Glad to hear that you are building an aircraft with retracts. There are a number of designs that have nose gears that don’t fully disappear into the wheel well. The main advantage of retracts is to reduce drag by getting the wheel and strut out of the airstream. I use 2 ¼” wheels on the main gear and 2” on the nose but I mostly fly off tarmac. There are a number of 2” wheels available some wider than others. The Sullivan Skylite works pretty well but as I recall I had to drill the hub for the 5/32” strut.