Medium - Your classic wheel shape, versatile all-around wheel for street/park skating.
Surface
Smooth - Smooth wheels come with a shiny coating on the riding surface that feels grippy at first, but wears away quickly.
Key Features
Formula Four Urethane - Unmatched abrasion resistance for fewer flat spots. More controllable grip. Lasting speed no matter the terrain. Smooth anti-slick slide and a longer lasting size and shape.
Wheel Shape
Lock Ins Cut - Asymmetrically cut, you can get the benefits of conical outer walls while the inside wall is cut straight, giving you a flat surface to lock in your grinds.
Durometer
99a - Offers more grip than harder wheels and more slide than softer wheels. Great for slick surfaces when you want more control.
Specs
Size
53mm
57mm
Diameter (mm):
53.0
57.0
Width (mm):
32.5
37.2
Riding Surface (mm):
21.5
25.3
Suggested Riser Size (in):
N/A
1/8
Reviews
4.9
Overall Rating
Reviewed by
20
customers
Good Stuff, Very Spicy!
by Glance Dodger
in Berkeley, CA(Verified Buyer)
Posted on 5/26/2020
Spitfire Formula Four Lock-Ins Skateboard Wheels - natural (101d)
Lock-in is no lie. These puppies work. Click, bam, boom... locked. Super smooth. I recommend getting 1 mm size larger than you would normally ride, let the edges round out a little.
0person has found this review helpful
controlled slides, fast and smooth
by Chad Chaves
in south el monte, CA(Verified Buyer)
Posted on 5/22/2020
Spitfire Formula Four Lock-Ins Skateboard Wheels - natural (99d)
Nice shape, looks cool with graphic out,im stoked on the way the ride. Get some!!!
0person has found this review helpful
Lock-ins
by Nicholas Buono
in Castleton On Hudson, NY(Verified Buyer)
Posted on 4/20/2020
Spitfire Formula Four Lock-Ins Skateboard Wheels - natural (101d)
Best
0person has found this review helpful
Love these wheels
by m00se_bumps
Posted on 3/24/2020
Spitfire Formula Four Lock-Ins Skateboard Wheels
Great wheels, I picked up the 55mm 99A and have been really happy. Bigger size, wider contact patch, and slightly softer formula are great for less than perfect sidewalk and streets. would 100% recommend picking these up to anyone.
3people have found this review helpful
Keeping the underground lit
by Andrew K
in Marlton, NJ(Verified Buyer)
Posted on 8/11/2019
Spitfire Formula Four Lock-Ins Skateboard Wheels - natural (101d)
Went from bones SPF to these, I’m learning and landing tricks
2people have found this review helpful
Shipping
by Cesar Medina(Verified Buyer)
Posted on 8/6/2019
Spitfire Formula Four Lock-Ins Skateboard Wheels - natural (99d)
.
Learn more
