What size wheels and tyres for C18 Mark 3

User avatar
maxm
Old Fart
Posts: 3797
Joined: Tue Feb 24, 2004 7:48 am

Re: What size wheels and tyres for C18 Mark 3

Postby maxm » Tue Apr 05, 2016 8:58 pm

Luka, If you do bite the bullet and decide to go for hydraulics then I can recommend a flexible line from this mob. It should be much cheaper than getting a specialist brake mob to install the metal tubing and mine has worked just fine over the last few years.

Of course you'll need new calipers and a new hitch as well. It's just money... :roll: :wink:
Max
C22/54 "Katrina II"
Mitsubishi PC Challenger auto

"It could easily be accomplished viz a coppuder"
(Dr Strangelove)

Luka
Old Fart
Posts: 154
Joined: Wed Mar 10, 2010 2:36 pm
Location: Gladesville NSW

Re: What size wheels and tyres for C18 Mark 3

Postby Luka » Fri Apr 08, 2016 4:06 pm

Went to trailer shop today. They don't adjust boat height on trailer so I'd need to do that first.
But he suggested that I place the axle UNDER the springs instead of over to lift the whole assembly by 120mm.
Then i may get away without adjusting the roller heights.
Has anyone any thoughts on this?
I spoke to Verne and he said don't do it because by raising the trailer at the axle by 120mm, remembering the towball stays constant will raise the rear about 200mm due to the angle of the trailer. Add to that the extra couple of inches for the tyre size increase and you'll have trouble launching.

Also. The trailer shop pointed out that my compliance plate says "gross trailer mass 1020kg". This must obviously have been based on the original rims.
I'll bet most trailers have the same issue, even those with bigger wheels as I suspect most would not have bothered to get the rating fixed.
To get the required rating I would need a heavy duty axle (which I have), 7 leaf springs (I have 6) the new wheels, hubs and brakes. The chassis should be OK.
I'd need to get an RTA inspection and certificate to get the compliance amended.
I'm sure there are insurance implications of having an under rated trailer so I'm going to have to do it but first I need to find out from the RTA if there is anything else required so I don't need to do it over.
Luka
C18-466 / Druthers

User avatar
paul trotter
Careel News Foreign Correspondent
Posts: 2324
Joined: Thu May 06, 2004 7:59 pm
Location: Brisbane, Sandgate

Re: What size wheels and tyres for C18 Mark 3

Postby paul trotter » Fri Apr 08, 2016 9:45 pm

Oh god!
Paul Trotter
Nellie C18/472
Vice Commodore North CCYA

Luka
Old Fart
Posts: 154
Joined: Wed Mar 10, 2010 2:36 pm
Location: Gladesville NSW

Re: What size wheels and tyres for C18 Mark 3

Postby Luka » Thu Apr 21, 2016 8:24 pm

So today I visited the original trailer manufacturer, Tracer Trailers, in the hope that they may be able to revise the trailer rating post alterations.
The short answer was, no.
Essentially because it's a C-section chasis and a tilt trailer and had repairs done to it in the past, he could not certify for the increased load capacity as the other components would not meet current regulations.
In it's current form it's still compliant as it complied at the time of manufacture.
Only issue is that my boat and trailer total mass is higher than the rating.
Perfectly fine for say Mk1 or 2 careel but not Mk3.
So it seems a new trailer might be where I'm headed.

So now I have a bunch of new questions to find answers for.
Does anyone out there have a relatively new trailer?
What make and how much did you pay?
Tilt trailers no longer make regulation, and pictures I see on websites of rigid trailers appear to have multi roller assemblies at the rear to guide the boat on.
Does anyone have a rigid trailer and how do you find launching and retrieving?
If you have pictures of your trailer, maybe you could email them to me at lukamikr@gmail.com
Luka
C18-466 / Druthers

Ukuri
Old Fart
Posts: 121
Joined: Mon Dec 07, 2009 11:21 pm
Location: Brisbane

Re: What size wheels and tyres for C18 Mark 3

Postby Ukuri » Fri Apr 22, 2016 11:16 am

Before you do anything contact your local ((NSW?) Dept of Motor Transport and ask if them about the legality or otherwise of tilt trailers.
It's my understanding that new tilt trailers are still legal but the trailer manufacturers are unwilling or unable to manufacture them. (QLD)
Your DMT should be able, or at least point you in the right direction, to get a set of design requirements for small trailers.

Good Luck

User avatar
maxm
Old Fart
Posts: 3797
Joined: Tue Feb 24, 2004 7:48 am

Re: What size wheels and tyres for C18 Mark 3

Postby maxm » Fri Apr 22, 2016 1:42 pm

Did the trailer guy happen to mention what the problem is with C-frame? That's a surprise - my trailer is C frame and tilt and is obviously built for a heavier boat than even a Mk III. On the other hand, my trailer doesn't have a compliance plate. Which could be a good thing from the sound of things!
Max
C22/54 "Katrina II"
Mitsubishi PC Challenger auto

"It could easily be accomplished viz a coppuder"
(Dr Strangelove)

Ukuri
Old Fart
Posts: 121
Joined: Mon Dec 07, 2009 11:21 pm
Location: Brisbane

Re: What size wheels and tyres for C18 Mark 3

Postby Ukuri » Fri Apr 22, 2016 8:13 pm

This is what you are looking for
https://infrastructure.gov.au/roads/veh ... _01_b.aspx

Note that section 23.3 says

There are no specific body structural requirements, but the trailer must be safe and fit for purpose.

Note
It is suggested as a minimum that the Manufacturer should be able to demonstrate that the structure is capable of supporting the designed payload with a safety factor of at least 3 for highway use and a safety factor of 5 for off road use.


So the builder who told you it wasn't legal to build a tilting trailer was misleading you and a call to your local Office of Fair Trading might be in order. It wont be of much use to you though as who would want a trailer built by someone who has misled them?

As to the practicalities of getting someone to build you one: that may be another story.
Possibly your best bet is to look at lots of trailers, particularly those that actually work well, and copy one.
The sad fact is that unless you are competent yourself, or have reasonable access to someone who is, then it is going to be expensive and difficult to get a new suitable sailing boat trailer built.

Try contacting INMA on Trailer Sailer Place. He may be able to provide you with sensible material advice.

MichaelC
Land Lubber
Posts: 2
Joined: Sun Apr 03, 2016 8:00 pm

Re: What size wheels and tyres for C18 Mark 3

Postby MichaelC » Sat Apr 23, 2016 2:41 pm

Tracer Trailers and Mackay trailers seem to make them.

Luka
Old Fart
Posts: 154
Joined: Wed Mar 10, 2010 2:36 pm
Location: Gladesville NSW

Re: What size wheels and tyres for C18 Mark 3

Postby Luka » Tue Apr 26, 2016 9:17 pm

Definitely not Tracer, I went to see them this weekend. It was Tracer that told me they no longer meet regulation.
I've sent an email question to RMS to find out why.
None the less, all the manufacturers who's web sites I have checked don't seem to make them so it may be a mute point.
Luka
C18-466 / Druthers


Return to “Technical Articles”

Who is online

Users browsing this forum: Baidu [Spider] and 1 guest