diff --git a/runners/bench_defines.h b/runners/bench_defines.h
index cdebbc59..17c9a6b2 100644
--- a/runners/bench_defines.h
+++ b/runners/bench_defines.h
@@ -79,8 +79,12 @@
     BENCH_DEFINE(NOR_READ_SIZE,         1                                   )
     BENCH_DEFINE(NOR_PROG_SIZE,         1                                   )
     BENCH_DEFINE(NOR_ERASE_SIZE,        4096                                )
-    BENCH_DEFINE(NOR_READ_WIDTH,        1                                   )
-    BENCH_DEFINE(NOR_PROG_WIDTH,        LFS3_MIN(256, BLOCK_SIZE)           )
+    BENCH_DEFINE(NOR_READ_WIDTH,        (DISK_SIM == 0)
+                                            ? 1
+                                            : BLOCK_SIZE                    )
+    BENCH_DEFINE(NOR_PROG_WIDTH,        (DISK_SIM == 0)
+                                            ? LFS3_MIN(256, BLOCK_SIZE)
+                                            : BLOCK_SIZE                    )
     BENCH_DEFINE(NOR_ERASE_WIDTH,       BLOCK_SIZE                          )
     BENCH_DEFINE(NOR_READ_TIMING,       (DISK_SIM == 0) ? 0     : 0         )
     BENCH_DEFINE(NOR_PROG_TIMING,       (DISK_SIM == 0) ? 1563  : 0         )
@@ -113,8 +117,12 @@
     BENCH_DEFINE(NAND_READ_SIZE,        1                                   )
     BENCH_DEFINE(NAND_PROG_SIZE,        512                                 )
     BENCH_DEFINE(NAND_ERASE_SIZE,       131072                              )
-    BENCH_DEFINE(NAND_READ_WIDTH,       LFS3_MIN(2048, BLOCK_SIZE)          )
-    BENCH_DEFINE(NAND_PROG_WIDTH,       LFS3_MIN(2048, BLOCK_SIZE)          )
+    BENCH_DEFINE(NAND_READ_WIDTH,       (DISK_SIM == 0)
+                                            ? LFS3_MIN(2048, BLOCK_SIZE)
+                                            : BLOCK_SIZE                    )
+    BENCH_DEFINE(NAND_PROG_WIDTH,       (DISK_SIM == 0)
+                                            ? LFS3_MIN(2048, BLOCK_SIZE)
+                                            : BLOCK_SIZE                    )
     BENCH_DEFINE(NAND_ERASE_WIDTH,      BLOCK_SIZE                          )
     BENCH_DEFINE(NAND_READ_TIMING,      (DISK_SIM == 0) ? 12  : 0           )
     BENCH_DEFINE(NAND_PROG_TIMING,      (DISK_SIM == 0) ? 122 : 0           )