This is a pair of Pitbull 1.9" Rock Beast XL Crawler Tires. The Rock Beast XL is similar to the original Rock Beast but now sports a larger size for guys wanting tall 1.9 tires. The extra size from the XL's put them at the max 4.75" diameter; the originals on the other hand stand at 4.45".  

Pit Bull Multi-Varied Tread Design
Pit Bull multi-varied tread design increases forward/reverse and lateral traction with serious biting across the footprint. These Rock Beasts have many features designed to increase speed and control while enhancing stability and contact patch. Excellent lateral bite--incredible stickiness and exceptional traction.

Alien Kompound
Alien Kompound is a super sticky rubber compound, and as they say at Pit Bull, they're "Stickier than Alien Snot!" Alien Kompound is great for wet or dry and provide great holding power even in off-camber terrain.

Features

• ALIEN Kompound is the only compound Pit Bull is using on these tires. They seem to get better and better as they break in... and you can use them for your daily hobby time as well as competition.
  
• Stepped lugs aid in lateral traction
• Multi-varied tread blocks create an alternating biting pattern for maximum traction, especially in off-camber situations
• Inside ribbing provides sidewall support and stability
• Integrated Sidewall Protector bands of rubber that add support and control
• Over-the-shoulder lugs wrap down the sidewall and add extra strength & traction to the shoulder & sidewall areas
• 4.75 inch Mounted Diameter *Dimensions may vary depending on mounted rim used.
• Tires come 2 to a package and include a decal sheet
  
• Two standard foams included designed to accentuate the performance of 1.9 Rock Beast XL Scale tires. Foams should be usable with other tire brands as well.

Specifications:
Width: 1.7-1.9"
Diameter: 4.75"
*Dimensions may vary depending on mounting rim used

***FOAM COLOR MAY DIFFER FROM THAT SHOWN IN PICTURES***