Bikes & a 90????

Anyone use there 90 for transporting there mountain road bikes about? Theres always the option of taking the wheels off and throwing them in the back, but if theres 2+ that option is no good, so what roof rack systems/rear carrier systems do people use? I've got a spare on the rear door (mud terrain) would a carrier system fit over this?

I got one of these for my disco but not tryed it on the 90 yet. Can't see why it wouldn't fit. It's got the same PCD
John Craddock LTD - 4 BIKE RACK FOR DISCOVERY I BY SIMBARS - JC2134

I use a cycle carrier that clamps on to the tow bar.
It carries mine and missus mountain bikes, whilst 3 kids bikes go in the back. One of the kids bikes is an adult size mountain bike and that goes in diagonally in the back, so I don't need to take any wheels off or anything like that.
The carrier extends enough past the spare wheel to get two bikes on.

Just seen a four way bike carrier mounted on the back of a 110 (pic to follow hopefully) manufactured by Simbars. This guy had it mounted on a swingaway, but it would fit on the door just as easily.

tow bar from pendle is the best..