Andrews first gear set for 74" and 80" 2.44:1. Best choice for Super Glides, choppers and lighter bikes with stock or smaller motor or trans sprockets. This is a no-clunk, 48 mph 1st gear. Installation in 1980-1984 FX requires 21T (1.82 ratio) 2nd gear part #96-212 for this 1st gear. Sold as set.