Associated 21033 SPUR GR/DR Cup, 55T/RC18T 55t spur gear Composite nylon construction Molded in drive cup FEATURES: Composite nylon construction Molded in drive cup INCLUDES: One 48 pitch, 55 tooth spur gear REQUIRES: Installation following kit manual COMMENTS: A 60 tooth gear is also available (ASCC0035) kpm12/07/2004 ir/jxs