17” Alloys

[AnD3rew]

All a bit academic really isn’t it.
Overtaking something quickly on the highway to about 140k/hr before backing off to 110-120km/h or so is about all I’ll ever ask it to do.

Yep

 

[chriscroft]

All a bit academic really isn’t it.
Overtaking something quickly on the highway to about 140k/hr before backing off to 110-120km/h or so is about all I’ll ever ask it to do.

It's not even academic, it's just a bit of fun, a guessing game, a mind stimulator; as in most countries 99mph on the highway will get you into lots of trouble with the police; and 99mph off-road, well Paris-Dakar maybe, but I'd need a seat harness for that, and some clean underwear. I doubt personally I'll ever get past 80mph with all the speed cameras in the UK, and if I venture into France via Calais with their hi-tech kit and on-the-spot fines and vehicle/driving license confiscation(if you are really going for it) ...... that's asking for trouble.
I've heard in Aus they can even speed-zap you with Helicopters??, or is that an urban myth

 

[AnD3rew]

It's not even academic, it's just a bit of fun, a guessing game, a mind stimulator; as in most countries 99mph on the highway will get you into lots of trouble with the police; and 99mph off-road, well Paris-Dakar maybe, but I'd need a seat harness for that, and some clean underwear. I doubt personally I'll ever get past 80mph with all the speed cameras in the UK, and if I venture into France via Calais with their hi-tech kit and on-the-spot fines and vehicle/driving license confiscation(if you are really going for it) ...... that's asking for trouble.
I've heard in Aus they can even speed-zap you with Helicopters??, or is that an urban myth

In theory NSW at least had the ability to do airial speed enforcement and there are still signs on the Pacific highway saying that, but never actually heard of anybody getting a ticket that way, so may be a myth.

 

[globalgregors]

In theory NSW at least had the ability to do airial speed enforcement and there are still signs on the Pacific highway saying that, but never actually heard of anybody getting a ticket that way, so may be a myth.

I rather gather it comes and goes. They used to use light aircraft but I think that went out of vogue many years ago. More recently however…

 

[ECrider]

I rather gather it comes and goes. They used to use light aircraft but I think that went out of vogue many years ago. More recently however…

that chopper reminds me of Airwolf;

 

[bigleonski]

In theory NSW at least had the ability to do airial speed enforcement and there are still signs on the Pacific highway saying that, but never actually heard of anybody getting a ticket that way, so may be a myth.

They trialed it in northern NSW back in the ‘80s while I was living on the Gold Coast. They put markers on the highway to do the calcs somehow although I thought they used light aircraft not choppers.

I can remember riding to Tara in Qld (a few hours inland) and I was “speed testing” a Kawasaki ZX10 at the time - tucked under the faring and let’s say finding the redline which was substantial.
I had my visor slightly raised and imagined I saw a shadow over me, so instinctively lifted my head to look for the plane and the wind got under the visor and went snap. Nearly tore my head off and got close to a tankslapper which at that speed wouldn’t have been pretty.

 

[chriscroft]

I rather gather it comes and goes. They used to use light aircraft but I think that went out of vogue many years ago. More recently however…

That would take some escaping even at 99mph

 

[bemax]

It's not even academic, it's just a bit of fun, a guessing game, a mind stimulator; as in most countries 99mph on the highway will get you into lots of trouble with the police; and 99mph off-road, well Paris-Dakar maybe, but I'd need a seat harness for that, and some clean underwear. I doubt personally I'll ever get past 80mph with all the speed cameras in the UK, and if I venture into France via Calais with their hi-tech kit and on-the-spot fines and vehicle/driving license confiscation(if you are really going for it) ...... that's asking for trouble.
I've heard in Aus they can even speed-zap you with Helicopters??, or is that an urban myth

Come over to good old Germany as long as you can let it run here to its limit

 

[Nocrays]

I don’t know about other alloys but I damaged one of my defender alloys trying to change a tyre with tyre levers. After that I changed to heavy duty steel wheels for piece of mind.

I’ve got both alloys and steels for my defender. BFg ATs on the alloys as the daily drive and BFg Muddies on the steels for bush bashing and desert trips

 

[stickshifter]

The BFG are S rated in the UK 112mph, for that size; don't know if it's different across the world. There are plenty of MUD tyres that are Q rated at 99mph, but that wouldn't make any difference in many markets; as you can often fit specialist tyres with a lower speed rating than the vehicle, such as winter tyres; mud tyres etc.
Defenders(amongst others) with higher maximum speeds will happily run Q Mud tyres in many markets.
And again unbraked trailer size in Europe is always 750kg; although across the world this varies massively I guess, and of course, many markets have those electrical modules. The Grenadiers Gross Train weight is 7000kg's that's 3500kg vehicle + 3500kg towed (with brakes) which is pretty good by most standards I think,
State side the aftermarket people sell smaller brake kits to allow smaller than 20" wheel fittings to the more powerful Defenders, I believe.
Defender small brake kit takes the minium wheel size from 20" to 18" for a 400bhp defender.
So for now I'm sticking with my wheel size/Brake size theory (for now ) as a main driver for the 99mph speed limit; which I agree is plenty fast enough.

The speed rating of the BFG KO2 varies depending on which specific tire you buy. There are 30 different sized KO2 tires that fit on a 17-inch wheel; and there are 16 different sized KO2 tires that fit on an 18-inch wheel. See the table provided in this link:

BFGoodrich All-Terrain T/A KO2 Tires

BFGoodrich All-Terrain T/A KO2 tire specs. Find specs for BFGoodrich All-Terrain T/A KO2 tires in every size available on the market.

tiresize.com

Like you say, most of the KO2s that fit on either a 17 or an 18-inch wheel are S-rated for speed, but some are R-rated, and a couple are even T-rated. Here is the conversion table:

Speed Rating -- Max Speed in miles per hour
P — 93
Q — 100
R — 106
S — 112
T — 118

The max speed rating provides more information than just the maximum speed that the tire is rated for. A tire with a higher speed rating does a better job dissipating heat, and this translates to running cooler at lower speeds. So - all other things being equal - you want a tire with a higher speed rating - not because you want to drive up to that speed regularly, but because you want your tires to be more resilient to heat build-up and hence more reliable at all speeds, at all ambient temperatures. When carrying a heavier load or when towing, tires get hotter. A tire with a higher speed rating will dissipate heat better than a tire with a lower speed rating, even when cruising on the highway at 55 miles per hour.

The BFG KO2 has a speed rating that is equal to or higher than all other AT tires in its class. This is just one of the reasons that the KO2 is a good choice for the Grenadier. The KO2 is very capable off-road in most conditions, is 3-Peak Mountain Snow Flake rated (3PMSF), and is also very good on-road (really quiet given its blocky treads). The only drawback to the KO2 is mud performance; it is not a mud tire. But its just not possible for one tire to do everything well.

 

[chriscroft]

The speed rating of the BFG KO2 varies depending on which specific tire you buy. There are 30 different sized KO2 tires that fit on a 17-inch wheel; and there are 16 different sized KO2 tires that fit on an 18-inch wheel. See the table provided in this link:

BFGoodrich All-Terrain T/A KO2 Tires

BFGoodrich All-Terrain T/A KO2 tire specs. Find specs for BFGoodrich All-Terrain T/A KO2 tires in every size available on the market.

tiresize.com

Like you say, most of the KO2s that fit on either a 17 or an 18-inch wheel are S-rated for speed, but some are R-rated, and a couple are even T-rated. Here is the conversion table:

Speed Rating -- Max Speed in miles per hour
P — 93
Q — 100
R — 106
S — 112
T — 118

The max speed rating provides more information than just the maximum speed that the tire is rated for. A tire with a higher speed rating does a better job dissipating heat, and this translates to running cooler at lower speeds. So - all other things being equal - you want a tire with a higher speed rating - not because you want to drive up to that speed regularly, but because you want your tires to be more resilient to heat build-up and hence more reliable at all speeds, at all ambient temperatures. When carrying a heavier load or when towing, tires get hotter. A tire with a higher speed rating will dissipate heat better than a tire with a lower speed rating, even when cruising on the highway at 55 miles per hour.

Yep, but given the load rating is sky high on the BFG tyres compared to the load a Grenadier can impart on it,
and given that a Grenadier can't accelerate quickly or corner quickly
The speed rating is a lowly second imo compared to the load rating. It's the load rating that deals with heat build-up mainly in a Grenadier-type vehicle; different in a performance car I agree.
The most arduous situation I guess the Greadier will face regarding tyre degradation relating to heat build-up, is on arduous soft terrain, in blazing summer heat; with the side walls 1/2 buried in the sand; going uphills with a full load & lowered tyre pressures; then heat builds up quickly; but you will certainly not be doing anything near 99mph in that situation.

I haven't seen the axel maximum loads yet for the rear and front, but let's say the rear axel can carry 2500kg of the 3500kg available that's 1250kg per rear corner, and I would think that's over-egging it.

BFGoodrich A/T KO2 265/70 R17 121S -​

121 is a load rating of 1450kg so plenty of cover there.

 

[stickshifter]

Yep, but given the load rating is sky high on the BFG tyres compared to the load a Grenadier can impart on it,
and given that a Grenadier can't accelerate quickly or corner quickly
The speed rating is a lowly second imo compared to the load rating. It's the load rating that deals with heat build-up mainly in a Grenadier-type vehicle; different in a performance car I agree.
The most arduous situation I guess the Greadier will face regarding tyre degradation relating to heat build-up, is on arduous soft terrain, in blazing summer heat; with the side walls 1/2 buried in the sand; going uphills with a full load & lowered tyre pressures; then heat builds up quickly; but you will certainly not be doing anything near 99mph in that situation.

I haven't seen the axel maximum loads yet for the rear and front, but let's say the rear axel can carry 2500kg of the 3500kg available that's 1250kg per rear corner, and I would think that's over-egging it.

BFGoodrich A/T KO2 265/70 R17 121S -​

121 is a load rating of 1450kg so plenty of cover there.

For sure. We've had a bunch of conversations about Load Range and max load rating of the KO2s on the forum. Whether in D or E Load Range, the tires that are coming with the Grenadier are appropriate for its Gross Vehicle Weight Rating (GVWR). My point about Speed Rating is that many people seem to think it is only relevant with regard to max speed. So they look at the speed rating of a tire, and think "I'm not going to drive this car that fast, I can settle for X (hypothetical) speed rating" when in reality, if a tire meets other key specifications for your application (Load Range, Max Load Rating, Tread Pattern, etc.) you want to get the tire with the highest speed rating possible.

 

[caalm]

I can see these with 20" rolling around the 'up market' areas of my local Municipality.

That's what I'm going for but like a street spec but still capable off road....so still 18s but bit more flash than stock alloys.

 

[Tazzieman]

All a bit academic really isn’t it.
Overtaking something quickly on the highway to about 140k/hr before backing off to 110-120km/h or so is about all I’ll ever ask it to do.

Whilst towing your caravan?
Big balls!

 

[chriscroft]

Come over to good old Germany as long as you can let it run here to its limit

Thank you for the invite; I'm thinking about just that; a road trip from the UK (Hull-Rotterdam ferry)-Through Germany(taking in some sights)and Austria to Venice, in my shiny new Grenadier.
But before that I have another little trip planned which I will share on this forum first; a 1000mile in 24-hours; a "run-it-in" journey from where I live to north Scotland say high to the NC500 route, where Journalists got to play, and John o'Groats and back again. That will test the Recaro seats and my back.

 

[ECrider]

Thank you for the invite; I'm thinking about just that; a road trip from the UK (Hull-Rotterdam ferry)-Through Germany(taking in some sights)and Austria to Venice, in my shiny new Grenadier.
But before that I have another little trip planned which I will share on this forum first; a 1000mile in 24-hours; a "run-it-in" journey from where I live to north Scotland say high to the NC500 route, where Journalists got to play, and John o'Groats and back again. That will test the Recaro seats and my back.

that sounds like a good bedding in voyage. NC500

 

[chriscroft]

that sounds like a good bedding in voyage. NC500

Have you heard of the Iron Butt challenge for bikers?

IronButt-uk

A bit like this.

 

[bigleonski]

Whilst towing your caravan?
Big balls!

@Tazzieman
Don’t recall saying with a van??

To be honest I’ve probably done it once or twice towing this, but only if I can do it nice and steady and have a long long lead time.

100-110km/hr per speed limit generally suits me fine.





Nothing like a hot lap around the Bathurst race track in a 3tonne 4wd towing a campervan.

 

[ECrider]

Have you heard of the Iron Butt challenge for bikers?

IronButt-uk

A bit like this.

no I hadn't and thank you

 

[Tazzieman]

@Tazzieman
Don’t recall saying with a van??

I was just yanking your chain!
Yet I have been overtaken by nongs towing at speeds they probably shouldn't be travelling , assuming they aspire to making old bones...