diff --git a/manager.cpp b/manager.cpp
index 712d7db..639ca2d 100644
--- a/manager.cpp
+++ b/manager.cpp
@@ -270,8 +270,23 @@
         return std::vector<uint8_t>();
     }
 
+    /* TODO: Currently, configure_ac isn't finding libuserlayer, w.r.t the
+     * symbols I need.
+     */
+
+    /** The channel to use for now.
+     * TODO: We will receive this information through the IPMI message call.
+     */
+    // const int ipmiChannel = ipmi::currentChNum;
+    /** This information is transport specific.
+     * TODO: We need a way to know this dynamically.
+     * on BT, 4 bytes of header, and 1 reply code.
+     */
+    // uint32_t maxTransportSize = ipmi::getChannelMaxTransferSize(ipmiChannel);
+
     /* Try reading from it. */
-    return info->handler->read(session, offset, requestedSize);
+    return info->handler->read(session, offset,
+                               std::min(maximumReadSize, requestedSize));
 }
 
 bool BlobManager::write(uint16_t session, uint32_t offset,
diff --git a/manager.hpp b/manager.hpp
index d7282e6..c0c4249 100644
--- a/manager.hpp
+++ b/manager.hpp
@@ -2,6 +2,7 @@
 
 #include <blobs-ipmid/blobs.hpp>
 #include <ctime>
+#include <host-ipmid/oemrouter.hpp>
 #include <memory>
 #include <string>
 #include <unordered_map>
@@ -10,6 +11,16 @@
 namespace blobs
 {
 
+/* The maximum read size.
+ * NOTE: Once this can be dynamically determined, we'll switch to that method.
+ * Having this in a header allows it to used cleanly for now.
+ */
+const int crcSize = sizeof(uint16_t);
+const int btReplyHdrLen = 5;
+const int btTransportLength = 64;
+const uint32_t maximumReadSize =
+    btTransportLength - (btReplyHdrLen + oem::groupMagicSize + crcSize);
+
 struct SessionInfo
 {
     SessionInfo() = default;
diff --git a/test/manager_read_unittest.cpp b/test/manager_read_unittest.cpp
index 1d40f5d..73e198b 100644
--- a/test/manager_read_unittest.cpp
+++ b/test/manager_read_unittest.cpp
@@ -60,7 +60,7 @@
 
     uint16_t sess = 1;
     uint32_t ofs = 0x54;
-    uint32_t requested = 0x100;
+    uint32_t requested = 0x10;
     uint16_t flags = OpenFlags::read;
     std::string path = "/asdf/asdf";
     std::vector<uint8_t> data = {0x12, 0x14, 0x15, 0x16};
@@ -75,4 +75,35 @@
     EXPECT_EQ(data.size(), result.size());
     EXPECT_EQ(result, data);
 }
+
+TEST(ManagerReadTest, ReadTooManyBytesTruncates)
+{
+    // For now, the hard-coded maximum transfer size is 64 bytes on read
+    // commands, due to a hard-coded buffer in ipmid among other future
+    // challenges.
+
+    BlobManager mgr;
+    std::unique_ptr<BlobMock> m1 = std::make_unique<BlobMock>();
+    auto m1ptr = m1.get();
+    EXPECT_TRUE(mgr.registerHandler(std::move(m1)));
+
+    uint16_t sess = 1;
+    uint32_t ofs = 0x54;
+    uint32_t requested = 0x100;
+    uint16_t flags = OpenFlags::read;
+    std::string path = "/asdf/asdf";
+    std::vector<uint8_t> data = {0x12, 0x14, 0x15, 0x16};
+
+    EXPECT_CALL(*m1ptr, canHandleBlob(path)).WillOnce(Return(true));
+    EXPECT_CALL(*m1ptr, open(_, flags, path)).WillOnce(Return(true));
+    EXPECT_TRUE(mgr.open(flags, path, &sess));
+
+    EXPECT_CALL(*m1ptr, read(sess, ofs, maximumReadSize))
+        .WillOnce(Return(data));
+
+    std::vector<uint8_t> result = mgr.read(sess, ofs, requested);
+    EXPECT_EQ(data.size(), result.size());
+    EXPECT_EQ(result, data);
+}
+
 } // namespace blobs