|
|
4x4 Clubhouse - BFGoodrich Mud-Terrain T/A KM
|
|
 BFGoodrich Mud-Terrain T/A KM By Chris
Shontz Trail Photography By Kristen
Rosen
|
 |
If it ain't broke... tweak
it!
BFGoodrich recently introduced its latest
revision to their Mud-Terrain T/A that has been a very
popular tire ever since it was introduced in 1980.
Cosmetically speaking, the changes made to the tire are
subtle, but the tire remains true to its own
heritage.
BFGoodrich delivers to us a not-so-radical mud
tire that seems adrift in a sea of extreme tires that
are sweeping the
market. | |
 |
According to BFGoodrich's Jeff Cummings, several
years and many different tread patterns, including
extreme ones, went into the development of the new M/T.
However, they kept coming back to the tried-and-true
original design and used it as the basis for the new KM
model. Will the updated design be a vast improvement?
Time will tell.
BFGoodrich continues to make use of its
traditional dog bone lug design, with the addition of
aggressive shoulder lugs, stylishly called
"DiggerLugz". The redesign also includes a rim
protector (as seen on the AT
KO), and a somewhat noticeable change to the lug
geometry.
KM stands for "Key-feature
Mud" | |
|
|
|
The
32x11.5R15 tires are installed on my Jeep TJ, which is
equipped with 2.75" of lift and stock 15x8 Jeep "Canyon"
wheels.
As
you can see in the surrounding pictures, the tires very
effectively contoured themselves to the terrain. As I
drove, I could hear the tires scuffing and scraping
against the jagged rocks. More than anything, I was
expecting to cut a sidewall or lose a bead, but
fortunately, neither occurred. |
|
 The new "rim protector" section
of the tire extends out past the rim's edge to help
prevent scraping from rocks.
|
|
 The new M/T KO tread pattern is
on the right. You can see that it has a larger, more
rectangular contact patch than the original
(left). |
 |
Here
you can see how the tires conformed to the
rocks.
The
treads were malleable enough to grab well and the
sidewalls folded over nicely. |
 |
 |
To
the left, you can see the light scuffing that was
caused.
In
the picture to the right, you can see where the sidewall
rolled over a rock. |
 | |
 |
At
the time of this photo shoot, I had had the tires
installed for nearly 4,000 miles. Within that time, I
had used them for two trail runs, one of which, was dirt
terrain with some mud and the other was mostly loose,
jagged shale rocks.
As
you can see, there is a noticeable cut in the picture to
the left next to the "G" in "BFGoodrich." This did not
happen during our test on the rock pile, but it happened
nonetheless. In my opinion, the scar is a bit premature
for only having been off-pavement twice, although, a
scar like this is generally not a problem,
structurally. | |
 |
You
can see the circular abrasions that were caused by
running across the rock pile during our photo shoot.
These are light scuffs, and they reveal that the
sidewalls are at least somewhat resistant to
damage.
The
"DiggerLugz" nicely deflected the rocks that they came
in contact with, and they also showed their use when I
accidentally clipped a curb at the local Ikea furniture
store. | |
 |
A
rock protrudes threateningly from the underside of the
vehicle.
In
retrospect, I could have used a spotter for this photo
shoot. |
 | |
|
Like
most similarly classed tires, I've found the BFGoodrich
Mud Terrain T/A KM to be a very malleable tire. It
contours to the terrain, but it really retains its shape
very well when it is under a lot of stress. You can see
the stress ripples in the adjacent photo.
On
the highway, I've found the Mud-Terrain KM's to be a
pleasure to ride on. They are both smooth and quiet. I
don't feel there is a noticeable difference on-pavement
between the old MT and the new MT KM's. |
 | |
|
The
limited driving I've done on wet roads with these new
tires revealed that they handled much better than my
prior set of tires, which were Super Swamper TSL
Radials. (32x10.5R15, SAM44R) The BFGoodrich MT KM's
seem much less prone to sliding.
The
KM features the same TriGard 3-ply sidewall that is used
on the BFGoodrich All-Terrain KO. Many similarly-classed
Light Truck tires only feature 2-ply sidewalls, but it
is good to keep in mind that sidewalls vary in strength
and overall thickness per manufacturer, so comparing 2
to 3 plies is not always comparing apples to
apples. |
 | |
 |
After 4,000 miles and two off-pavement
excursions, the wear and tear was readily
visible.
The
rubber that composes these tires seems
soft. |
 | |
 |
Tellico Bound
More
r ecently, I enjoyed the chance to run these tires down
in North Carolina's Upper Tellico ORV Recreation Area.
Tellico is a popular four-wheeling spot on the east
coast. The park is located near Murphy and rests on the
North Carolina / Tennessee border.
The
ten hour drive down Interstate 81 and the backroads over
the mountains were more than pleasant with these tires.
They were very quiet and very comfortable for myself and
my wife.
The
conditions in Tellico were dry so very little mud was
encountered. The group I was with, Jeeps-R-Us out of
central Pennsylvania, ran many of the popular Tellico
obstacles, such as Guardrail, Helicopter Pad, School
Bus, Slick Rock, and the Peckerwood Connector. The
tires, in addition to the suspension and Powertrax
lockers, performed exceptionally well on all of
these obstacles.
In
many situations, I could feel the tires sticking to the
terrain. One such instance was during my descent down
the Peckerwood Connector, after having climbed it. Many
drivers before me were prone to sliding into the hole
pictured below my Jeep, which would put them in a very
tipsy situation.
I
was not about to let gravity have its way with me.
During my descent, the tires seemed very cat-like in
their surefootedness, and they held my Jeep true to its
path. This allowed me to successful straddle the hole
and complete the descent without much
drama. | |
 |
The
tires also showed their off-pavement prowess coming up
Helicopter Pad. Not wanting to have anything to do with
the rock on the far right side of this picture (aptly
named "Rainbow Rock"), I picked a line further to the
right of the Jeep. It was a clean line, but a bit
steeper. The tires quickly found traction and the Jeep
walked up.
See the tires in
action: Check
out the MPEG video of the ascent up Helicopter
Pad.
In
Tellico, the dry performance of the BFGoodrich
Mud-Terrain T/A KM was very good. Tellico proved to be a
very useful testing ground for bringing out the true
colors of these champions of the
trail. | |
 |
In Conclusion
The
BFGoodrich Mud Terrain T/A KM tire has many great
qualities for the avid off-pavement hobbyist who needs a
tire that feels as much at home on the highway as it
does the rocks.
Strengths include great all-around traction and
quality, contained in a very malleable, yet surefooted
tire.
The
main weakness of this tire seems to be that it is very
prone to cosmetic damage, such as unsightly cuts and
abrasions. | |
 |
If
your vehicle is not a daily driver, and it is a
dedicated trail rig, you may be better off seeking out a
more durable and aggressively treaded alternative, but
the off-pavement adventurer with only one vehicle will
welcome the refined manners of the MT KM during the
daily commute.
By
retaining a traditional design, BFGoodrich reminds us
that change doesn't always have to be radical to be
good. The BFGoodrich Mud Terrain T/A KM provides
traction that does not disappoint and the tire is sure
to continue to be a popular choice in the off-pavement
tire market.
<Photo - 32x11.50r15 on 8" rims at 10 psi -
Very steep, rocky descent, that involved turning to
avoid trees. In that situation, it was no surprise that
the bead could not withstand the stress. The tire
re-mounted fine, with no
damage.> |
|
|
|
| |
|
|
|