24. Iron Treads

Ground / Steel · Quark Drive (100%) · VR A- · 2026-04 Usage 10.83% · base stats 90 / 112 / 120 / 72 / 70 / 106 · the format’s most reliable Rapid Spin + Stealth Rock lead — Electric-immune and bulky enough to do both jobs from one slot.

Format role

Iron Treads is the default offensive hazard package: it spins (98.9% Rapid Spin), it sets (89.0% Stealth Rock), and Ground/Steel + base 120 Def + a Ground typing’s immunity to Electric (so it eats Volt Switch and Thunder Wave) means it does that against the pivots — Zapdos, Landorus-Therian, Tapu Koko — that normally tax a spinner. Quark Drive (see § Booster Energy & Quark Drive) on the standard Jolly offensive spread boosts Speed (the +Spe nature pushes Speed past Attack), so Booster Energy turns Treads into a 513-Speed lead that jumps the 412 Zamazenta wall and every scarfless threat on turn one. On an aggressive Offense it is the cheapest way to keep your own Stealth Rock up while denying the opponent’s — the non-passive utility offense needs.

Treads keeps a fixed, predictable defensive typing teammates can build around. VR sits it A- (#14 usage) because its raw damage is mediocre and Gholdengo blocks its spin outright; usage stays high because nothing else does spin + rock + Electric-immunity in one slot.

Sets

The block splits hard: ~24.6% physical-Jolly lead, ~19.0% special-Timid Steel Beam, plus a defensive Careful cluster (~15% combined). Items: Leftovers 36.9% / Booster Energy 30.1% / Air Balloon 11.8% / Icium Z 8.3% / Assault Vest 4.0% / Focus Sash 3.3%.

Physical lead (offense default — 24.6% spread; Booster / Leftovers / Air Balloon)

• Item: Booster Energy (30.1%) or Leftovers (36.9%) · Ability: Quark Drive · Jolly
• EVs: 0 HP / 252 Atk / 0 Def / 0 SpA / 4 SpD / 252 Spe
• Rapid Spin (98.9%) / Stealth Rock (89.0%) / Earthquake (65.2%) / Ice Spinner (47.1%)
• Quark Drive note: on this spread Spe (342) > Atk (323), so Booster Energy boosts Speed (→513) — a turn-one tempo lead that clears the 412 Zama wall. Attack stays at 323.

Icium Z lead (8.3% item — the Ice-coverage lure)

• Item: Icium Z · Ability: Quark Drive (inactive — no Booster/terrain) · Jolly
• EVs: 0 HP / 252 Atk / 0 Def / 0 SpA / 4 SpD / 252 Spe
• Rapid Spin / Stealth Rock / Ice Spinner / Earthquake
• Subzero Slammer (Ice Spinner → 160 BP Z) one-shots the Ground/Flying and Dragon/Ground that wall its STABs — and breaks Multiscale Dragonite too. Costs your one Z-slot; the Z-item means Booster Energy is unavailable, so there is no item-triggered Quark Drive Speed boost (Speed stays 342, Atk 323 unless terrain support activates Quark Drive).

Special Steel Beam (19.0% spread; Booster / Assault Vest)

• Item: Booster Energy / Assault Vest (4.0%) · Ability: Quark Drive · Timid
• EVs: 0 HP / 0 Atk / 0 Def / 252 SpA / 4 SpD / 252 Spe
• Rapid Spin / Stealth Rock / Steel Beam (24.0%) / Earth Power (19.5%)
• On the Timid special spread Spe (342) > SpA (243), so Booster again boosts Speed, not SpA. Steel Beam still OHKOs the Fairies/Diancie that pivot on the physical set, but self-damages 50% — a one-use nuke in a hazard slot.

Defensive Careful (15%+ combined — 244/0/0/0/252/12 & 252/0/0/0/248/8)

• Item: Leftovers · Ability: Quark Drive · Careful
• EVs: 244 HP / 0 Atk / 0 Def / 0 SpA / 252 SpD / 12 Spe
• Rapid Spin / Stealth Rock / Earthquake / Knock Off (16.6%)
• A balance/BO build, not an Offense build — listed for recognition. Careful bulk + Knock Off turns it into a special-leaning glue spinner.

Minor block moves: Rock Tomb (10.0%, speed-drop utility), High Horsepower (7.9%, no-miss Ground STAB), Endeavor (7.3%, Focus Sash chip-and-spin lead tech).

What it does

The physical lead is the one Offense runs. With Booster Energy it gets Quark Drive Speed (513) the instant it switches in — a turn-one tempo lead that sets Rock or spins before Zamazenta and every scarfless threat moves (unboosted it sits at 342, under the 412 wall, so the Booster is what buys the window). Leftovers trades that tempo for longevity to spin across a game and survive Stealth Rock chip while still outspeeding Dragonite/Terapagos/neutral base-100s. Air Balloon flips the matchup against opposing Ground attackers and lets Treads pivot in on an Earthquake to spin.

Sequencing for offense: lead Treads, force the typical defensive answer, then either (a) set Rock and spin on the predicted switch, or (b) fish the Ice Spinner / Subzero Slammer read on a Flying-type pivot. The hard ceiling is Gholdengo: Good as Gold doesn’t stop Rapid Spin because Rapid Spin is a damaging move, but Gholdengo’s Ghost typing makes the spin fail to clear hazards if it’s in on you. Against a Gholdengo team you spin on the switch or not at all, leaning on Treads as a pure rock-setter + Ice/EQ chip. The special Steel Beam set exists precisely to punish the Fairy/Diancie pivots and nuke one switch-in, accepting that 50% recoil makes it single-use.

Load-bearing calcs

Level 100. Physical sets at neutral Atk 323 (Booster/QD goes to Speed, not Attack); Steel Beam set at 243 SpA (Booster goes to Speed there too). Targets are common offensive (0 HP) spreads unless noted.

Reads: the Icium Z lead is the real payload — even at neutral Attack, Subzero Slammer (a 160-BP Z-Move off Ice Spinner) OHKOs offensive Ground switch-ins that otherwise wall Treads’ STABs (Lando-T, Gliscor, Garchomp) and heavily punishes bulkier variants; it also rolls through offensive Multiscale Dragonite and reliably breaks the shield for a follow-up. Its raw STABs are mediocre into bulk (Ice Spinner is a 3HKO on Great Tusk, EQ a 2HKO on defensive Gholdengo), which is why the Z-lure overperforms its reputation. The Steel Beam set’s value is the two OHKOs on Iron Valiant and Diancie-Mega. The last row is why offense never leads Treads into an Ogerpon-Wellspring team: Ivy Cudgel cleanly OHKOs (108-128%) before Treads does anything back.

Checks & counters

Hard counters — the block’s top entries, all of which beat it cleanly and force a switch/KO:

• Ogerpon-Wellspring (73.1 — top check): Ivy Cudgel is 2x and cleanly OHKOs (108-128%); it can pivot into Treads’ STABs and Rapid Spin, but must still respect Ice Spinner / the Icium Z lure before evicting Treads from the spin role.
• Charizard-Mega-X / Charizard-Mega-Y (60.8 / 55.1): both resist Steel and threaten the OHKO back, but only Char-Y stays Flying and ignores Ground. Char-X becomes Fire/Dragon after Mega and is Ground-weak, so it invalidates Treads only when positioned before Mega or on a non-Ground click.
• Venusaur-Mega (58.5): Thick Fat softens nothing here, but it tanks EQ/Ice Spinner trivially and threatens with Grass STAB + Sludge Bomb.
• Great Tusk (55.9): the mirror — outbulks Treads, only 21% KOed (54% switch out), contests the same spin role, and tanks Ice Spinner (a 3HKO, ~33-40%) without folding.

Soft checks / revenge — Iron Valiant (53.2), Zamazenta (51.6), and Terapagos (51.3) all pressure or outpace it: Valiant out-speeds and OHKOs with a Fighting/Fairy STAB (but dies to the special Steel Beam set if it stays in), Zama threatens it but must respect a Booster-Speed lead (Treads at Quark Drive Speed 513 > Zama’s 412 on the switch-in turn), and healthy Terapagos can check both the physical set and Steel Beam through its raw bulk (Steel is neutral into Normal). The cleanest structural answer is Gholdengo — it isn’t in the block’s checks list because it denies the spin rather than KOing Treads, which is the more important loss for a spinner.

★ Offense angle

Treads is the utility slot you run when your Offense needs both hazards and hazard control without spending a passive turn, and Booster Energy makes the lead a genuine tempo piece (QD-Speed 513 jumps the 412 Zama wall to set Rock or spin first). The aggressive-Offense payload is the Icium Z lure: opponents treat Treads as a do-nothing spinner and pivot their Lando-T / Gliscor / Garchomp in on it — at which point Subzero Slammer can remove offensive Ground switch-ins or force heavy damage on bulkier ones, and it even cracks Multiscale Dragonite. That one-time punish opens the door for a partner like Iron Valiant or a Dragon-Dance sweeper to clean. Mind the slot cost: Icium Z is your one Z-Move, so it competes with a Z-wincon — run it only when your win path is “break the Ground wall, then sweep.” Otherwise default to Booster Energy (the speed-jump lead) or Leftovers (multi-spin longevity).

When Treads is on the other side, your offense breaks it trivially on the special end (any Water/Fire/Fighting/Ground STAB), but you must respect the turn-one Booster-Speed window (513 > 412 and faster than every scarfless mon): don’t lead a 412-or-slower setup mon into a Booster Treads expecting to move first. The cleanest counter-pick is your own Ogerpon-Wellspring or Great Tusk, both of which enter safely on the common STABs and either KO or contest the spin. And remember Treads can’t beat your Gholdengo: keep Ghost-typing in the back and Treads can never actually clear your hazards.

Top teammates & cores

From the anchor’s top teammates: Gholdengo 20.4%, Landorus-Therian 18.6%, Raging Bolt 15.5%, Alomomola 14.5%, Zamazenta 13.5% (other pairings below need re-sourcing against the 2026-04 spine).

• Treads + Iron Valiant — the canonical hazard-lead + revenge-breaker Offense core. Treads sets Rock and removes the opponent’s hazards/Grounds; Valiant cleans behind chip with its Booster SD or Specs mixed sets. They share almost no checks, and Treads’ Steel Beam set covers Fairy pivots that slow Valiant.
• Treads + Dragonite (22.7%) / Kingambit (14.8%) — Treads supplies the hazard chip these priority breakers convert into KOs: Stealth Rock + spin support turns Dragonite’s Extreme Speed and Kingambit’s Sucker Punch into reliable picks, and Treads’ Subzero Slammer can pre-clear a Ground (Lando-T / Gliscor) that would otherwise wall the Dragon/Dark cleaner.

The recurring shape is hazard control + a priority/revenge breaker — see 05-common-cores.md for the full hazard-lead-into-breaker pattern and 06-building-offense.md for slotting Treads as the offense hazard package.