x, 2x with and without bash, and 3x configurations 24mm EXI spindle compatible with Race Face X-Type bottom brackets or Hollowtech II compatible bottom brackets CINCH removable spiders and direct mount rings utilize a 20-tooth ISIS cup BB tool for removal and installation Bottom bracket and chainring not included Direct mount chainline: 2X Cinch spider chainline: 48 ... More info