OKA 4WD . com

Hi All,

Whats peoples thoughts on these

http://www.ebay.com.au/itm/4-X-NEW-315-75-16-BF-GOODRICH-ALL-TERRAIN-T-A-TYRES-BFG-/360472907033?pt=AU_Car_Parts_Accessories&hash=item53eddc0d19

Fitted onto Eagle Alloy 10 inch

I think they would be close  to orginal size.

These tyres have a load rating of 121. that converts to 1450kg per wheel. this is a  fair bit less than the 3400kg rating on the Oka rear axle. 

Their capability would be reduced further when they are underinflated in off road conditions. I guess it depends where you are driving, how heavy you are and whether you plan to take the risk.

I would suggest that these tyres are a bit underdone. You would need a load index of  126 to just scrape in to the rear axle rating. 

The Eagle alloys don't quite make the grade either.

Ok cheers. I thought the Eagle Alloys did fit the bill.

I didnt think they was under rated as they are a popular choice

Eagle Alloys 16" x 10", 058 pattern are rated at 3420lb per wheel which converts to 1550kg, or 3100kg per axle.

Sorry Guys, I have made an error. The rear axle is rated at 3100kg, not 3400kg, so the Eagle alloys are OK just but the tyres are still abit underdone.

16" tyres in "normal" 4wd types are available to suit the Oka, most manufacturers have tyres with high enough load ratings, there are some gaps in the larger sizes but they are available, just have to ask most of the manufacturers as they don't list them on their websites or brochures.

I've been running the Eagle 16x8 with the same size tyre in Hankook AT-M  for the last 18 months, only one stake right on the shoulder in the first 5k which was plugged on the spot and has held since. 374 weighs around 5500kg fully loaded, is balanced pretty much equally front to rear (within 100kg) so yes they are right on the max load carrying capacity but having survived the last 35,000km, the recent Simpson trip where they did about 1000km at less than 25 psi I can't complain as they've proved to be pretty tough and well wearing.

Mickey thompson and Toyo both have a 315/16 AT or MT in a higher rating but have to be ordered. 285 in a higher rating are freely available from several brands.

My main reasoning for using 16" rims and tyres in relatively common sizes was the ability to obtain an emergency spare pretty much anywhere in remote areas.

I was going to fit  315 /75 r 16 good year wrangler dura max  to ours but didnt as they were hard to get at the time ,they had a 127 rating from memory which would suit okas , i went for bfg 315 /75 r16 on eagle alloys 058pattern  cheers peter

Hi Peter, are your tyres the same as the ebay link?

The ones in the ebay link are only 121 load rating so not high enough for the Oka, most manufacturers make the same tyre with different load ratings, some only import the lighter ratings so best to ask the manufacturer what is sold locally.

I got mine from the states and they do have a rating of 121 but in saying that i know you are all going to say they are not suited for the oka ,that i would argue as it also is how you set your oka up, i am not going the hole hog on ours  16mm chip board cuboards with a 30mm top seems crazy to me, to put all that weight in it for no reason , so ive made ours out of 10 mm ply ,with 12mm top  and it is twice as strong as chip board  so i will not be as heavy , a lot less me think  !

Peter you may be in for a shock when you weigh the finished vehicle, I made mostof our fitout with Qubelock , the 25mm aluminium square tube with plastic fittings and then used Elfa baskets so you would think bugger all weight. All loaded and fitted out it weighs just on 5.5 tonne.

Yep, I did the arithmetic and calculated the final weight to the nearest gram and given that I had gotten rid of the heavy tray and heavy crew cab and heavy camper box it should have been at least half a tonne lighter. Plastic drawers and 6mm ply doesn't mean a thing when you load up with 300L water and 300L diesel and all the goodies. At least unlike some very high-priced fancy overlanders that you can supposedly drive on a car licence - provided the vehicle is just about empty - we can be legal in full expedition mode.

It wasn't a bit lighter and just goes to show that it is true that extra junk takes up every last kg of allowable gross.

As I understand the law (not well), if the tyres MUST be legal at the GVM, irrespective of the fact that the vehicle's actual weight might be a lot less than that.

A difference between being 'safe' and being 'legal'.

Nice to be both.

Peter you are correct, same applies to being overweight, exceeding the GVM is also illegal. Both give the insurance company an out if the occasion arose.

Just like people who have heavy vehicles "engineered" to downgrade the GVM to 4.5T so that it can then be driven on a car licence, then load it up past the 4.5T and continue to drive it on a car licence.