diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6052d9a..c03af27 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Changelog
 
+## v0.43.0 — 2026-09-21 15:57
+- **Wear rate reduced 10× per ISS-085** — `WEAR_PER_KM` in `lib/game/catalog.ts` drops from 0.005 to 0.0005, so plane maintenance status degrades 1/10th as fast (~13 mid-range hops → ~130 hops to break a full-health plane)
+
 ## v0.42.0 — 2026-09-21 15:02
 - **Auto-refuel on dispatch (ISS-082).** Manual refueling is gone — planes top up automatically at dispatch, so a grounded plane can always start any leg that fits a full tank when cash allows. `flyPlane` (`lib/game/actions.ts`) tops the tank to `min(maxFuel, max(fuel, 1.5 × required))` before departure — the same target/price terms as the removed forFlight mode: liters × FUEL_PRICE_PER_L minus the rep-scaled discount (v0.38.0), deducted from cash; unaffordable → 409 `insufficient funds` with nothing mutated, and a leg that doesn't fit even a full tank still 409s `insufficient fuel` (the backstop). The engine's auto-chain (`deliverPackages`, `lib/sim/engine.ts`) does the same at landing: when the next queued leg exceeds the landed fuel it tops up to the identical target when cash allows and chains anyway — only an unaffordable top-up grounds the plane with the queue kept intact
 - **REMOVED** `POST /api/planes/:planeId/refuel` (route + route tests), the `refuelPlane()` action + `RefuelOptions` (`lib/game/actions.ts`), the left-pane "Refuel to full" section and per-leg Refuel button with their dead state/derived values (`components/LeftPane.tsx`), and the OpenAPI `/api/planes/{planeId}/refuel` path + `RefuelRequest` schema — endpoint count 14 → 13, stale refuel mentions reworded in info/state/queue/repair descriptions, and fly's description + 409 now document the auto-refuel
diff --git a/lib/game/catalog.ts b/lib/game/catalog.ts
index dadc743..efc7bc1 100644
--- a/lib/game/catalog.ts
+++ b/lib/game/catalog.ts
@@ -125,8 +125,8 @@ export const MAX_FUEL_DISCOUNT = 0.2;
 
 // --- Maintenance (v0.39.0, ISS-069) ---
 
-// ponytail: balance-tunable — health lost per km of landed legs (~13 mid-range EDDF↔LEMD hops to break from full).
-export const WEAR_PER_KM = 0.005;
+// ponytail: balance-tunable — health lost per km of landed legs (~130 mid-range EDDF↔LEMD hops to break from full; 1/10× slower since v0.43.0, ISS-085).
+export const WEAR_PER_KM = 0.0005;
 
 // ponytail: balance-tunable — burn multiplier for a broken plane (health ≤ 0): it still flies, just thirsty.
 export const BROKEN_BURN_MULTIPLIER = 1.5;
diff --git a/lib/sim/engine.test.ts b/lib/sim/engine.test.ts
index ae81103..b985e66 100644
--- a/lib/sim/engine.test.ts
+++ b/lib/sim/engine.test.ts
@@ -407,7 +407,7 @@ describe('wear on landed legs + broken burn (v0.39.0, ISS-069)', () => {
     expect(await deliverPackages(inst, T0 + travelMs(km, PLANE_TYPES.atr72.speedKmh))).toBe(1);
 
     const plane = (await inst.db.select().from(schema.planes))[0];
-    expect(plane.health).toBeCloseTo(100 - WEAR_PER_KM * km, 9); // one mid-range hop ≈ −9.8 health
+    expect(plane.health).toBeCloseTo(100 - WEAR_PER_KM * km, 9); // one mid-range hop ≈ −0.98 health (v0.43.0, ISS-085)
   });
 
   it('clamps at 0 across multiple legs', async () => {
diff --git a/package.json b/package.json
index 49b4ac3..60517a4 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "flight-ops",
-  "version": "0.42.0",
+  "version": "0.43.0",
   "private": true,
   "scripts": {
     "dev": "next dev -p 3000",