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Pit Bull Growler AT/Extra 1.55 Tire Review


What you’re looking at are Pit Bull Tires’ 1.55 Growlers. That’s right, folks, 1.55 Pits! If you love the 1.9s and the 2.2s, well, add these to the list. With the Growler AT/Extra, Pit Bull has added another soft compound, sticky tire to its lineup of tires based directly on the full-size tires they make.

Pit Bull Growler 155


The Pit Bull Growlers, like the full-size version, are a directional tread design. This means they are intended to be mounted so that they rotate in a specific direction. It’s pretty easy to see how the individual lugs line up in chevron-like rows. Also, it’s not that directional tires don’t work in reverse, they are just designed or optimized to pull and grab better going forward. In loose dirt and in mud, a directional tire design pulls forward and flings debris out of the treads.

In comparison to other 1.55 tires, the Growler is among the taller tires, but is not the tallest tire offered in this class.

As you’d expect, these tires are specifically designed to fit a 1.55″ wheel. They measure 4.19″ tall, but the overall dimensions will vary depending on your wheel and foam choice. Speaking of foams, the Growlers come with a two-stage foam setup. Pit Bull states the softer outer foam has a density of 25 kg/m3 and is 43 mm thick. The inner foam has a 28% firmer density of 32 kg/m3 and is 28 mm thick.

Pit Bull’s parent company, Tire Mart, has been in business for over 60 years. The Pit Bull brand was launched in 1994.

pit bull growlers mounted 2

As described previously, the Growlers include a two-stage foam setup. As soon as I went to mount the tires with the stock foams on the RC4WD Stamped Steel 1.55 Stock White Beadlock (wagon wheels), I saw I was going to have a hard time squeezing everything together. I personally felt there was a little too much foam and decided the setup needed to be modified. The first thing I tried was removing the inner foam. This provided what was essentially a reverse air gap. Air gap refers when there is a space (an air gap) between the foam and tire. Removing the inner foam created a gap between the wheel and foam. With this setup, grip was good, but the tire’s sidewall easily folded over due to insufficient support.  The fix was to raid my parts bin for an appropriately sized memory foam.

I have tested the Growlers on two comp-ready rigs. One is an Axial SCX10 and the other is a RC4WD Trail Finder 2. I have tested at RC Excitement in Fitchburg, MA and RC Madness in Enfield, CT. Since installing the Growlers, I have tested  the tires on rocks, soft dirt and hard packed dirt. The traction is insane out of theses little tires. Ever obstacle, big or small, was scaled with no problems. I even put them through a real–alomost unfair–test and competed in 1.9 class. The Growlers were outstanding and enabled me to keep up when I should have been outmatched. I have, thus far, witnessed no noticable wear, which is nice for a soft tire. At RC Madness there is a large pile of broken asphalt. The Growlers did exceptionally well here.

I applaud Pit Bull for another great tire. These are great for those scalers going for the realistic look or the comp guys doing the 1.55 class.


Pit Bull Xtreme RC
Pit Bull Tires
Axial Racing
RC Excitement
RC Madness



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  1. Hi Matt, what kind of foam did you use in the end to replace the inner foams?

    I have problems with mine too (using wagon wheels also) and could use some tips from you

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