Thread: BFG km2 lt 255/85 r16 For 130

Thanks wortho

Will 7 x16 with 33 offset be ok

Originally Posted by Slunnie

Are they 285/85-16 or do you mean 255/85-16?

Sorry I put 85 instead of 75 they are 285x75x16- edited the post.

Originally Posted by juddy

Thanks wortho

Will 7 x16 with 33 offset be ok

They'll likely rub the radius arms and/or the rear spring towers at that offset.

My calcs suggest a Wolf offset rim (20.6mm positive) is the minimum required for no interference without tweaking suspension/steering stops.

I am out at Hail Creek, and all of the light vehicles have BFG KM2 tyres all round. In all honesty, I can't verify if they purchase them because they get a bulk purchase deal or anything like that.

But what I will say is that they take a stunning amount of punishment. The vehicles are used 24hrs a day, day in, day out on both graded roads and anything else that comes to your imagination in a mine site.

To me, this is a very good testing ground and they take a lot of punishment.

Originally Posted by Yorkshire_Jon

Oh yeah, finally you must run a 7-8.5" rim (8.5" is from memory). I know a 7" is defo the minimum. I run 16x7 and have never had a problem.

Hath
Jon

Sent using Forum Runner

Unless BFG have changed their tyre chart in the last twelve months, a 6.5" rim is the minimum legal fitment and has been forever.

Originally Posted by Wortho

With 255/85/16 tyres your gearing should be fine and your speedo should read accurate. 16x8 rims with a 0 offset will sit nice right on the edge of the flares and allow you a slightly better turning circle.

8" rim on a 255 ?

No way, miles too wide, you expose the sidewall far too much off road, try and stay near the minimum rim width for a 4WD tyre IMO.

Originally Posted by juddy

Thanks wortho

Will 7 x16 with 33 offset be ok

Originally Posted by n plus one

They'll likely rub the radius arms and/or the rear spring towers at that offset.

My calcs suggest a Wolf offset rim (20.6mm positive) is the minimum required for no interference without tweaking suspension/steering stops.

33mm offset rims would be plain bloody awful, nay impossible to live with.

We're talking a 130 right ?
Something that has the turning circle of a Manly ferry.
Stick 255/85's on the 6.5" HD rim and it suddenly has the turning circle of The Queen Mary.

IMO stick to either 20.6mm offset rims, or for a much better turning circle, 0 offset, but your balance needs to be absolutely spot on as torque steer is slightly increased from the increase in scrub radius.
Not noticeable for the most part with well balanced wheel/tyres, it is noticeable on loose surfaces when powering hard if the wheels are borderline out of dynamic balance.

I've gone from 6.5 HD rims to 0 offset 7" rims and I'm not going back, the increased manoeuvrability offsets any slight torque steer increase from my perspective.

My experience with cutting up a BFG is only when you have the tyre pressure wrong. I did a good 3000km on dirt during an inland trip last year. Some of the roads had rocks like cricket balls. It wasn't until perhaps the last 300km I got lazy and didn't go down in pressure. The tyres didn't chip just got cut up a fair bit. They have since done another 20K and are set to go back again this year. I guess I will see if they fail or sail.

I think for me you find 95% of people are happy with BFG, where as Coopers it's more 50/50. Maxxis also do a decent tyre in 255's which most people are happy with, but there your 3 choices.

The 255's on standard 6.5 rim fits inside the flairs, but rub on full lock on the radius arms. left hand down more so than right for some reason.
Juddy those Dakar rims are nice. I once had a notion of a set, but your only buying a look. No lighter or stronger than the trusty standard steel rim. Take the wife on a holiday, forget the rims. I'll show and tell you what I mean at the end f the week.