Home

   Log in or Register



Insurance Quotes
forums Campsite Search Comp Directory tips virtual brochure Profile
Tent and Awning Reviews Competitions Caravans and Motorhomes For Sale Shopping Diary Advent Calendar

Advertisement

Message Forums
Welcome Guest Register Login Search The Forum Posts Since Last Visit
 Reception - All Forums
   Caravans and Caravanning -  Caravan Repairs, Servicing and Maintenance 		Share   Post on X / Twitter  Share on Facebook  Email  Printer Friendly Version Print
Subject Topic: tyre pressures
Page:  1  2 Post Reply Post New Topic
Personarc systems
02/5/2012 at 9:59pm
 Location: None Entered
 Outfit: http: www.arcsystems.biz View arc systems's Profile View Profile   Reply to arc systems Reply   Quote arc systems Quote  
Joined: 02/12/2003

Diamond Member
Diamond Member

Forum Posts:   4373
Site Reviews Total: 0
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0
Well that does change things, but that depends on the load index number of the tyres you bought?
There are actually four car type tyres of this size so four load index numbers, 78 and 79 which are no good, then two reinforced tyres at 82 and 83, 82, has a max load of 950kg at 39psi and 83 is 974kg at 41psi


Persontherigbys
14/6/2012 at 7:46am
 Location: 
 Outfit:  View therigbys's Profile View Profile   Reply to therigbys Reply   Quote therigbys Quote  
Joined: 21/5/2011

Silver Member
Silver Member

Forum Posts:   125
Site Reviews Total: 0
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0
Jumping in on this thread - what a minefield....

Our maximum laden weight is 1150kg, our tyres are new and are 165/13 C 8Ply 94/92N stating:
single 1477lbs (670kg)65psi
dual 1389lbs (630kg)65psi

Now 65 psi seems rather high, but then I have to remember that's for a loaded caravan of 1260kg.

So for our caravan working out by formula would be
single 59psi
dual 56psi

now that is for fully laden so do I deduct 6-8 psi from the dual to give correct tyre pressure??

Strangely the handbook states 175SRx13 (but was told by swift the 165x13 was fine) reinforced radial with tyre pressure of 42.

oh...I believe they are currently set at 55psi

-------------
Regards
Karen


PersonAl+Mel
14/6/2012 at 8:33am
 Location: Hants
 Outfit: Fleetwood Heritage 640 EB & ML270 View Al+Mel's Profile View Profile   Reply to Al+Mel Reply   Quote Al+Mel Quote  
Joined: 18/9/2010

Platinum Member
Platinum Member

Forum Posts:   1312
Site Reviews Total: 0
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0
Quote: Originally posted by therigbys on 14/6/2012
Jumping in on this thread - what a minefield....

Our maximum laden weight is 1150kg, our tyres are new and are 165/13 C 8Ply 94/92N stating:
single 1477lbs (670kg)65psi
dual 1389lbs (630kg)65psi

Now 65 psi seems rather high, but then I have to remember that's for a loaded caravan of 1260kg.

So for our caravan working out by formula would be
single 59psi
dual 56psi

now that is for fully laden so do I deduct 6-8 psi from the dual to give correct tyre pressure??

Strangely the handbook states 175SRx13 (but was told by swift the 165x13 was fine) reinforced radial with tyre pressure of 42.

oh...I believe they are currently set at 55psi

The "Dual" figure applies to vehicles with two tyres on the same side, same axle. The single figure is the one you want.

As I see it the formula is 65/670 x 575 = 55.78 for your setup. You can then knock off 10% as its a caravan giving 50.2. 50psi would be right for your MAW of 1150.

55psi would be safe - your van would just have a harder ride.


Persontherigbys
14/6/2012 at 9:13am
 Location: 
 Outfit:  View therigbys's Profile View Profile   Reply to therigbys Reply   Quote therigbys Quote  
Joined: 21/5/2011

Silver Member
Silver Member

Forum Posts:   125
Site Reviews Total: 0
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0
Thanks so much Al+Mel, much appreciated - and for explaining the "dual".

Our first voyage this weekend!

-------------
Regards
Karen


Personarc systems
14/6/2012 at 9:32am
 Location: None Entered
 Outfit: http: www.arcsystems.biz View arc systems's Profile View Profile   Reply to arc systems Reply   Quote arc systems Quote  
Joined: 02/12/2003

Diamond Member
Diamond Member

Forum Posts:   4373
Site Reviews Total: 0
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0
Quote: Originally posted by Al+Mel on 14/6/2012

Our maximum laden weight is 1150kg, our tyres are new and are 165/13 C 8Ply 94

As I see it the formula is 65/670 x 575 = 55.78 for your setup. You can then knock off 10% as its a caravan giving 50.2. 50psi would be right for your MAW of 1150

55psi would be safe - your van would just have a harder ride.


The correct pressure for the above tyres and 1150kg is 54psi, what I don't understand is knocking 10% off?

Only if the vans loaded lighter than 1150kg should you consider dropping the pressure.
For instance, 51psi is suitable for 1100kg and 48psi for 1050kg.


Advertisement



Personstuartggray
18/6/2012 at 10:01pm
 Location: Dunfermline
 Outfit: Coachman Pastiche 560 4 View stuartggray's Profile View Profile   Reply to stuartggray Reply   Quote stuartggray Quote  
Joined: 30/5/2004

Silver Member
Silver Member

Forum Posts:   188
Site Reviews Total: 0
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0
My 1990 Swift Corvette which has a delivery weight of 750kgs and a max weight of 950kgs uses car tyres, namely 165SR x 13 at 33 p.s.i. , and that is straight from the manual.


Personarc systems
18/6/2012 at 11:01pm
 Location: None Entered
 Outfit: http: www.arcsystems.biz View arc systems's Profile View Profile   Reply to arc systems Reply   Quote arc systems Quote  
Joined: 02/12/2003

Diamond Member
Diamond Member

Forum Posts:   4373
Site Reviews Total: 0
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0
Which goes to Show Stuart how Manufactures, until very recently, skimped on selection of tyres, Swift would not fit those today
Your tyres are at their maximum pressure and load, today a further 10% margin is given and 175R13 tyres would be fitted, a pair of these comfortably carrying 950k at 30psi


Personkendo51
02/7/2012 at 1:18pm
 Location: Larne
 Outfit: Freelander TD4 Bailey Pagent View kendo51's Profile View Profile   Reply to kendo51 Reply   Quote kendo51 Quote  
Joined: 14/4/2012

Standard Member
Standard Member

Forum Posts:   36
Site Reviews Total: 1
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0

Hi , just jumping in here could someone let me know what the correct tyre pressure is for my van is it 65PSI ?

Van : 2002 Bailey Pagent single axle total weight 1340kg

Tyres: Hancook 175 x R13c ( 8ply ) 97/95Q ( Max load as states on tyre 730kg single at 65PSI


Personkendo51
02/7/2012 at 1:35pm
 Location: Larne
 Outfit: Freelander TD4 Bailey Pagent View kendo51's Profile View Profile   Reply to kendo51 Reply   Quote kendo51 Quote  
Joined: 14/4/2012

Standard Member
Standard Member

Forum Posts:   36
Site Reviews Total: 1
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0

I have worked it out to 59.65 p.s.i

65psi x 1340kg / 730 x 2 +59.65 is this correct


PersonAl+Mel
02/7/2012 at 4:40pm
 Location: Hants
 Outfit: Fleetwood Heritage 640 EB & ML270 View Al+Mel's Profile View Profile   Reply to Al+Mel Reply   Quote Al+Mel Quote  
Joined: 18/9/2010

Platinum Member
Platinum Member

Forum Posts:   1312
Site Reviews Total: 0
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0
Its right by the formula. Gary is going to say the formula gives too high a pressure - so - 56psi ?


Advertisement



Personkendo51
02/7/2012 at 11:47pm
 Location: Larne
 Outfit: Freelander TD4 Bailey Pagent View kendo51's Profile View Profile   Reply to kendo51 Reply   Quote kendo51 Quote  
Joined: 14/4/2012

Standard Member
Standard Member

Forum Posts:   36
Site Reviews Total: 1
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0
Who is Gary ? 17 what is the idea of the pressure drop?


PersonAl+Mel
03/7/2012 at 9:15am
 Location: Hants
 Outfit: Fleetwood Heritage 640 EB & ML270 View Al+Mel's Profile View Profile   Reply to Al+Mel Reply   Quote Al+Mel Quote  
Joined: 18/9/2010

Platinum Member
Platinum Member

Forum Posts:   1312
Site Reviews Total: 0
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0
Gary - Arc Systems Carver Guru. Knows a lot about caravan related stuff and is THE man for Carver repairs.

See post 5 here;

Tyre Pressures

Caravan manuals do seem to give a slightly lower figure than the formula creates. Our twin axle 'van comes out at 40 psi by the formula but we have 36 psi written on the wheel arches.


Personkendo51
03/7/2012 at 3:13pm
 Location: Larne
 Outfit: Freelander TD4 Bailey Pagent View kendo51's Profile View Profile   Reply to kendo51 Reply   Quote kendo51 Quote  
Joined: 14/4/2012

Standard Member
Standard Member

Forum Posts:   36
Site Reviews Total: 1
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0
Ok , many thanks for all your help will run at 56psi


Personarc systems
03/7/2012 at 10:14pm
 Location: None Entered
 Outfit: http: www.arcsystems.biz View arc systems's Profile View Profile   Reply to arc systems Reply   Quote arc systems Quote  
Joined: 02/12/2003

Diamond Member
Diamond Member

Forum Posts:   4373
Site Reviews Total: 0
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0
No, chart says 57psi for 1315kg, I'd use 58psi for 1340kg

As can be seen then, The formula is pretty close at near maximum load/pressure, it only gets progressively inaccurate, the further away you get from the maximum load, therefore required pressure. BUT always gives a higher than required pressure



In order to post a reply you will need to register, or if already registered please log in here

  Prev       Next

Jump To Page:  1  2

Quick Links - All Forums - Caravan Repairs, Servicing and Maintenance - Top of Page

Printer Friendly Version Printable version      Share   Post on X / Twitter  Share on Facebook  Email


Latest News, Discounts and Competitions  see all...

5175 Visitors online !

Free UKCampsite.co.uk Window Sticker  -  Recommend to Friend  -  Add a Missing Campsite

[Message Forums]  [Caravan Sites & Camping]  [Company Listings]  [Features / Advice]  [Virtual Brochure]  [Shop!]
[Reception]  [Competitions]  [Caravans & Motorhomes For Sale]  [Event Diary]  [Contact Us]  [Tent Reviews] 



Please note we are not responsible for the content of external sites & any reviews represent the author's personal view only. Please report any error here. You may view our privacy and cookie policy and terms and conditions here. All copyrights & other intellectual property rights in the design and content of this web site are reserved to the UKCampsite.co.uk © 1999 - 2024


Advertisement
Advertisement


UKCampsite.co.uk
2024 Advent Calendar

Advent Calendar

24 Daily Prizes PLUS a Christmas Day Star Prize worth £999

Request a Reminder