I believe there is a front hitch receiver available. Check with E-Trailer and Roadmaster, making sure to input the proper model year of your chassis.
I feel that it makes sense to mount the spare tire up front, especially with consideration that you have bicycles in back. The spare tire up front makes a good counter-balance, much better there than hanging off the rear hitch. The spare tire with wheel weighs over 80 pounds, best to place that weight on the front axle which can more easily accommodate the extra weight. Motorhomes are always very tail-heavy, one reason why Phoenix deleted the integrated spare tire compartment.