Any RX deck, you have to pull the transport to get the idler tire out. And to properly do it, the transport needs to be dis assembled. Except the RX 202.
Heres a quick and dirty.
Pop the hood. Clip all zip ties for transport and power switch wire.
Next remove front facia i think 5 screws.
Next, remove top bracket, 2 screws on top and 1 screw on left and right button control panels. , and transport bracket 4 screws.
Next, remove screws for both front control panels. Pull each panel straight forward to access the 4 big phillips transport screws. Remove the 4 screws and transport will come out.