Hi all, I'm thinking of carrying an extra spare wheel on my factory fitted bike rack on the rear of my 2014 Starcraft OB caravan. Weight will be 29kg. Bike rack should be able to carry up to 60kg. My concern would be that like the bikes, the spare wheel would bounce around on rough roads/tracks. However, I guess if the rack can take up to 60 kg and the spare wheel will be 1/2 that it should be ok?? Thoughts ? Regards DOS