INDEXING BIKE GEARS NO FURTHER A MYSTERY

Shimano 12 speed: When organising 12 speed Shimano drivetrains there is a line within the back in the derailleur as demonstrated in the first graphic. Shift into the second to biggest gear, line up the edge of the biggest gear with the line over the derailleur to have the perfect B-stress.Whilst, should you’re owning problems shifting to the lowe