MightyBoosh wrote: https://www.supercheapauto.co.nz/p/trojan-trojan-tow-ball-duo-fit---3500kg-1-inch/339108.html |
terrafish wrote:
Yep got one on the back of my van. Very handy and easy. Just make sure you keep the spare ball safe. I keep mine wrapped in a rag with the jack |
MightyBoosh wrote: https://www.supercheapauto.co.nz/p/trojan-trojan-tow-ball-duo-fit---3500kg-1-inch/339108.html |
Dagwood wrote: Drifting slightly, the introduction of the 50mm coupling appears be pointless. They don't carry a higher rating. All it has done is increase confusion and provide an opportunity for someone through ignorance or error to make a potentially fatal mistake. Am I missing something?
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Mr Moritz wrote:
Couldn't agree more. It was done in the change over to metrics. As is typical in NZ we had to change everything. Britain kept gallons and mph. Very easy to put a 50 mm trailer onto a 1 7/8" tow ball there by creating an accident waiting to happen. |
Mr Moritz wrote: First time I encountered 50 mm was after we changed to metrics. There were articles in newspapers about the change. They may have been here previously but I had only seen and used 1 7/8" till metrics. |
bazza wrote:
In retrospect it begs the question of why settle on such an obscure dia as 1 7/8 " rather than a more logical 2 " ? [ They probably designed the coupling at 2 inches and then wanted a ball to fit that and came up with 1 7/8"] Guess there are many such examples in lots of the imperial system suffice to mention but a few :- 303 calibre ammo when reducing by a mere three 1/1000 of an inch would have made it interchangeable with the US allies. Weight :- 16 oz to a pound, 14 pounds to a stone (think that is correct) then to further confuse the issue it takes 112 pounds to make 1 x hundredweight ( go figure ) Currency :- 2 x halfpennies = a penny ... 3 x pennies a thruppence 2 x thruppence = sixpence, 2 x sixpence = a shilling, 10 x shilling = ten shillings ( who would have guessed that ?) 2 x 10 shillings = pound then to continue the illogic 2 x shillings = florin, 1 x florin plus sixpence = half crown, 2 x half crowns = a crown then a pound plus a shilling = a guinnea Measurement :- 32 x 1/32 = one inch, 12 x inch = foot, 3 x feet = a yard then some obscure number of yards = a mile. Volumes :- 20 fluid oz = pint, 2 x pints = quart, 4 x quarts = gallon [All that was drummed into me at a very young age, by teachers walking around with canes in their hands and eager to use them. Imagine if that happened to the kids of today] No I phones or even calculators back then ... we simply worked it all out mentally ... how many youths could do so these days ???
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ofthesea wrote: FWIW the towball size has got nothing to do with fitting to the towbar. There are at least two shaft sizes probably three for ordinary trailers and anyone should be able to get a 50 mm or 1 7/8 ball for around $20 + just need to be sure to get the right shaft size |
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