BFG AT's (1 Viewer)

[boydmick]

[quote author=Beowulf link=board=2;threadid=15809;start=msg156182#msg156182 date=1084463676]

If you're bottoming out your springs at 60+ MPH then you need stiffer springs or you need to slow down. Maybe you can install & lower front axle bump stops (from a '93) until you get resprung.

-B-
[/quote]

I immediately slowed to a speed where contact was eliminated. OME is already on the list.

However; the point of the post was that 285/75 16 BFG AT/KO's do not fit on a stock vehicle without rubbing despite all of the posts here saying they do! Again, it was very minimal contact, under specific conditions - but rub it did!

 

[Beowulf]

>> ... despite all of the posts here saying they do [fit]! <<

Not trying to quibble here, but the 285/75R16's do fit, and they do not rub in the 99.9% of the cases where rubbing is expected. Those cases are slow speed rock crawling, ditch traversal, and other situations where a tyre is completely stuffed into the wheel well and the steering is at full lock.

If you hit something at 60+ MPH that is big enough and solid enough to bottom out the stock springs and the shocks then you're probably risking significant suspension damage and tyre damage.

I will bet you a case of Bloodington's that your stock sized tyres would "rub" in the same scenario.

-B-

 

[Rich]

An interesting consideration is that at speed the tire diameter is larger than when going slow, so it requires less suspension travel to get contact at speed than it does when going slow.

 

[ginericLC]

[quote author=thorvald link=board=2;threadid=15809;start=msg150812#msg150812 date=1083735458]
if you might be running into any kind of mud, get a mt tire. BFG A/T's SUCK in mud.
went through some yesterday with my truxxus mt's that had them clogged up, wouldnt have made it in or out with the at's. same for running snow, the at's will clog up, and not unclog till you hit solid track or pavement.
[/quote]

But chains go on them a lot easier than MTs. And chains rule in the snow!! Also I agree that they aren't good in mud. But it depends on the type of mud. Around here we can get away with them in most of our mud. No clay.

 

[landtank]

As far as the high speed rub. I'm not overly crazy for the "bump stops" that are in the springs. They seem to be more of a cushion than an actual stop. I found that FJ60/62 front stops bolt right in to the FJ80 frames. However there needs to be a shim on the left side as the axle housing is a smaller diameter. I haven't gotten to work that out but i have it from a good source that it's 1". Anyway, I'm more comfortable with a traditional stop to limit travel than what's currently in there.

 

[boydmick]

[quote author=sadflatlander link=board=2;threadid=15809;start=msg150602#msg150602 date=1083717663]
*no* rub at all??

[/quote]

Since this was the original concern, I felt obliged to share my experience.
I agree that the tires fit, but even if they rub one time in 10,000, they do rub.

[quote author=Beowulf link=board=2;threadid=15809;start=msg157318#msg157318 date=1084574832]

If you hit something at 60+ MPH that is big enough and solid enough to bottom out the stock springs and the shocks then you're probably risking significant suspension damage and tyre damage.

I will bet you a case of Bloodington's that your stock sized tyres would "rub" in the same scenario.

-B-
[/quote]

I'll take that bet!
I never said I bottomed the stock springs, nor did I say I hit anything. I was merely travelling on a graded, hard packed, dry lake bed at a comfortable rate of speed. There were some slight, gradual variations in the height of the road bed (2 inches maximum), when much to my surprise; the tires rubbed.

I'll take some photos and measurements. . . start chilling that case!

 

[Beowulf]

>> start chilling that case! <<

It's in the fridge, waiting on pics and proof though.

-B-

 

[GXO]

Not to add any value to this discussion at all...

can I have a beer?

 

[MoJ]

[quote author=boydmick link=board=2;threadid=15809;start=msg157766#msg157766 date=1084663392]
gradual variations in the height of the road bed (2 inches maximum), when much to my surprise; the tires rubbed.
[/quote]

Boydmick, not doubting your observation, just more surprised than anything. I've been beating on wider bfg a/t 305's for about 3k miles now and have yet to get them to rub, let alone at speed over a 2 inch variation in the surface which I encounter on a regular basis traveling unpaved country roads. ???

Just out of curiosity, what's the story behind needing a HG on your rig with such low miles? (your sig says new HG)

Thanks,
Jason

 

[boydmick]

It happened abuot 2000 miles after I bought it. As far as I can tell, the PO probably overheated a couple of times. There was no weeping from the block. The coolant was red (but may have been mixed in the past). There was a slight bit of sludge in the overflow bottle. Compression tested fine.

Started running rough and check engine light flickered, then became steady. :whoops:


[quote author=Beowulf link=board=2;threadid=15809;start=msg159699#msg159699 date=1084944417]

It's in the fridge, waiting on pics and proof though.

-B-
[/quote]

I'm waiting to get my camera back from a friend, pictures to follow soon!

 

[cruiserdan]

I finally got one of my 305's to rub. It took the Golden Crack to do it. RR tire fully stuffed into the well and the LR tire dangling in the air. The RR tire barely contacted the inside of the inner wheel well. I did not hear or feel it over the lovely sound my Slee rear bumper made as I drug it off the back side of the crack. There was a very faint circular mark just barely contacting the rubberized coating inside the wheel well.