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Subject Topic: tow balls Post Reply Post New Topic
15/9/2011 at 4:39pm
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Hi, will a standard tow ball be suitable for towing a trailer with an alko hitch


15/9/2011 at 5:32pm
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 in one word -no.

 the alko hitch will only lock on an alko tow ball,as they are a different aspect,they are flat across the top to enable the locking system to engage properly.

 check out the cost on the net for your towbar as there are different types,



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15/9/2011 at 6:19pm
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You need an Alko towball for a trailer with an Alko stabiliser because the distance from the the two bolt holes to the centre of the ball is greater. It is designed this way to enable the stabiliser hitch to swivel otherwise it is likely to foul other parts of the towing vehicle.


15/9/2011 at 7:21pm
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Don't know about the flat top. The problem as tango said is the length of the neck. On a standard one the ball is too close to the bracket and the alko hitch will snag when you turn.

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Steve




15/9/2011 at 7:24pm
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Quote: Originally posted by swiftsure on 15/9/2011

 in one word -no.

 the alko hitch will only lock on an alko tow ball,as they are a different aspect,they are flat across the top to enable the locking system to engage properly.

 check out the cost on the net for your towbar as there are different types,


I think you will find all tow balls are flat on top, as said the Alko ball is further away from the vehicle and the shaft is a different shape to ensure the larger shape of the stabilizer can swivel.

The ball is exactly the same shape and an Alko stabilizer will lock on to a normal ball because i have done it in the past.

If you use a normal ball the stabilizer could be forced off.

Andy



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15/9/2011 at 7:52pm
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Normal Ball

EC Approved 50mm Towball

Alko Ball

Extended Towball for Alko Type Stabiliser Hitches



15/9/2011 at 8:37pm
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Tadger

you said you were going to want to tow a trailer with a Alko hitch

I persume you do not mean the Alko stabiliser hitch ?

if this is what you mean then yes a standard 50mm towball is all you need !



16/9/2011 at 8:49am
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Quote: Originally posted by Big Al on 15/9/2011

Tadger

you said you were going to want to tow a trailer with a Alko hitch

I persume you do not mean the Alko stabiliser hitch ?

if this is what you mean then yes a standard 50mm towball is all you need !


Yes re-reading the OP if it's just a trailer it won't have a stabiliser



16/9/2011 at 2:01pm
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Swiftsure.
All balls should havwe a flat top, as that is the designation they are 50mm. If they are round they are the old 2" balls.

Mr Muffin.
Some people with big trailers fit stabilisers.


17/9/2011 at 1:45pm
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Can you get a tow ball that will fit all


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17/9/2011 at 2:15pm
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An Alko ball is fine for ALL trailers. The only difference, as the photo shows, is that it is skightly higher and further from the mounting face.


19/9/2011 at 5:44pm
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If you have an Alko hitch then you need a Class A50-X towball with a 'D' and 'S' Value greater than or equal to that of the towbar.  A Class A50-X towball is an 'Alko-type' tow ball, but does not necessarily need to be manufactured by Alko.  As far as I'm aware Alko only produce one type of Class A50-X towball.  This has a rating of D = 17KN and S = 150kg.  For most cars this should be sufficient but you would need to check the rating of your tow bar, which is normally on a little sticker on the side of the tow bar.

If you have a Discovery, or maybe other large cars, the towball rating may be higher.  The Witter tow bar for my Discovery is D = 15.8KN, S = 250kg, so the S rating of the Alko manufactured tow ball is insufficient (being a lower rate than the tow bar).  In this, and similar cases, one would need to have a non Alko Class A50-X.  These Alko-type tow balls are available at most tow bar fitters or online from companies such as this here.

The S value of a tow ball/bar refers basically to the noseweight.  Your caravan may only have a maximum noseweight of 100kg or less, but as far as I can work out, if your tow bar has a higher rating then your tow ball must be at least the same as the tow bar.

There should be no problem in using a non-Alko hitch on an Alko-type towball (i.e. your normal trailer), but an Alko hitch must not be used on a standard 50mm towball.  Unfortunately you will need to grease the tow ball when using the trailer and completely remove the grease when towing the caravan with the alko hitch.



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David


19/9/2011 at 7:41pm
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If I recall correctly, all 50mm tow balls have a flat top, the ones with a round top (if you can find one) is an old 2" ball.

They still use 2" tow balls in the US, but I wouldn't like to say whether they have a flat top or not.


19/9/2011 at 8:24pm
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this is also assuming the OP has a flange type ball (as pictured)
A swan neck (ie most removable balls) are also fine with alko stabilising hitches.

its the clearance that's the issue, not the size of the ball.



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