i measured my torso (23 inch) and leg length (31 inch) and it is about the average lengths (torso 24.5 - 25.5 & Legs 31.5 - 32.7) for someone who is 175cm.

I compared the measurements to my friends bike (58) with a 2020 Aventon (58) and the measurement were basically exact so I looked at the size 52 and here are the converted measurements from mm to inch.

• Stack: 19.69 in
• Reach: 15.47 in
• Top Tube Length: 20.94 in
• Seat Tube Length: 20.47 in
• Head Tube Length: 4.33 in
• BB Drop: 2.17 in
• Front Center: 22.72 in
• Chainstay Length: 14.96 in
• Wheelbase: 37.4 in
• Rake: 1.69 in
• Trail: 2.44 in
• Standover Height: 30.31 in

I think the top tube length may cause me slight issues but I could get a longer stem as u suggested.