RRC tyre choice

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DavidRRC

Member
Posts
18
Location
Dumfriesshire
Hi, I recently bought a 1995MY RRC. (Vogue) It came with alloy wheels which are genuine Land Rover and marked 7Jx16x33 OAH2. They have BFG Mud Terrain 235x85R16. It also had a 2" lift (yellow Britpart kit) and 30mm wheel spacers. It looked too tricked up for me so .....
I have removed wheel spacers and fitted standard suspension to the front (rear will be done this weekend hopefully).
The tyres just catch the front wheel arch when going over bumps so I need to change something!

Questions.

What wheels and tyres would have been fitted as standard from new? Is a 7Jx16x33 OAH2 good for a standard RRC? Whats a good size of tyre (All Terrain)?

Thanks
David
 
blue beasty said:
Never had a car that doesn't read approx 10% over actual speed....apart from Series that generally mean guessing the average position of a wildly fluctuation needle :confused:
Click to expand...

Speedo regs have changed but i know what you mean about fluctuating needles on cable driven units. However that is down to poor maintenance. Free off the sticky flicky cable. :D
 
wammers said:
Tell that to the coppers when you are doing 60 indicated in a 60 zone and your actual speed is a little over 65.
Click to expand...
Speedo more than likely over reads anyway, mine all have, can always check it with sat nav, my disco 2 on all standard wheels and tyres over reads by 5mph at 70
 
Older Classic with the angle drive at the back of the speedo the cause of flickering needle can be the old grease in the drive.
Flushing & then spray grease to try & get some fresh in will work.
If you are VERY careful & with a fair element of luck you can remove the crimped in end cap & clean it properly - but it's risky as you can damage the housing.

Last speedo issue on mine - 1986 - was the very front end of the rear long half of the cable snapped. Mine has two, a long one from the transfer to a connector in the driver's footwell & a short one from that to the speedo itself.
 
landowner said:
Speedo more than likely over reads anyway, mine all have, can always check it with sat nav, my disco 2 on all standard wheels and tyres over reads by 5mph at 70
Click to expand...

Speedo regulations used to be pretty simple. Plus or minus 10% at 30 MPH. That is why speed cameras allow for this. Regulations changed in 2001. Vehicles after that date can read less than actual speed, but actual speed CANNOT be greater than indicated. Unfortunately plod use the new regs and you see people being done by a speed gun operated by a part time jobsworth for 1 mph over 30 in a 30 zone. Ridiculous i know, specially on cars working to the older regs but it happens. If you don't know about regs you will get done when actually you can't be, but nobody is going to tell you that in court. With the bigger tyres on his actual speed when 60 mph is indicated will be a little over 65 mph. Just thought he would like to be aware of that.
 
]###########
DavidRRC said:
Hi, I recently bought a 1995MY RRC. (Vogue) It came with alloy wheels which are genuine Land Rover and marked 7Jx16x33 OAH2. They have BFG Mud Terrain 235x85R16. It also had a 2" lift (yellow Britpart kit) and 30mm wheel spacers. It looked too tricked up for me so .....
I have removed wheel spacers and fitted standard suspension to the front (rear will be done this weekend hopefully).
The tyres just catch the front wheel arch when going over bumps so I need to change something!

Questions.

What wheels and tyres would have been fitted as standard from new? Is a 7Jx16x33 OAH2 good for a standard RRC? Whats a good size of tyre (All Terrain)?

Thanks
David
Click to expand...
You'll want a tyre that is circa 29" tall to clear properly. Quite a few different sizes over the years.

205/80R16, 225/70, 225/75, 235/70 or maybe a 245/75 for slightly bigger. No real right or wrong unless you are wanting 100% factory fit.

As for tyres, there is lots of choice. Depends on your budget and how on road vs off road biased you want to go.
 
300bhp/ton said:
No they don't, please stop posting this. The RRC is built pre any regs you'll site and the speedo was never that accurate anyway...... plus nobody cares at all, not even the Police.
Click to expand...

Ask the people who have been done for 31 in a 30 zone in an old car and payed up because they didn't know the regs. It happens, so don't talk out of your arse.
 
Take your point but if I fitted bigger wheels the my speedo would be about right as is with most land rovers except maybe new ones.
The only car I ever owned that didn't read a lot fast at speed was a 1977 BMW 320 I once had and even then I couldn't really check it those days.
 
wammers said:
Speedo regulations used to be pretty simple. Plus or minus 10% at 30 MPH. That is why speed cameras allow for this. Regulations changed in 2001. Vehicles after that date can read less than actual speed, but actual speed CANNOT be greater than indicated. Unfortunately plod use the new regs and you see people being done by a speed gun operated by a part time jobsworth for 1 mph over 30 in a 30 zone. Ridiculous i know, specially on cars working to the older regs but it happens. If you don't know about regs you will get done when actually you can't be, but nobody is going to tell you that in court. With the bigger tyres on his actual speed when 60 mph is indicated will be a little over 65 mph. Just thought he would like to be aware of that.
Click to expand...
I hear what you are saying about being stopped. But that is just common sense.... it is a speed "limit" not a speed minimum. So you don't have to run right at the limit. And if you don't know how accurate your speedo is, check it. Every smart phone is capable of displaying a GPS speedo.

As for your claim of the speedo will show 65mph when traveling at 60mph. You assume there was no error, when more than likely it was probably 10% wrong to begin with. So the bigger tyres might make it show 59mph when actually doing 60mph.......

I'm driving about in a 53 plate Td4 Freelander on stock tyres at the moment. The speedo is constantly 5mph+ wrong, always reading high. You need to be over 75mph on the gauge to attain 70mph GPS. Therefore even if I gave a ****, I could easily up the tyre size quite significantly and only gain a more accurate speedo.
 
300bhp/ton said:
I hear what you are saying about being stopped. But that is just common sense.... it is a speed "limit" not a speed minimum. So you don't have to run right at the limit. And if you don't know how accurate your speedo is, check it. Every smart phone is capable of displaying a GPS speedo.

As for your claim of the speedo will show 65mph when traveling at 60mph. You assume there was no error, when more than likely it was probably 10% wrong to begin with. So the bigger tyres might make it show 59mph when actually doing 60mph.......

I'm driving about in a 53 plate Td4 Freelander on stock tyres at the moment. The speedo is constantly 5mph+ wrong, always reading high. You need to be over 75mph on the gauge to attain 70mph GPS. Therefore even if I gave a ****, I could easily up the tyre size quite significantly and only gain a more accurate speedo.
Click to expand...

On the standard tyres his speedo should read 60 mph at 60 mph within the plus or minus of 10% allowed on older speedos. With the larger tyres at an indicated 60 his actual speed will be 5 mph over and above indicated within the tolerance. You could not fit tyres that gave that differential on a post 2001 car it would be illegal. We all know older speedos were a bit fluffy but they aren't anymore. Not many jobsworths with speed guns know what the difference in regs is for older cars, if the drivers don't either they find it easy to work up their monthly bonus. For older cars, yes you can increase the tyre size providing it sits within the 10% window at 30 mph. For cars made 2001 and on you cannot. They immediately become illegal to drive on the roads.
 
wammers said:
On the standard tyres his speedo should read 60 mph at 60 mph within the plus or minus of 10% allowed on older speedos. With the larger tyres at an indicated 60 his actual speed will be 5 mph over and above indicated within the tolerance. You could not fit tyres that gave that differential on a post 2001 car it would be illegal. We all know older speedos were a bit fluffy but they aren't anymore. Not many jobsworths with speed guns know what the difference in regs is for older cars, if the drivers don't either they find it easy to work up their monthly bonus. For older cars, yes you can increase the tyre size providing it sits within the 10% window at 30 mph. For cars made 2001 and on you cannot. They immediately become illegal to drive on the roads.
Click to expand...
Modern speedo's are no more accurate at what they tell you. I have a 2017 plate Smart ForTwo. At 30mph it reads 2mph under on the digital display. Verified with GPS and road side speed readings.

This used to be true at motorway speeds too. however since it's last service where they perform a software update to the dash, it now reads over 3.5mph too fast at 70mph. i.e. you'll need to do 74mph on the speedo to actually be travelling at 70mph. And if you don't use the digial speedo read out, the stock speedo style simply is not precise enough to know what speed you are really doing. Broad needle and lack of speed markers on the dial. This also isn't uncommon.

maxresdefault.jpg


When driving, it is almost impossible to use the mechanical speedo for accuracy, the fat almost flat topped needle pointing at potentially a large white space.


Some Porsches are much worse, even when not driving. Trying to find 30 on the gauge is near impossible and certainly impractical.
maxresdefault.jpg
 
300bhp/ton said:
Modern speedo's are no more accurate at what they tell you. I have a 2017 plate Smart ForTwo. At 30mph it reads 2mph under on the digital display. Verified with GPS and road side speed readings.

This used to be true at motorway speeds too. however since it's last service where they perform a software update to the dash, it now reads over 3.5mph too fast at 70mph. i.e. you'll need to do 74mph on the speedo to actually be travelling at 70mph. And if you don't use the digial speedo read out, the stock speedo style simply is not precise enough to know what speed you are really doing. Broad needle and lack of speed markers on the dial. This also isn't uncommon.

maxresdefault.jpg


When driving, it is almost impossible to use the mechanical speedo for accuracy, the fat almost flat topped needle pointing at potentially a large white space.


Some Porsches are much worse, even when not driving. Trying to find 30 on the gauge is near impossible and certainly impractical.
maxresdefault.jpg
Click to expand...

The speedo is within the new specs then, what is your problem. As the tyres wear down it will come closer to true.
 
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