diff --git a/src/multi-body-problem-2D.cfg b/src/multi-body-problem-2D.cfg
index 4fc63ee9679dee491c37c99fd18ea8694f476fa1..9112827cdd0dcee0ccd8e19324e54dd778f4ffb5 100644
--- a/src/multi-body-problem-2D.cfg
+++ b/src/multi-body-problem-2D.cfg
@@ -1,6 +1,6 @@
 # -*- mode:conf -*-
 [boundary.friction]
-smallestDiameter = 0.01  # 2e-3 [m]
+smallestDiameter = 0.1  # 2e-3 [m]
 
 [timeSteps]
 refinementTolerance = 1e-5 # 1e-5
@@ -19,6 +19,3 @@ tolerance         = 1e-5
 
 [solver.tnnmg.linear]
 tolerance          = 1e-10
-
-[solver.tnnmg.linear.preconditioner]
-tolerance          = 1e-8