Reply
 
Thread Tools Search this Thread
 
Old 21 July 2013, 13:48   #1
Member
 
Country: UK - England
Length: 5m +
Join Date: Jun 2013
Posts: 7
Why have my tyres worn ?

Hi
I wonder if anyone can help answer a question for me. I recently purchased second-hand a 5.0 metre Bombard rib on an Hallmark Indespension non-braked trailer. The entire rig was originally supplied new in 2007 by Pacer Marine, so I'm making the assumption that trailer is sufficient for the boat.

Yesterday I drove the rib about 170 miles to the coast and when I launched the rib I noticed that the inside edge of one of the tyres was completely warn down and out of shape. The other tyre showed similar signs of wear but was not as bad.

What could cause this?

The tyres did appeared a little soft but they were at the same pressure that I'd previously towed at when I'd checked them about a month ago. I can't remember the exact pressure, but they were about 28 psi. Could the pressures have been too low?

The wheel nuts were all tight (I'd checked with the wrench) but there was a very slight 'clonk' movement/play when I heaved on the wheels just to check before setting off (as you do!). Could there be play in the bearings causing them to 'toe-out'.

Since buying the rig I've towed it about 700 miles and I'm 80% certain that the tyres were fine until this last trip.

Any answers would be appreciated. I'm not a mechanic and have no in-depth knowledge of trailers, I just do as the books tell me and like to keep all my gear in top-notch condition, so nice simple advice would help. Thanks.
__________________

__________________
Flybob is offline   Reply With Quote
Old 21 July 2013, 14:07   #2
RIBnet admin team
 
Poly's Avatar
 
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: 2 stroke YAM 20 HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 9,457
That sound like a low pressure for a trailer tyre to me? I also wouldn't tow something 170 miles with a "clonk" from the bearings...

...hopefully one of the trailer gurus will be able to confirm better - but I suspect it needs looked at.
__________________
Poly is offline   Reply With Quote
Old 21 July 2013, 14:19   #3
Member
 
mister p's Avatar
 
Country: UK - England
Town: LONDON
Make: SR4/ZODIAC/3D
Length: 4m +
Engine: 30T/40T
Join Date: Oct 2011
Posts: 1,433
Quote:
Originally Posted by Poly View Post
That sound like a low pressure for a trailer tyre to me? I also wouldn't tow something 170 miles with a "clonk" from the bearings...

...hopefully one of the trailer gurus will be able to confirm better - but I suspect it needs looked at.
Agreed, long way to tow with a "clonk", assuming that you'd tugged at the wheels hoping not to hear a "clonk".

Pressure seems low also. However, to your advantage, be aware that some trailer tyres are cheaper and nastier than cheap and nasty things. Usually just bunged on for the trailer to have some black round things on it's wheels.
__________________
mister p is offline   Reply With Quote
Old 21 July 2013, 21:34   #4
Member
 
Country: Other
Town: Stanley, Falkland Is
Boat name: Seawolf
Make: Osprey Vipermax 5.8
Length: 5m +
Engine: Etec 150
Join Date: Mar 2006
Posts: 3,656
Possibilities are axle bent or suspension unit somehow damaged or twisted letting the tyres 'toe out' - same effect as poor tracking on a car - wear on the inside edges. If it's just slack in the bearings allowing them to toe out enough to wear the tyres, the bearings need changing v urgently!

New tyres needed, check the weight rating is sufficient and I also think you want a lot more pressure in them. I need about 25-30psi in the 235/70R16 LT 4x4 tyres I use on my boat trailer, needed about 60psi minimum in the wee 13" ones that came on the trailer.
__________________
A Boat is a hole in the water, surrounded by fibreglass, into which you throw money...

Sent from my Computer, using a keyboard and mouse
BogMonster is offline   Reply With Quote
Old 22 July 2013, 00:00   #5
Member
 
Country: UK - England
Town: Plymouth
Length: 10m +
Join Date: Nov 2007
Posts: 356
Tyre pressures are definetly to low, which won't be helping. If I was you, I would book the trailer in for a professional service, so that the bearings, suspension units, etc can all be checked to give you peace of mind.
__________________
South West Boat Transport
Any boat upto 50ft across the UK, Europe & Scandivavia
http://www.boat-transportation.co.uk
SW Boat Transport is offline   Reply With Quote
Old 22 July 2013, 04:45   #6
AJ.
RIBnet supporter
 
AJ.'s Avatar
 
Country: UK - England
Town: Warwickshire
Boat name: Impulse
Make: Ribcraft
Length: 5m +
Engine: Suzuki 140
Join Date: Sep 2011
Posts: 1,020
Sound under inflated to me. Check the PSI rating on the tyre wall. Under inflated tyres will cause the edge of the tyres to wear. Overinflated will cause the middle of the tyres to wear. Under inflated tyres will also run hot causing a potential blow out I check mine at the start of every trip. A clonk does not sound right have a look at the sticky threads under towing section by trailer guy loads of easy to understand advise on checking pressures and how to test bearings and acceptable movement.
__________________
AJ. is offline   Reply With Quote
Old 22 July 2013, 07:13   #7
Member
 
Bern Hanreck's Avatar
 
Country: UK - England
Town: Essex
Boat name: La Bamba
Make: Ribcraft
Length: 5m +
Engine: F100 Yam / 5Hp Suz
Join Date: Oct 2002
Posts: 652
Quote:
Originally Posted by BogMonster View Post

New tyres needed, check the weight rating is sufficient and I also think you want a lot more pressure in them. I need about 25-30psi in the 235/70R16 LT 4x4 tyres I use on my boat trailer, needed about 60psi minimum in the wee 13" ones that came on the trailer.
Bogmonster is right ! Apart from rectifying any other problems , the Caravan Club advise NOT to use any tyres that are more than seven years old , regardless of how pristine they appear to be !

I suspect that most caravan tyres lead a much easier life than boat trailer equivalents !
__________________
Bern Hanreck is offline   Reply With Quote
Old 22 July 2013, 07:35   #8
Member
 
Trailer Guy's Avatar
 
Country: UK - England
Town: Hampshire
Boat name: Altea 2
Make: Narwhal
Length: 5m +
Engine: 90 Mariner
Join Date: Aug 2011
Posts: 843
Hi

'clonk' will very likely be bearings.

If you have an unbraked Indespension Coaster Swing trailer (you can tell the difference between these and the unbraked Roller Coaster by it having blue (usually) plastic mudguards) then you'll likely have the following tyres:


5.00 x 10 6ply tyres. These have a psi rating (60mph) of 50psi (3.5bar)

If you have an Indespension unbraked Roller Coaster (more heavy duty than the 'Swing' with metal mudguards) you'll likely have the following tyres:

145R12 then the pressure should be circa 42psi

Hope that helps. All the best.
Trailer Guy is offline   Reply With Quote
Old 22 July 2013, 10:57   #9
Member
 
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,636
One other possibility is heavy load having bent the axle. If the normal rig load is close to the axle weight rating and rain water is allowed to accumulate, the rig can exceed the axle's limit and torque things out of shape.

jky
__________________
jyasaki is offline   Reply With Quote
Old 22 July 2013, 17:09   #10
Member
 
Country: UK - England
Length: 5m +
Join Date: Jun 2013
Posts: 7
Thanks everyone for the replies - and thanks 'Trailer Guy' for the pressure specs. It is the Coaster Swing with the blue mudguards.

The whole rig was in very good nick when I bought it, with a good service history and very little use. I had the engine serviced anyway and that turned to be 100%, but I think I let that lull me into assuming everything was okay. Gawd only knows how I got the tyre pressures so wrong - I even phoned Indespension so I must have got my wires crossed about their recommendations. I've had bigger boats for many years and it's along time since I trailored a boat, but it's all coming back to me now!

Rest assured I'll get the trailer serviced and the tyres replaced.

Anybody know of anybody good at trailer servicing in the Lymington area? The boat is in the water for a week, so the trailer's sitting idle.

Cheers all.
__________________

__________________
Flybob is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 23:06.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.