diff --git a/cub/cub/device/dispatch/tuning/tuning_radix_sort.cuh b/cub/cub/device/dispatch/tuning/tuning_radix_sort.cuh
index a45ef61d369..6977b9a5e2a 100644
--- a/cub/cub/device/dispatch/tuning/tuning_radix_sort.cuh
+++ b/cub/cub/device/dispatch/tuning/tuning_radix_sort.cuh
@@ -143,6 +143,140 @@ template <> struct sm100_small_key_tuning<float, 4,  0, 8> { static constexpr in
 
 // ipt_21.tpb_256 1.068590  0.986635  1.059704  1.144921
 template <> struct sm100_small_key_tuning<double, 8,  0, 8> { static constexpr int threads = 256; static constexpr int items = 21; };
+
+// pairs 1-byte key
+
+// same as previous tuning
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 1,  1, 4> : sm90_small_key_tuning<1, 1, 4> {};
+
+// ipt_18.tpb_512 1.011463  0.978807  1.010106  1.024056
+// todo(@gonidelis): insignificant performance gain, need more runs.
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 1,  2, 4> { static constexpr int threads = 512; static constexpr int items = 18; };
+
+// ipt_18.tpb_512 1.008207  0.980377  1.007132  1.022155
+// todo(@gonidelis): insignificant performance gain, need more runs.
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 1,  4, 4> { static constexpr int threads = 512; static constexpr int items = 18; };
+
+// todo(@gonidelis): regresses for large problem sizes.
+// template <typename ValueT> struct sm100_small_key_tuning<ValueT, 1,  8, 4> { static constexpr int threads = 288; static constexpr int items = 16; };
+
+// ipt_21.tpb_576 1.044274  0.979145  1.038723  1.072068
+// todo(@gonidelis): insignificant performance gain, need more runs.
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 1,  16, 4> { static constexpr int threads = 576; static constexpr int items = 21; };
+
+// ipt_20.tpb_384 1.008881  0.968750  1.006846  1.026910
+// todo(@gonidelis): insignificant performance gain, need more runs.
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 1,  1, 8> { static constexpr int threads = 384; static constexpr int items = 20; };
+
+// ipt_22.tpb_256 1.015597  0.966038  1.011167  1.045921
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 1,  2, 8> { static constexpr int threads = 256; static constexpr int items = 22; };
+
+// ipt_15.tpb_384 1.029730  0.972699  1.029066  1.067894
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 1,  4, 8> { static constexpr int threads = 384; static constexpr int items = 15; };
+
+// todo(@gonidelis): regresses for large problem sizes.
+// template <typename ValueT> struct sm100_small_key_tuning<ValueT, 1,  8, 8> { static constexpr int threads = 256; static constexpr int items = 17; };
+
+// same as previous tuning
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 1,  16, 8> : sm90_small_key_tuning<1, 16, 8> {};
+
+
+// pairs 2-byte key
+
+// ipt_20.tpb_448  1.031929  0.936849  1.023411  1.075172
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 2,  1, 4> { static constexpr int threads = 448; static constexpr int items = 20; };
+
+// ipt_23.tpb_384 1.104683  0.939335  1.087342  1.234988
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 2,  2, 4> { static constexpr int threads = 384; static constexpr int items = 23; };
+
+// same as previous tuning
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 2,  4, 4>  : sm90_small_key_tuning<2, 4, 4> {};
+
+// todo(@gonidelis): regresses for large problem sizes.
+// template <typename ValueT> struct sm100_small_key_tuning<ValueT, 2,  8, 4> { static constexpr int threads = 256; static constexpr int items = 17; };
+
+// same as previous tuning
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 2,  16, 4> : sm90_small_key_tuning<2, 16, 4> {};
+
+// ipt_15.tpb_384 1.093598  1.000000  1.088111  1.183369
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 2,  1, 8> { static constexpr int threads = 384; static constexpr int items = 15; };
+
+// ipt_15.tpb_576 1.040476  1.000333  1.037060  1.084850
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 2,  2, 8> { static constexpr int threads = 576; static constexpr int items = 15; };
+
+// ipt_18.tpb_512 1.096819  0.953488  1.082026  1.209533
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 2,  4, 8> { static constexpr int threads = 512; static constexpr int items = 18; };
+
+// todo(@gonidelis): regresses for large problem sizes.
+// template <typename ValueT> struct sm100_small_key_tuning<ValueT, 2,  8, 8> { static constexpr int threads = 288; static constexpr int items = 16; };
+
+// same as previous tuning
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 2,  16, 8> : sm90_small_key_tuning<2, 16, 8> {};
+
+
+// pairs 4-byte key
+
+// ipt_21.tpb_416 1.237956  1.001909  1.210882  1.469981
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 4,  1, 4> { static constexpr int threads = 416; static constexpr int items = 21; };
+
+// ipt_17.tpb_512 1.022121  1.012346  1.022439  1.038524
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 4,  2, 4> { static constexpr int threads = 512; static constexpr int items = 17; };
+
+// ipt_20.tpb_448 1.012688  0.999531  1.011865  1.028513
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 4,  4, 4>  { static constexpr int threads = 448; static constexpr int items = 20; };
+
+// ipt_15.tpb_384 1.006872  0.998651  1.008374  1.026118
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 4,  8, 4> { static constexpr int threads = 384; static constexpr int items = 15; };
+
+// same as previous tuning
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 4,  16, 4> : sm90_small_key_tuning<4, 16, 4> {};
+
+// ipt_17.tpb_512 1.080000  0.927362  1.066211  1.172959
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 4,  1, 8> { static constexpr int threads = 512; static constexpr int items = 17; };
+
+// ipt_15.tpb_384 1.068529  1.000000  1.062277  1.135281
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 4,  2, 8> { static constexpr int threads = 384; static constexpr int items = 15; };
+
+// ipt_21.tpb_448  1.080642  0.927713  1.064758  1.191177
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 4,  4, 8> { static constexpr int threads = 448; static constexpr int items = 21; };
+
+// ipt_13.tpb_448 1.019046  0.991228  1.016971  1.039712
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 4,  8, 8> { static constexpr int threads = 448; static constexpr int items = 13; };
+
+// same as previous tuning
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 4,  16, 8> : sm90_small_key_tuning<4, 16, 8> {};
+
+// pairs 8-byte key
+
+// ipt_17.tpb_256 1.276445  1.025562  1.248511  1.496947
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 8,  1, 4> { static constexpr int threads = 256; static constexpr int items = 17; };
+
+// ipt_12.tpb_352 1.128086  1.040000  1.117960  1.207254
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 8,  2, 4> { static constexpr int threads = 352; static constexpr int items = 12; };
+
+// ipt_12.tpb_352 1.132699  1.040000  1.122676  1.207716
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 8,  4, 4>  { static constexpr int threads = 352; static constexpr int items = 12; };
+
+// ipt_18.tpb_256 1.266745  0.995432  1.237754  1.460538
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 8,  8, 4> { static constexpr int threads = 256; static constexpr int items = 18; };
+
+// same as previous tuning
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 8,  16, 4> : sm90_small_key_tuning<8, 16, 4> {};
+
+// ipt_15.tpb_384 1.007343  0.997656  1.006929  1.047208
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 8,  1, 8> { static constexpr int threads = 384; static constexpr int items = 15; };
+
+// ipt_14.tpb_256 1.186477  1.012683  1.167150  1.332313
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 8,  2, 8> { static constexpr int threads = 256; static constexpr int items = 14; };
+
+// ipt_21.tpb_256 1.220607  1.000239  1.196400  1.390471
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 8,  4, 8> { static constexpr int threads = 256; static constexpr int items = 21; };
+
+// same as previous tuning
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 8,  8, 8> :  sm90_small_key_tuning<8, 8, 8> {};
+
+// same as previous tuning
+template <typename ValueT> struct sm100_small_key_tuning<ValueT, 8,  16, 8> : sm90_small_key_tuning<8, 16, 8> {};
 // clang-format on
 
 /**