Hi Marco,
Seems the majority of the Gee Bee ARF's have an engineering breakdown at the landing gear. They use a small Pattern ship style gear block with music wire for a strut and then install a 1 foot long wire with a 4 inch wheel on the end and expect it to somehow resist all of the forces of that long moment arm and large wheel. It will not.

As the above poster states, the wheel will touch the pants, like putting on brakes, and the model will nose over.
The gear needs to resist side loads and fore and aft loads. The strut needs a link soldered to the main strut and triangulating back to a hard point mounting it to the wing directly behind the main mounting several inches. Follow the angle on the wheel pant/strut covers, and construct so as to retain them internally within the wheel pant/strut covers when installed.

Then it needs a side load resisting scheme which on the larger models is often done with structural flying wires from mid span of wing to the lower end of the gear strut and to the wing/fuselage center, as the real airplane was done. The wider the bracing better.

In the case of the lighter Great Planes and some Chinese ARF's of similar size, there could be a triangulation of the load's forces done on the main and trailing strut by soldering a span wise plate onto landing gear strut wires in the wing mounting area part of the wire, and then a gussett either side of the gear wires down from the span wise plate, attaching to the strut all the way down to certain distance down the strut wires. The longer the better.

These schemes may overload the wood mounting structure in the wing, it may be advisable to increase the lumber in the landing gear mounting area by removing the wing covering and beefing up internally.

Some companies sell scale Gee Bee gear, but they are complex and very expensive. They may well be of larger scale than the Great Planes model. The way the landing gear is mounted and what the landing gear material is made from is the big problem with Gee Bee ARF landing gear. Their ground handling problems stem from this, the better the gear, the better the handling.

Chris...