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powerplus

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Reply with quote  #1 
hi all


     i soon will need some new tyres in my motorhome
i have been offered a used set of 16" ducato wheels and trims from a later ducato and have been told that they will fit my 2012 15" ducato

as i am near  the weight limit i thaught that they may be a good option

just was wandering if anyone had any thaughts

barry
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BurtSner

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Reply with quote  #2 

Go for it. You can run longer lasting tyres ( more rubber on the road) and uprate the spec of tyre to get a better load rating. 


**** CHECK **** the PCD, ie bolt hole sizes and spacings ! 


also check that the bolts are the same, or will come with the new wheels. 


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peejay

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Reply with quote  #3 
Would it make the speedo to over read? Or would lower profile tyres cancel that out?

Pete

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BurtSner

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Reply with quote  #4 

Yes/no/possibly. 

You can find out the rolling tread length from your local tyre company, they will be able to advise fully. 

a larger diameter wheel with a longer rolling length of tread would make your speedo under-read as it covers more ground for the same revolutions. 


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Burstner Nexxo T660 - family fun
1974 Norton Commando
1999 Suzuki Hayabusa
Molly - Chocolate Labrador 
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Exeter, East Devon

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peejay

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Reply with quote  #5 
Quote:
Originally Posted by BurtSner

Yes/no/possibly. 

You can find out the rolling tread length from your local tyre company, they will be able to advise fully. 

a larger diameter wheel with a longer rolling length of tread would make your speedo under-read as it covers more ground for the same revolutions. 



Thanks Simon, yeah, under read, thats wot I mean't. [confused]

Pete

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BurtSner

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Reply with quote  #6 
And of course a slight over-read will be beneficial as it will bring your speedo nearer to being accurate. Mine over-reads about 5 mph at 65mph indicated and is a true 60 (As it must do by law). 
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Burstner Nexxo T660 - family fun
1974 Norton Commando
1999 Suzuki Hayabusa
Molly - Chocolate Labrador 
only a biker understands why a dog hangs its head out of the window
Exeter, East Devon

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tugboat

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Reply with quote  #7 
I put my portable stanav in the car the other day when we visited Lin, and the car speedo was spot on.

I thought that unusual as it has been my experience in the past that vehicle speedos over-read, as Simon says above.

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powerplus

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Reply with quote  #8 
hi pete and all

thanks for the quick reply's they are from a later ducato and the spacing and the hole center is the same as the 15" wheels 

i think i might give tyreman a call to see what they reccomend


barry
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powerplus

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Reply with quote  #9 
hi all

i have spent some time looking at this and came to the conclusion that i would not bother

if i had 16" wheels the nearest tyre that is just slightly taller  would be a 215/75/16 and the extra load rate is about 2300kg as the 225/70/15 is 2240kg

the larger 225/75/16 is a lot taller and would affect the final ratio quite a bit


i have also just measured the tread depth and its 6mm on the front and 7.5 on the back at 23k miles so i will swap front to back and get a new set next year

not sure weather to get the conti vanco 100 again or possibly some 4 season next time

barry

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peejay

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Reply with quote  #10 
The other thing I was wondering about Barry, would the larger sized spare still fit in its holder if you have one.?

Pete

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Mike T

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Reply with quote  #11 
Hi
For Whats it worth my last van was 16" ally wheel Ducato 225/75/16 tires 118 PCD (2019 model) the van before that was a 2012 Ducato  15" wheel when you look at the Fiat tech spect they use the same final drive ratio for Both  also both were 118 PCD

Note maxi chassis 16" wheels are 130 PCD bigger and will not fit its a minefield be careful 
Mike 

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Mike T

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