On Friday, July 17, 2015 at 8:43:15 PM UTC+1, Jonathan St. Cloud wrote:
Anyone have any experience with the option offered by Cobra of mounting the spare under the trailer behind the axial?



I don't have experience of that Cobra option and don't know how it is designed. I have, however, been under a trailer that needed to be jacked up by the roadside to unbolt an under-mounted spare and it was a very worrying experience as passing vehicles blew the trailer about. I would only have an under trailer spare if the the design is such that the spare is in a cradle so that, no matter how flat the tyre, the wheel could be slid out from the side without any need to go or reach underneath.

John Galloway