Crupi sprockets are not just another CNC machined sprocket, they are precise, strong and great looking.  What makes ours better than all the others is we make them fit certain crank spindles instead of trying to fit them all.  We eliminate the center spacer making a better fit which allows better chain alignment by practically eliminating all side to side wobbling.  Made to fit Profile, Redline and any crank with a 3/4" spindle.  38t through 47t available in polished or black.

With the many gear sizes Crupi offers, we thought it would be good to offer you the most complete gear ratio charts available!

You can download and print any of these charts in a PDF format.

20 x 1-1/8 with 20 x 1" Tires              20 x 1.75 with 20 x 1.75 Tires

20 x 1-1/8 with 20 x 1-1/8" Tires             24 x 1-1/8 with 24 x 1-1/8" Tires

20 x 1-1/8 with 20 x 1-3/8" Tires            24 x 1.50 with 24 x 1.50 Tires       

20 x 1-3/8 with 20 x 1-3/8" Tires           24 x 1.50 with 24 x 1.75 Tires

20 x 1.50 with 20 x 1.50 Tires                  24 x 1.75 with 24 x 1.75 Tires