diff --git a/include/ck_tile/core.hpp b/include/ck_tile/core.hpp
index f53a6b0fd6..3877b5ceed 100644
--- a/include/ck_tile/core.hpp
+++ b/include/ck_tile/core.hpp
@@ -15,10 +15,12 @@
 #include "ck_tile/core/container/map.hpp"
 #include "ck_tile/core/container/meta_data_buffer.hpp"
 #include "ck_tile/core/container/multi_index.hpp"
+#include "ck_tile/core/container/rbuffer.hpp"
 #include "ck_tile/core/container/sequence.hpp"
 #include "ck_tile/core/container/span.hpp"
 #include "ck_tile/core/container/statically_indexed_array.hpp"
 #include "ck_tile/core/container/tuple.hpp"
+#include "ck_tile/core/container/tuple_array.hpp"
 #include "ck_tile/core/numeric/arithmetic.hpp"
 #include "ck_tile/core/numeric/bfloat16.hpp"
 #include "ck_tile/core/numeric/float8.hpp"
diff --git a/include/ck_tile/core/config.hpp b/include/ck_tile/core/config.hpp
index a2362fb46b..cfb94ea2f3 100644
--- a/include/ck_tile/core/config.hpp
+++ b/include/ck_tile/core/config.hpp
@@ -51,6 +51,12 @@
 #define CK_TILE_STATICALLY_INDEXED_ARRAY_DEFAULT CK_TILE_STATICALLY_INDEXED_ARRAY_USE_TUPLE
 #endif
 
+#define CK_TILE_RBUFFER_USE_ARRAY 0
+#define CK_TILE_RBUFFER_USE_TUPLE 1
+#ifndef CK_TILE_RBUFFER_DEFAULT
+#define CK_TILE_RBUFFER_DEFAULT CK_TILE_RBUFFER_USE_TUPLE
+#endif
+
 #ifndef CK_TILE_USE_LAUNCH_BOUNDS
 #define CK_TILE_USE_LAUNCH_BOUNDS 1
 #endif
diff --git a/include/ck_tile/core/container/rbuffer.hpp b/include/ck_tile/core/container/rbuffer.hpp
new file mode 100644
index 0000000000..d44eacf2f7
--- /dev/null
+++ b/include/ck_tile/core/container/rbuffer.hpp
@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+#include "ck_tile/core/config.hpp"
+#include "ck_tile/core/container/array.hpp"
+#include "ck_tile/core/container/tuple_array.hpp"
+
+namespace ck_tile {
+
+#if CK_TILE_RBUFFER_DEFAULT == CK_TILE_RBUFFER_USE_TUPLE
+template <typename T, index_t N>
+using rbuffer = tuple_array<T, N>;
+#else
+template <typename T, index_t N>
+using rbuffer = array<T, N>
+#endif
+
+} // namespace ck_tile
diff --git a/include/ck_tile/core/container/statically_indexed_array.hpp b/include/ck_tile/core/container/statically_indexed_array.hpp
index 1542ad0768..4e1af96cbd 100644
--- a/include/ck_tile/core/container/statically_indexed_array.hpp
+++ b/include/ck_tile/core/container/statically_indexed_array.hpp
@@ -5,44 +5,15 @@
 
 #include "ck_tile/core/config.hpp"
 #include "ck_tile/core/container/array.hpp"
+#include "ck_tile/core/container/tuple_array.hpp"
 #include "ck_tile/core/numeric/integer.hpp"
 
 namespace ck_tile {
 
 #if CK_TILE_STATICALLY_INDEXED_ARRAY_DEFAULT == CK_TILE_STATICALLY_INDEXED_ARRAY_USE_TUPLE
-namespace detail {
-template <typename X, typename Y>
-struct tuple_concat;
-
-template <typename... Xs, typename... Ys>
-struct tuple_concat<tuple<Xs...>, tuple<Ys...>>
-{
-    using type = tuple<Xs..., Ys...>;
-};
 
 template <typename T, index_t N>
-struct statically_indexed_array_impl
-{
-    using type =
-        typename tuple_concat<typename statically_indexed_array_impl<T, N / 2>::type,
-                              typename statically_indexed_array_impl<T, N - N / 2>::type>::type;
-};
-
-template <typename T>
-struct statically_indexed_array_impl<T, 0>
-{
-    using type = tuple<>;
-};
-
-template <typename T>
-struct statically_indexed_array_impl<T, 1>
-{
-    using type = tuple<T>;
-};
-} // namespace detail
-
-template <typename T, index_t N>
-using statically_indexed_array = typename detail::statically_indexed_array_impl<T, N>::type;
+using statically_indexed_array = tuple_array<T, N>;
 
 #else
 
@@ -53,7 +24,7 @@ using statically_indexed_array = array<T, N>;
 #endif
 
 // consider always use ck_tile::array for this purpose
-
+#if 0
 template <typename X, typename... Xs>
 CK_TILE_HOST_DEVICE constexpr auto make_statically_indexed_array(const X& x, const Xs&... xs)
 {
@@ -66,5 +37,5 @@ CK_TILE_HOST_DEVICE constexpr auto make_statically_indexed_array()
 {
     return statically_indexed_array<X, 0>();
 }
-
+#endif
 } // namespace ck_tile
diff --git a/include/ck_tile/core/container/tuple_array.hpp b/include/ck_tile/core/container/tuple_array.hpp
new file mode 100644
index 0000000000..27fe9d8f5d
--- /dev/null
+++ b/include/ck_tile/core/container/tuple_array.hpp
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+#include "ck_tile/core/config.hpp"
+#include "ck_tile/core/container/array.hpp"
+#include "ck_tile/core/container/tuple.hpp"
+#include "ck_tile/core/numeric/integer.hpp"
+
+namespace ck_tile {
+
+namespace detail {
+template <typename T, index_t N>
+struct tuple_array_impl
+{
+    using type = typename tuple_concat<typename tuple_array_impl<T, N / 2>::type,
+                                       typename tuple_array_impl<T, N - N / 2>::type>::type;
+};
+
+template <typename T>
+struct tuple_array_impl<T, 0>
+{
+    using type = tuple<>;
+};
+
+template <typename T>
+struct tuple_array_impl<T, 1>
+{
+    using type = tuple<T>;
+};
+} // namespace detail
+
+template <typename T, index_t N>
+using tuple_array_base_t = typename detail::tuple_array_impl<T, N>::type;
+
+template <typename T_, index_t N_>
+struct tuple_array : tuple_array_base_t<T_, N_>
+{
+    using value_type           = T_;
+    static constexpr index_t N = N_;
+
+// clang-format off
+#define TA_COM_() static_assert(sizeof(value_type) * N % sizeof(Tx) == 0); constexpr int vx = sizeof(value_type) * N / sizeof(Tx)
+    template <typename Tx> CK_TILE_HOST_DEVICE constexpr decltype(auto) get_as()                            { TA_COM_(); return reinterpret_cast<tuple_array<Tx, vx>&>(*this); }
+    template <typename Tx> CK_TILE_HOST_DEVICE constexpr decltype(auto) get_as() const                      { TA_COM_(); return reinterpret_cast<const tuple_array<Tx, vx>&>(*this); }
+
+    // below index is for index *AFTER* type convert, not before
+    template <typename Tx> CK_TILE_HOST_DEVICE constexpr decltype(auto) get_as(index_t i)                   { TA_COM_(); return reinterpret_cast<tuple_array<Tx, vx>&>(*this).at(i); }
+    template <typename Tx> CK_TILE_HOST_DEVICE constexpr decltype(auto) get_as(index_t i) const             { TA_COM_(); return reinterpret_cast<const tuple_array<Tx, vx>&>(*this).at(i); }
+    template <typename Tx, index_t I> CK_TILE_HOST_DEVICE constexpr decltype(auto) get_as(number<I>)        { TA_COM_(); return reinterpret_cast<tuple_array<Tx, vx>&>(*this).at(number<I>{}); }
+    template <typename Tx, index_t I> CK_TILE_HOST_DEVICE constexpr decltype(auto) get_as(number<I>) const  { TA_COM_(); return reinterpret_cast<const tuple_array<Tx, vx>&>(*this).at(number<I>{}); }
+    
+    template <typename Tx> CK_TILE_HOST_DEVICE constexpr void set_as(index_t i, const Tx & x)               { TA_COM_(); reinterpret_cast<tuple_array<Tx, vx>&>(*this).at(i) = x; }
+    template <typename Tx, index_t I> CK_TILE_HOST_DEVICE constexpr void set_as(number<I>, const Tx & x)    { TA_COM_(); reinterpret_cast<tuple_array<Tx, vx>&>(*this).at(number<I>{}) = x; }
+#undef TA_COM_
+    // clang-format on
+};
+
+} // namespace ck_tile
diff --git a/include/ck_tile/core/tensor/static_distributed_tensor.hpp b/include/ck_tile/core/tensor/static_distributed_tensor.hpp
index 0c9e0debb1..38f6f21770 100644
--- a/include/ck_tile/core/tensor/static_distributed_tensor.hpp
+++ b/include/ck_tile/core/tensor/static_distributed_tensor.hpp
@@ -12,6 +12,7 @@
 #include "ck_tile/core/utility/functional.hpp"
 #include "ck_tile/core/utility/type_traits.hpp"
 #include "ck_tile/core/tensor/tile_distribution.hpp"
+#include "ck_tile/core/container/rbuffer.hpp"
 
 namespace ck_tile {
 
@@ -71,7 +72,7 @@ struct static_distributed_tensor
         constexpr auto sliced_thread_tensor_desc =
             make_naive_tensor_descriptor_packed(make_tuple(YSliceLengths...));
 
-        array<DataType, sliced_thread_tensor_desc.get_element_space_size()> sliced_thread_data;
+        rbuffer<DataType, sliced_thread_tensor_desc.get_element_space_size()> sliced_thread_data;
 
         static_ford<sequence<YSliceLengths...>>{}([&](auto idx) {
             constexpr auto idx_ys = idx + sequence<YSliceOrigins...>{};
@@ -87,7 +88,7 @@ struct static_distributed_tensor
     CK_TILE_HOST_DEVICE void
     set_y_sliced_thread_data(sequence<YSliceOrigins...>,
                              sequence<YSliceLengths...>,
-                             const array<DataType, NSlicedData>& sliced_thread_data)
+                             const rbuffer<DataType, NSlicedData>& sliced_thread_data)
     {
         static_assert(sizeof...(YSliceOrigins) == StaticTileDistribution::NDimY &&
                           sizeof...(YSliceLengths) == StaticTileDistribution::NDimY,
@@ -129,7 +130,7 @@ struct static_distributed_tensor
     }
 
     //
-    array<DataType, kThreadElementSpaceSize> thread_buf_;
+    rbuffer<DataType, kThreadElementSpaceSize> thread_buf_;
 };
 
 template <typename DataType, typename StaticTileDistribution>