Tyre upgrade
22 replies
Rocky 2 buckets replied on 27/09/2020 12:13
Posted on 27/09/2020 11:56 by peedeeI can well understand now why a lot of folk refuse to offer help, there are way too many nit pickers
I cannot agree with you in this case R2B. BJ was just clarifying a point.
peedee
LLM replied on 27/09/2020 12:13
Posted on 27/09/2020 09:18 by Norman16Hi I read in one of the discussions that I can fit slightly wider tyres this will help with pay load,could someone comment on this please. I have a neismann bischoff alto on a fiat chassis.
The tyres at moment are 215 70 15 what could I go up to thanks
Posted on 27/09/2020 12:13
If you talk to Sv Tech (SvTech) they will advise at no charge. If you then wish to up rate they will provide the necessary documentation / plate for which they do charge.
As an aside you can nominally increase the payload by changing the tyres to a higher load rated tyre but you don't often gain much.
1 person likes this
cyberyacht replied on 28/09/2020 11:06
LLM replied on 28/09/2020 11:19
Posted on 28/09/2020 11:06 by cyberyachtGenerally the cumulative load rating of the tyres is greater than the MTPLM of the vehicle so changing the tyres often merely provides a more comfortable ride or possibly a greater margin of safety.
Lutz replied on 30/09/2020 09:42
Posted on 28/09/2020 11:19 by LLMTrue in many cases. Of course changing the tyres can be one of the steps required to enable the vehicle to be replated to a higher MTPLM.
Lutz replied on 30/09/2020 09:45
Posted on 27/09/2020 09:18 by Norman16Hi I read in one of the discussions that I can fit slightly wider tyres this will help with pay load,could someone comment on this please. I have a neismann bischoff alto on a fiat chassis.
The tyres at moment are 215 70 15 what could I go up to thanks
LLM replied on 30/09/2020 15:18
Posted on 30/09/2020 09:42 by LutzIn practice, replating the MTPLM of a motorhome is much more involved than that of a caravan because it would involve the need to amend details in the V5c.
Posted on 30/09/2020 15:18
Surprising not really that difficult. I wanted to up plate from 4.25t to 4.5t. The van had already been fitted with air suspension and a plate showing 4.5t added.
I spoke to SvTech and they advised. To go to 4.5t just fill out the form included in the V5C, send it and a covering letter and photos of the plates to the DVLA and the V5C will be amended. DVLA advised the same and the job was done. A simple paperwork exercise.
Had I wanted to I could have paid SvTech for a further plate taking the van to 4.7t and they would have dealt with the DVLA on my behalf. No additional physical changes to the van would have been needed.
Had I uprated the tyres from load rating 116 to 120 I could have up plated to 4.8t. Again SvTech would have done all the paperwork but I would have had to provide them with photo evidence of the tyre change.
In each case the chassis and axle limits allowed the change.
Phishing replied on 01/10/2020 22:20
Posted on 27/09/2020 09:18 by Norman16Hi I read in one of the discussions that I can fit slightly wider tyres this will help with pay load,could someone comment on this please. I have a neismann bischoff alto on a fiat chassis.
The tyres at moment are 215 70 15 what could I go up to thanks
Posted on 01/10/2020 22:20
Wider tyres have no effect on load rating. If you post the load rating for your current tyre then you can search for higher load rated tyres. Without knowing the current load rating or the axle loads it is not possible to determine what is suitable.
From the info you have give there is probably a higher load rated tyre that is suitable that is slightly wider but lower aspect ration.
Lutz replied on 02/10/2020 11:15
Posted on 30/09/2020 15:18 by LLMSurprising not really that difficult. I wanted to up plate from 4.25t to 4.5t. The van had already been fitted with air suspension and a plate showing 4.5t added.
I spoke to SvTech and they advised. To go to 4.5t just fill out the form included in the V5C, send it and a covering letter and photos of the plates to the DVLA and the V5C will be amended. DVLA advised the same and the job was done. A simple paperwork exercise.
Had I wanted to I could have paid SvTech for a further plate taking the van to 4.7t and they would have dealt with the DVLA on my behalf. No additional physical changes to the van would have been needed.
Had I uprated the tyres from load rating 116 to 120 I could have up plated to 4.8t. Again SvTech would have done all the paperwork but I would have had to provide them with photo evidence of the tyre change.
In each case the chassis and axle limits allowed the change.
Posted on 02/10/2020 11:15
Out of interest, who is the manufacturer named on the revised plate that SvTech issued? Unless the original manufacturer covered the uprated weight by an appropriate amendment in his type approval documentation he can no longer carry any product liability so presumably SvTech is then responsible and is then the named manufacturer. Is that so?
bigherb replied on 02/10/2020 12:27
Posted on 02/10/2020 12:27
In theory, you could fit 225/65R15 which are 8mm smaller diameter or 235/65R15 which are 4mm larger in diameter, subject to being suitable for the width of the rim. But a quick look they don't seem to be available in commercial rated tyre, so it looks like what you have got is the main option.
Norman16
Motorhomer