Hi Serge – Jimnys are not hugely known for ground clearance, as their standard wheels are small. But they are very capable little 4x4s that can go anywhere the big boys can go when it comes to sand, mud and even rocky terrain. The problem with placing mountain bikes on the back is that the Jimny’s DEPARTURE angle will be compromised, so it might be more difficult to exit deep ditches and the like. Also, as with any vehicle, if it is heavily loaded in the first place, the clearance will of course be compromised. That said, I do not think there will be a problem if you pack light and use a high-clearance bike rack – or even investigate putting the bikes on the roof.
Do any of you Jimny owners and others agree with this analysis? We welcome input from anyone who has had to cater for a load that includes a full complement of camping gear AND two mountain bikes.