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Bones Kowalski SPF P5 Pro Skateboard Wheels

4 Reviews
bear (84b)
Color: bear (84b)
Size: Size Chart
Color: bear (84b)
In Stock - Qualifies For FREE U.S. Shipping
Kevin Kowalski doesn't haphazardly throw his name on anything, so you know there's a reason he's all about these amazing SPF skateboard wheels. It's about quality.
  • Set of 4 Wheels
Wheel Profile
  • Wide
  • Smooth
  • Skatepark Formula (SPF)
Wheel Shape
  • SPF P5 Shape
Pro Model
  • Kevin Kowalski
  • 84b SPF
Wheel Profile

You may notice a discrepancy between what we designate a wide, standard or narrow and what the brands do. This classification is our opinion based on years of skating, as well as looking at the profile of the wheel as it compares to what we believe is a standard profile. You just have to trust us on this.

Wide - Wide wheels provide more traction and stability at high speed, so you'll be less likely to slip out of your line.


Smooth - Smooth wheels have less surface friction than treaded wheels and are easier to slide.


Skatepark Formula (SPF) - Skatepark Formula wheels are made from a high quality urethane that was specifically formulated to resist flatspotting on slick or smooth surfaces while maintaining a higher rebound for a quicker response and a faster roll.

SPF wheels have a high resistance to abrasion without compromising hardness and slide ability. Skatepark Formula wheels grip better on slick surfaces and are almost impossible to flatspot.

Wheel Shape
SPF P5 Shape

84b SPF - SPF's are a hard skatepark formula wheel, designed for a fast roll whether charging the local park or your neighbor's pool. Bones claims that their "b" scale is 20 points lower than your typical “a” scale, meaning the hardness of the Bones 84b SPF Formula would in turn equal a 104a in hardness which would be beyond the limitations of the “a” scale.

Diameter (mm):54.056.0
Width (mm):31.032.0
Suggested Riser Size (in):N/A1/8
Overall Rating
Reviewed by 4 customers

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by Alex
Posted on 5/1/2017
Bones Kowalski SPF P5 Pro Skateboard Wheels
The speed and slide-ability of this wheel is incredible. Love these wheels
0 person has found this review helpful
SPF, still the best for concrete
by DB in Salt Lake City, UT (Verified Buyer)
Posted on 2/21/2017
Bones Kowalski SPF P5 Pro Skateboard Wheels - parks (84b)
Standard SPF speed, perfect for smooth or rough concrete. Even at the smaller size, works well, especially after breaking them in a bit. And you're supporting Kevin Kowalski, ripper!
0 person has found this review helpful
Fast and grippy in park
by Joseph Sutton in Tuscaloosa, AL (Verified Buyer)
Posted on 8/3/2016
Bones Kowalski SPF Pro Skateboard Wheels - parks (84b)
In a concrete park, these wheels were significantly faster than the Better Skateboarding wheels I was using, and have enough grip to really dig into carves, but not so much that they won't slide when you want them to. Great for smooth terrain, very rough and slow in the streets.
1 person has found this review helpful
Hands down best wheels for a skatepark
by Tim Corona in Bakersfield, CA (Verified Buyer)
Posted on 8/17/2015
Bones Kowalski SPF Pro Skateboard Wheels - parks (84b)
These wheels rip bones never disappoint would buy again times 10 !
4 people have found this review helpful

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