The term "sleeping policeman" is sometimes used for "silent policeman" or "silent cop" in NSW Australia so I found the term somewhat confusing at first.

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Silent cop from Wikipedia

Wth our 2012 Plus 4 it was one of the models with the infamous sagging springs and it was grounding out on things even before it left the factory. You can imagine how many times we "touched down" once loaded with luggage and on the way home.

A bit of study revealed that the current recommendations for speed humps is a height of 8cm plus or minus 1 cm. This was reduced from a previous standard of a maximum of 10cm which means that many older speed humps can be as high as 10 cm.

Our Plus 4, as delivered, had an unloaded ground clearance under the gearbox crossmember of 9cm!!!!!! scared

There was one speedhump that we could not cross at all and we had to back up and go the wrong way up the exit road to get around it.

Since then the problem has been largely resolved by fitting 5 link rear suspension and the taller 195/65 R15 tyres which are about 1 cm taller than the original 195/60 R15 tyres.

Last edited by Gambalunga; 01/07/24 07:11 AM.
Peter

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