Im not aware .50 is still an option. Maybe there are optional gears I don’t know about but this made it sound like they got rid of .50 in 2017 and .80/.63 was the only options these daysVery cool. I went with the 2.97 1st and .50 6th. I have 3.89 gears. At 80 I will be at right around 2000 rpm.