Slappy ST1 Inverted Light Ultra Low | 8.0

Slappy ST1 Inverted Light Ultra Low | 8.0

Slappy's most grind clearance, in an 8.0" street size.

The Slappy ST1 Inverted Hollow Light Ultra Low Kingpin 8.0" is the top of the Slappy range and its lightest truck, sold as a pair. It's for street skaters on 7.875" to 8.125" decks who grind everything: kerbs, ledges, hubbas and slappies.

On a standard truck the kingpin nut sticks up above the hanger, and that's what snags mid-grind. Here the ultra low hollow kingpin is inverted, threading into the baseplate so nothing pokes up. Slappy rates it at 12.5mm of grind clearance and a 25° slappy angle, double the clearance of the ST1 Classic. A hollow axle brings it down to 337g per truck, and it turns quickly with no break-in time.

Key Features

• Ultra low inverted hollow kingpin: nothing sticks up to catch on grinds
• 12.5mm grind clearance: the most in the ST1 range
• 25° slappy angle: lock into kerbs and ledges further
• Hollow axle: 337g per truck, Slappy's lightest truck
• Forged baseplate: with a shorter top bushing, per Slappy
• Quick turn, no break-in: dialled straight out of the box
• 8.0" axle: made for 7.875" to 8.125" decks
• Sold as a pair: two trucks, enough for one board

Specs

• Size: 8.0"
• Axle width: 8.0"
• Hanger width: 136mm
• Height: 53.9mm (Slappy standard height)
• Fits boards: 7.875"–8.125" (7.75"–8.25" works)
• Weight: 337g per truck
• Kingpin: Ultra low inverted, hollow
• Axle: Hollow
• Grind clearance: 12.5mm
• Slappy angle: 25°
• Sold as: Pair (2 trucks)

What Size Board Does It Fit?

Slappy names every ST1 by the deck width it fits, so an 8.5 truck goes on an 8.5" deck. Aim to be within about 1/8" either side; up to about 1/4" still works if you like your wheels a touch in or out from the edge.

The Ultra Low comes in 8.0" to 9.0".

About Slappy Trucks

Slappy Trucks is the work of Mike Sinclair, one of skateboarding's best known team managers, with years spent running teams for Tum Yeto brands Toy Machine and Foundation and for Nike SB. When the world locked down during the pandemic, Sinclair started pulling his trucks apart in his garage. In his words, it was either trucks or learn Japanese. Sampling ran for more than two years before he announced Slappy in late 2022, independent and run out of his garage.

Every ST1 is built around one idea: the best grind clearance possible without giving up a good turn. Slappy publishes its own grind clearance and slappy angle figures, and its inverted kingpin models push them furthest. Slappy also sells its parts one at a time, so a worn piece can be replaced without buying a whole new truck. Skaters pick Slappy for kerbs, ledges and slappies that lock in without the kingpin catching.

FAQs

What size board do the Slappy ST1 Inverted Hollow Light Ultra Low 8.0" trucks fit?
They fit decks from 7.875" to 8.125", with the best match on an 8.0" deck, and still work from 7.75" to 8.25". Slappy names its trucks by deck width. On an 8.25" to 8.5" deck, step up to the 8.25" size.

What is an inverted kingpin and why does it matter?
On a standard truck the kingpin nut and thread stick up above the hanger, which is what catches on kerbs and ledges. An inverted kingpin threads into the baseplate, so nothing protrudes. You get more clearance, fewer hang-ups and smoother grinds, especially on slappies, feebles and smiths.

What's the difference between this and the ST1 Classic?
Grind clearance and weight. The Ultra Low has 12.5mm of clearance and a 25° slappy angle against 6.3mm and 15° on the Classic, and weighs 337g per truck at 8.0" against 374g. If grinding is your priority, this is the pick.

Do I need risers with these trucks?
Usually not. Slappy lists 53.9mm for its standard-height trucks, which suits typical street wheels in the low to mid 50s without risers. If you run 56mm or bigger, or soft cruiser wheels, add a 1/8" riser and use 1/4" longer bolts.

Do Slappy trucks need breaking in?
No. They're responsive straight out of the box. Set the kingpin nut snug, then back it off a quarter turn at a time until the turn feels right.

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Grind more. Hang up less. Slappy everything.