I have Trek Emonda SL5 Disk 2022 which comes with Shimano 105 groupset and Shimano RT70 centerlock 160mm break rotors. It uses Shimano 105 R7020, 11 speed shifters.

I need to change the rear break pads as they weared out. The old ones are listed as Shimano L03A but I cannot find those anywhere. What break pads can I use as replacement?

Also old break pads have different numbers listed below the L03A model (like SSH22 for Right side rear one and SS101 for Left side rear one). Those numbers are different on front and back pads.

Do I need to consider those numbers when buying replacement break pads or just using the same model will suffice?

I have Trek Emonda SL5 Disk 2022 which comes with Shimano 105 groupset and Shimano RT70 centerlock 160mm brake rotors. It uses Shimano 105 R7020, 11 speed shifters.

I need to change the rear brake pads as they are worn out. The old ones are listed as Shimano L03A but I cannot find those anywhere. What brake pads can I use as replacement?

Also old brake pads have different numbers listed below the L03A model (like SSH22 for Right side rear one and SS101 for Left side rear one). Those numbers are different on front and back pads.

Do I need to consider those numbers when buying replacement brake pads or just using the same model will suffice?