I have a 21” front rim with a hub that has a max inner diameter of 120.75 mm. I do not know the make or model. The drum brake is from the stock ct1b and the pads do not engage with the sidewall because the expanded diameter is 113 mm and there is no gear for the speedometer to work. What is your opinion on this? How could I make it work or should I get a new rim/hub assembly to fit the brake?

The front fork width is 118 mm and the hub from side to side is 129.25 mm. It was previously put together but it is not the correct way because it may bend the fork stanchions. Would changing out to the stock huh and rim fit this gap?

Thanks