diff --git a/lib/outside-in-partial-rip-tiny-hypergraph-solver.ts b/lib/outside-in-partial-rip-tiny-hypergraph-solver.ts
index 6582ef3..40e8fc9 100644
--- a/lib/outside-in-partial-rip-tiny-hypergraph-solver.ts
+++ b/lib/outside-in-partial-rip-tiny-hypergraph-solver.ts
@@ -1040,8 +1040,14 @@ export class OutsideInPartialRipTinyHyperGraphSolver extends DistanceAwareTinyHy
       this.RIP_THRESHOLD_RAMP_ATTEMPTS,
       this.PARTIAL_RIP_MAX_ATTEMPTS,
     )
+    const ripThresholdRampAttempts = Math.max(
+      0,
+      this.RIP_THRESHOLD_RAMP_ATTEMPTS,
+    )
     const ripThresholdProgress =
-      maxRipAttempts <= 0 ? 1 : Math.min(1, state.ripCount / maxRipAttempts)
+      ripThresholdRampAttempts <= 0
+        ? 1
+        : Math.min(1, state.ripCount / ripThresholdRampAttempts)
     const currentRipThreshold =
       this.RIP_THRESHOLD_START +
       (this.RIP_THRESHOLD_END - this.RIP_THRESHOLD_START) * ripThresholdProgress
diff --git a/tests/outside-in-partial-rip-tiny-hypergraph-solver.test.ts b/tests/outside-in-partial-rip-tiny-hypergraph-solver.test.ts
index dcb2a05..8d1b2b5 100644
--- a/tests/outside-in-partial-rip-tiny-hypergraph-solver.test.ts
+++ b/tests/outside-in-partial-rip-tiny-hypergraph-solver.test.ts
@@ -171,6 +171,22 @@ test("the configured warmup performs a whole-graph rerip first", () => {
   expect(solver.stats.partialRipCount ?? 0).toBe(0)
 })
 
+test("the partial-rip cap does not compress the threshold ramp", () => {
+  const solver = createLinearSolver(24, {
+    RIP_THRESHOLD_START: 0.05,
+    RIP_THRESHOLD_END: 0.8,
+    RIP_THRESHOLD_RAMP_ATTEMPTS: 10,
+    PARTIAL_RIP_MAX_ATTEMPTS: 1,
+  })
+  solver.state.ripCount = 1
+  solver.state.regionIntersectionCaches[3]!.existingRegionCost = 1
+
+  solver.onAllRoutesRouted()
+
+  expect(solver.solved).toBe(true)
+  expect(solver.stats.currentRipThreshold).toBeCloseTo(0.125)
+})
+
 test("complexity-aware selection activates only at its route-count gate", () => {
   const belowGateSolver = createLinearSolver(24, {
     PARTIAL_RIP_MAX_ATTEMPTS: 0,