Inspect the bike - in my case the mounting holes on the seat stays were missing, but the mounting hole near the hub was present.

To fix the problem I relied on the hole on the seat stays bridge and a couple of L-brackets.

Go to the hardware store. For this project the following supplies were needed:

• 2 x 50mm L-shaped mounting brackets
• 1 x M6 screw, 40mm long
• 1 x M6 washer
• 1 x M6 locknut (it resists better to the vibrations than regular threaded nuts)
• 2 x M5 locknuts (the rear rack mounting kit did not include those, not pictured)

Graph paper not needed, but makes everything look more scientific!

Put everything in place. Tighten the screw.

Done, you can now use the holes from the bracket to add the rear rack.