Slappy vs Thunder Trucks

The biggest measured difference is grind clearance. In the Slappy Fall 2026 catalog, the Slappy Classic has 6.3 mm of grind clearance against 3.8 mm for Thunder, and a Slappy angle of 15 degrees against 7. Slappy's inverted trucks go further: 9 mm on the Inverted Kingpin and 12.5 mm on the Ultra Low Inverted Hollow Light.

Grind clearance and Slappy angle

Truck Grind clearance (mm) Slappy angle (degrees)
Slappy Ultra Low Inverted Hollow Light 12.5 25
Slappy Inverted Kingpin 9 20
Slappy Classic 6.3 15
Thunder 3.8 7

Grind clearance is the number of millimeters from the kingpin to the top of the hanger. The Slappy angle is the angle the trucks give you before the kingpin catches on smiths, feebles, hurricanes, Bennett and Barley grinds, measured with an iPhone. Both are Slappy's own measurements, as listed in the Slappy Fall 2026 catalog. The larger the number, the less kingpin snag.

Slappy ST1 at a glance

  • Height: 53.9 mm for standard trucks, 50.0 mm for Lows (Hollow Low Profile and Ultra Low).
  • Sizes: named for the deck width they fit, from 7.5 to 13.0 on the size chart.
  • Weight per truck at 8.5: Classic 388 g, Hollow 368 g, Lows 357 g, Ultra Low Inverted Hollow Lights 351 g.
  • Kingpin options: standard (Classic), hollow (Hollow, Hollow Lights), inverted (Curb Killer II) and Ultra Low inverted.

What this page does not compare

Weight, height and price for Thunder trucks depend on the model and size, and we have not listed them here. Turn feel is personal - the reviews below show how skaters who rode both describe it.

Watch a rider switch

More rider reviews: Slappy trucks reviews.

Slappy vs Thunder FAQ

Do Slappy trucks have more grind clearance than Thunder?

In the Slappy Fall 2026 catalog measurements, yes. The Slappy Classic has 6.3 mm of grind clearance against 3.8 mm for Thunder, and the Slappy Ultra Low Inverted Hollow Light has 12.5 mm.

What is the Slappy angle?

The angle your trucks give you before the kingpin catches on smiths, feebles, hurricanes, Bennett and Barley grinds. The Slappy Fall 2026 catalog lists 15 degrees for the Slappy Classic and 7 degrees for Thunder.

How tall are Slappy trucks?

Standard ST1 trucks are 53.9 mm tall. Lows - the Hollow Low Profile and the Ultra Low - are 50.0 mm. See the Slappy truck size chart.