Shippers said:
Wrong...changing tyre size affects mileage and speed so you have to alter recording methods...using gps is not the option as doesnt change vehicles original equipment...is a non working speedo an mot fail?...a gps reading on a rolling road is non functional...tyre size affects rolling radius which affects speedo reading does it not?...
Click to expand...
I don’t believe an MoT checks for a working speedo. And certainly does not check for the accuracy of any speedo.

maybe you’d like to pick your toys up and pop them back in the pram now ;)
 
300bhp/ton said:
Which as we don’t live in a Nazi state is no problem at all ;)
Click to expand...
Yeah, the perfect attitude right up to the point you wonder what's in the green envelope (i did) and upon opening find enclosed an invitation to (if you're lucky) attend a speed awareness course near you and details of where to send the cheque...:(
 
300bhp/ton said:
I don’t believe an MoT checks for a working speedo. And certainly does not check for the accuracy of any speedo.

maybe you’d like to pick your toys up and pop them back in the pram now ;)
Click to expand...
It isn't an MOT requirement, just a means of retaining your driving licence...
 
300bhp/ton said:
don’t believe an MoT checks for a working speedo. And certainly does not check for the accuracy of any speedo.
Click to expand...

I would expect an mot inspector to check the speedo if the mileage was the same as last years certificate...but hey ho what do I know here in Portugal the inspection is tuff speedo not showing on rolling road then road test with meter in the vehicle...wrong size factory tyres fail...brakes fail on inspection 4wks to sort not allowed to carry passengers...but it's a backward safety concieous country regarding vehicle road worthiness!...
 
yfo866 said:
Yeah, the perfect attitude right up to the point you wonder what's in the green envelope (i did) and upon opening find enclosed an invitation to (if you're lucky) attend a speed awareness course near you and details of where to send the cheque...:(
Click to expand...
Sorry to hear that. But that just sounds like speeding. A speedo that shows a slightly different speed to a standard vehicle is not really the same thing. And many speedos over read anyhow. You may find it is more accurate on bigger tyres.
 
yfo866 said:
It isn't an MOT requirement, just a means of retaining your driving licence...
Click to expand...

It is an mot requirement to have a working speedo anything pertaining to the workings of the vehicle must work except non safety items...it appears some overlook it...remember if the inspector is unsure about anything it's fail...not tested...a bit like egr debate not being able to remove covers...
 
Shippers said:
I would expect an mot inspector to check the speedo if the mileage was the same as last years certificate...but hey ho what do I know here in Portugal the inspection is tuff speedo not showing on rolling road then road test with meter in the vehicle...wrong size factory tyres fail...brakes fail on inspection 4wks to sort not allowed to carry passengers...but it's a backward safety concieous country regarding vehicle road worthiness!...
Click to expand...
The odometer (shows mileage) is not the same thing as a speedo. The odo reading is noted for an MoT but that is all.

let’s face it. If your speedo breaks (which normally houses the odometer). You may have to replace it with another. If they don’t make them anymore. You’d have to fit a used one.
 
300bhp/ton said:
Sorry to hear that. But that just sounds like speeding. A speedo that shows a slightly different speed to a standard vehicle is not really the same thing. And many speedos over read anyhow. You may find it is more accurate on bigger tyres.
Click to expand...

Bollocks...
 
Shippers said:
It is an mot requirement to have a working speedo anything pertaining to the workings of the vehicle must work except non safety items...it appears some overlook it...remember if the inspector is unsure about anything it's fail...not tested...a bit like egr debate not being able to remove covers...
Click to expand...
This is completely wrong. An MoT in the UK checks for specific items. Not everything has to work.

Section 7.8 is for the speedo.
https://www.gov.uk/guidance/mot-ins...d-light-commercial-vehicles/7-other-equipment
 
Shippers said:
Wrong...changing tyre size affects mileage and speed so you have to alter recording methods...using gps is not the option as doesnt change vehicles original equipment...is a non working speedo an mot fail?...a gps reading on a rolling road is non functional...tyre size affects rolling radius which affects speedo reading does it not?...
Click to expand...
Just checked an MOT check sheet and Class 5 vehicles DO have their speedo checked.
I'm guessing that a Class 5 is bigger than a normal PLG car as i've NEVER had my speedo checked for working let alone accuracy since 1982 when i started driving.
mot check sheet.jpg
 
Shippers said:
I would expect an mot inspector to check the speedo if the mileage was the same as last years certificate...but hey ho what do I know here in Portugal the inspection is tuff speedo not showing on rolling road then road test with meter in the vehicle...wrong size factory tyres fail...brakes fail on inspection 4wks to sort not allowed to carry passengers...but it's a backward safety concieous country regarding vehicle road worthiness!...
Click to expand...
Don't forget that the 'speedo' measures speed and the odometer measure distance travelled. In the past i've had a speedo cable break which renders both inoperable but have also had the speedo gubbins inside go twang so i had no 'speed' but still measured distance. The two functions don't always have the same source of drive.
 
yfo866 said:
Don't forget that the 'speedo' measures speed and the odometer measure distance travelled. In the past i've had a speedo cable break which renders both inoperable but have also had the speedo gubbins inside go twang so i had no 'speed' but still measured distance. The two functions don't always have the same source of drive.
Click to expand...

But the oversized tyre size does which was my original point affects both speed and distance covered...
 
If you carry a spare it should be the same size and rating as the other tyres. If you don't carry one at all, that's fine
 
kermit_rr said:
If you carry a spare it should be the same size and rating as the other tyres. If you don't carry one at all, that's fine
Click to expand...

so how does space savers work then...my Seciento has a skinny tyre spare my Smart fortwo has no spare but a kit and compresser as standard...
 
Shippers said:
so how does space savers work then...my Seciento has a skinny tyre spare my Smart fortwo has no spare but a kit and compresser as standard...
Click to expand...
Space savers are not regular tyres and specifically built for the job. With a low speed rating to cope
 
You must log in or register to reply here.

Similar threads

N
Series 3 Rubbing strip-spare wheel retention
Replies
2
Views
568
British Leyland Rover
British Leyland Rover
B
Discovery 5 tyre size suggestions
Replies
1
Views
550
marjon
marjon
L
Mantec Swing Away Wheel Carrier Parts
Replies
0
Views
590
Lumby84
L
ChrisBduck
3.6L Land rover 90
Replies
2
Views
649
ChrisBduck
ChrisBduck
shadyadie
Spare wheel is fouling the bumper
Replies
11
Views
1K
sierrafery
sierrafery