Boating NZ - - Feature -

Be­fore de­cid­ing which sys­tem is best for your trailer/ve­hi­cle, note that it all be­comes ir­rel­e­vant if the in­di­vid­ual trailer com­po­nents aren’t cor­rectly rated for their ap­pro­pri­ate loads.

Trailer com­po­nents need to func­tion as a whole to make the trailer suit­able to carry spe­cific loads safely. From the de­sign of the chas­sis and draw­bar, the spring and axle rat­ing, the hubs, rims and tyres – right through to the safety chains and shack­les – they should be rated equal to (or bet­ter still, ex­ceed) the de­sired gross trailer load­ing.

For ex­am­ple – it is folly to build a sin­gle-axle trailer for 2,000kg GVM and fit 1,500kg rated hubs and stubs or 1,000kg rated springs. Mur­phy’s Law says the weak­est part of your trailer will fail at the most in­con­ve­nient mo­ment (rainy night with a fully-loaded trailer on the side of the road in the mid­dle of nowhere).

Check the man­u­fac­turer’s rec­om­mended ratings for each com­po­nent you fit to your trailer. The un­der-de­signed, un-rated or low­est-rated com­po­nent will al­ways be the weak­est link on your trailer. Be wary of cheap or un­branded com­po­nents.

Be­fore fit­ting brakes to your ex­ist­ing trailer, en­sure that all the other com­po­nents are up to the task.

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