What is the shift pattern for a 13 speed?

Range Lo Selector back

Low: 1, 1: 2, 2: 3, 3: 4, 4: 5 Range High

1: 6 select up 7, select down shift 2: 8 select up 9 select down shift 3:

10 select up 11, select down sift 4: 12 select up 13.

Very Easy If you want Ill tell you 18 and 20 twin shift.