Written by; Greg Jacobs
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Pit Bull
6ply 25.5" Growlers
Here is the second set of Pit Bull Tires for us to test.
This time I choose the 25.5x8x12 front, and
25.5x10x12 rear. These are the 6ply Growlers, and
not the 8ply UBER Growlers. I choose these lighter
and less aggressive tires to run on the Renegade. I
have been trying to find a great GNCC, fast pace
racing tire. Up until now I have been using the ITP
Holeshots for racing around, and they are a very
good choice, but they are only 4ply, not very
durable, and they wear very fast. I do like the
Holeshots, but they are falling short. In the pursuit of
always finding the perfect setup, I am trying to find
that perfect setup for the sport quads, like I did with
the Utility Quads with the Pit Bull Rockers.
One of the most important features I
look for in a sport tire is size, weight,
and traction. When it comes to
performance keep in mind weight of a
tire is not as critical to me when we are
talking about drag racing in 300' vs
GNCC racing/face pace aggressive trail
riding. When drag racing you want the
lightest possible tire to provide the
minimum amount of power loss.
However, GNCC racing/fast pace
aggressive trail riding you can get away
with a slightly heavier tire, since a lot of
racing is short burst of power, off the
throttle, and then back on the throttle,
in a tight wooded area. So, traction and
hook up is more important than weight
for this type of riding. Plus, having a
strong and durable tire that will take a
pounding. Unlike drag racing in 300'
where there are no obstacles to destroy
a tire, racing in the woods can be
hazardous to a tire.
Lets, first take a look at the weight of the 25.5", 6ply Growlers.
Rear Tire weighs 44.5lbs
Mounted on 12" Aluminum Beadlock Wheels
Front Tire weighs 38.5lbs
Mounted on 12" Aluminum Beadlock Wheels
According to Mike the owner of Pit Bull Tires, a 25.5" Front Growler weighs 25.2lbs, while the rear tires weigh 31.5lbs
"WITHOUT BEING MOUNTED ON WHEELS, JUST BY THEMSELVES"
ITP Holeshot Rear Tire weighs 26.5lbs
Tires un-mounted
ITP Holeshots Front Tire weighs 18lbs
Tires un-mounted
Rear Tire weighs 35.5lbs
Mounted on 12" Aluminum Wheels
Front Tire weighs 30.5lbs
Mounted on 12" Aluminum Wheels
As we can see ITP Holeshots "un-mounted" weigh 26.5lbs rear, 18lbs front, and "mounted" 30.5lbs front, 35.5lbs rear.
Lets re-cap on the tire weights between Holeshots, and Growlers

Tire weights "Dis-Mounted"
Holeshots 25" Front 18lbs, Rear 26.5lbs
Growlers 25.5" Front 25.2lbs, Rear 31.5lbs

Tire weights "Mounted"
Holeshots 25" Front 30.5lbs, Rear 35.5lbs
Growlers 25.5" Front 38.5lbs, Rear 44.5lbs
The Holeshots weigh roughly 6 to 7lbs more per tire than the Growlers, which is quite a bit. Bear in mind, you are
getting twice the tire with the Growlers, you are getting a 6ply tire vs 4ply, you are getting twice the rubber, more
durability, and longer wear. Basically, overall you are getting twice the tire with the Growlers. Having said that, if I
were drag racing in 300', hands down I would choose the ITP Holeshots, simply because of their lightweight, and
fairly good hook up. Now when it comes to GNCC style racing or fast pace aggressive trail riding in woods, off
camber, rocks, logs, mud, etc... hands down I would choose the Growlers, "just based on the Specs". I emphasize
"just based on the Specs", because we all know what is on paper, sometimes does not translate to the Real World
Riding. Stay tune for the Real World Update Shortly.
Here are a few things I am looking forward to, and expecting to happen.

1) I don't expect any body/tire roll with the Growlers since they are stiffer than the Holeshots. Which will be good, I
don't like when the tire's sidewall flexes when going hard in to corners. I don't want body roll from the quad or tires.
2) I am expecting the Growlers to be much stronger and more durable than the Holeshots. I don't expect this to be a
problem since the Growlers are 6ply, and plus they have the Pit Bull built in toughness proven technology. Now, I
could of gone with the 8ply Growlers which would be even stronger and more durable, but I still want the tire to flex a
little bit and be soft, so the 6ply will be a good compromise.
3) I expect the traction with the Growlers will be 100% better than the Holeshots. If
the Growlers are anything like their brother Rockers traction will not be an issue.
4) Given how the Growlers are heavier than the Holeshots, I will be focusing on how
much power loss, and handling I "may" lose with the heavier and more aggressive tire.
Stay tune for the Real World Test, in about 2 weeks, I ll have these tires in action. I
did get a chance to ride them in the snow, and they have worked great, no problems.
You will notice with the Growlers unlike the Rockers have a
directional pattern. This means the tire will track better when
changing direction, and will pull better in the mud.

On the XOR 6ply growlers the tread depth is slightly less than in the
front than the rear. The front has a 1" depth, while the rear has a
1 1/8" lug depth.  You will also notice the lugs have different shape
and size lugs which help in the overall traction, and self cleaning.

In addition the top of the lugs have little sipes/grooves to help in the
traction, and cleaning.
Just like the 25.5"
Rockers, the 25.5"
measure 26" in size.

Keep this in mind
when ordering the
tires since all their
tires measure .5"
larger.