Because of risks, it's out of the safe-zone.
If your body can handle it, go for 8cm in femur and 6.5cm-7cm in tibia.
around 5cm tibia and 7-8cm on femur
Thank you for the answers. I just did a mock-up with 8 on femurs and 5 on tibias, what do you think of the proportions?https://ibb.co/Rbhd7jW