diff --git a/bin/node-template/runtime/src/lib.rs b/bin/node-template/runtime/src/lib.rs
index 2347d37330be4..8fae73ef08571 100644
--- a/bin/node-template/runtime/src/lib.rs
+++ b/bin/node-template/runtime/src/lib.rs
@@ -214,6 +214,7 @@ impl pallet_grandpa::Config for Runtime {
 
 	type WeightInfo = ();
 	type MaxAuthorities = ConstU32<32>;
+	type MaxNominators = ConstU32<0>;
 	type MaxSetIdSessionEntries = ConstU64<0>;
 
 	type KeyOwnerProof = sp_core::Void;
diff --git a/bin/node/runtime/src/lib.rs b/bin/node/runtime/src/lib.rs
index 6a093996e8e52..e6c52216b7910 100644
--- a/bin/node/runtime/src/lib.rs
+++ b/bin/node/runtime/src/lib.rs
@@ -417,6 +417,7 @@ impl pallet_babe::Config for Runtime {
 	type DisabledValidators = Session;
 	type WeightInfo = ();
 	type MaxAuthorities = MaxAuthorities;
+	type MaxNominators = MaxNominatorRewardedPerValidator;
 	type KeyOwnerProof =
 		<Historical as KeyOwnerProofSystem<(KeyTypeId, pallet_babe::AuthorityId)>>::Proof;
 	type EquivocationReportSystem =
@@ -1356,6 +1357,7 @@ impl pallet_grandpa::Config for Runtime {
 	type RuntimeEvent = RuntimeEvent;
 	type WeightInfo = ();
 	type MaxAuthorities = MaxAuthorities;
+	type MaxNominators = MaxNominatorRewardedPerValidator;
 	type MaxSetIdSessionEntries = MaxSetIdSessionEntries;
 	type KeyOwnerProof = <Historical as KeyOwnerProofSystem<(KeyTypeId, GrandpaId)>>::Proof;
 	type EquivocationReportSystem =
diff --git a/frame/babe/src/default_weights.rs b/frame/babe/src/default_weights.rs
index 2e880fd67cc22..1f7de2b28c252 100644
--- a/frame/babe/src/default_weights.rs
+++ b/frame/babe/src/default_weights.rs
@@ -28,15 +28,11 @@ impl crate::WeightInfo for () {
 		DbWeight::get().writes(1)
 	}
 
-	fn report_equivocation(validator_count: u32) -> Weight {
+	fn report_equivocation(validator_count: u32, max_nominators_per_validator: u32) -> Weight {
 		// we take the validator set count from the membership proof to
 		// calculate the weight but we set a floor of 100 validators.
 		let validator_count = validator_count.max(100) as u64;
 
-		// worst case we are considering is that the given offender
-		// is backed by 200 nominators
-		const MAX_NOMINATORS: u64 = 200;
-
 		// checking membership proof
 		Weight::from_parts(35u64 * WEIGHT_REF_TIME_PER_MICROS, 0)
 			.saturating_add(
@@ -49,10 +45,10 @@ impl crate::WeightInfo for () {
 			// report offence
 			.saturating_add(Weight::from_parts(110u64 * WEIGHT_REF_TIME_PER_MICROS, 0))
 			.saturating_add(Weight::from_parts(
-				25u64 * WEIGHT_REF_TIME_PER_MICROS * MAX_NOMINATORS,
+				25u64 * WEIGHT_REF_TIME_PER_MICROS * max_nominators_per_validator as u64,
 				0,
 			))
-			.saturating_add(DbWeight::get().reads(14 + 3 * MAX_NOMINATORS))
-			.saturating_add(DbWeight::get().writes(10 + 3 * MAX_NOMINATORS))
+			.saturating_add(DbWeight::get().reads(14 + 3 * max_nominators_per_validator as u64))
+			.saturating_add(DbWeight::get().writes(10 + 3 * max_nominators_per_validator as u64))
 	}
 }
diff --git a/frame/babe/src/lib.rs b/frame/babe/src/lib.rs
index eff56515a38d0..9549fac9fe2b6 100644
--- a/frame/babe/src/lib.rs
+++ b/frame/babe/src/lib.rs
@@ -72,7 +72,7 @@ pub use pallet::*;
 
 pub trait WeightInfo {
 	fn plan_config_change() -> Weight;
-	fn report_equivocation(validator_count: u32) -> Weight;
+	fn report_equivocation(validator_count: u32, max_nominators_per_validator: u32) -> Weight;
 }
 
 /// Trigger an epoch change, if any should take place.
@@ -153,6 +153,10 @@ pub mod pallet {
 		#[pallet::constant]
 		type MaxAuthorities: Get<u32>;
 
+		/// The maximum number of nominators for each validator.
+		#[pallet::constant]
+		type MaxNominators: Get<u32>;
+
 		/// The proof of key ownership, used for validating equivocation reports.
 		/// The proof must include the session index and validator count of the
 		/// session at which the equivocation occurred.
@@ -407,6 +411,7 @@ pub mod pallet {
 		#[pallet::call_index(0)]
 		#[pallet::weight(<T as Config>::WeightInfo::report_equivocation(
 			key_owner_proof.validator_count(),
+			T::MaxNominators::get(),
 		))]
 		pub fn report_equivocation(
 			origin: OriginFor<T>,
@@ -433,6 +438,7 @@ pub mod pallet {
 		#[pallet::call_index(1)]
 		#[pallet::weight(<T as Config>::WeightInfo::report_equivocation(
 			key_owner_proof.validator_count(),
+			T::MaxNominators::get(),
 		))]
 		pub fn report_equivocation_unsigned(
 			origin: OriginFor<T>,
diff --git a/frame/babe/src/mock.rs b/frame/babe/src/mock.rs
index b4a7e89ceb04e..dc8e8e3499fad 100644
--- a/frame/babe/src/mock.rs
+++ b/frame/babe/src/mock.rs
@@ -223,6 +223,7 @@ impl Config for Test {
 	type DisabledValidators = Session;
 	type WeightInfo = ();
 	type MaxAuthorities = ConstU32<10>;
+	type MaxNominators = ConstU32<100>;
 	type KeyOwnerProof = <Historical as KeyOwnerProofSystem<(KeyTypeId, AuthorityId)>>::Proof;
 	type EquivocationReportSystem =
 		super::EquivocationReportSystem<Self, Offences, Historical, ReportLongevity>;
diff --git a/frame/babe/src/tests.rs b/frame/babe/src/tests.rs
index 38edc2af7f272..ae0c3e3873c50 100644
--- a/frame/babe/src/tests.rs
+++ b/frame/babe/src/tests.rs
@@ -815,7 +815,7 @@ fn report_equivocation_has_valid_weight() {
 	// the weight depends on the size of the validator set,
 	// but there's a lower bound of 100 validators.
 	assert!((1..=100)
-		.map(<Test as Config>::WeightInfo::report_equivocation)
+		.map(|validators| <Test as Config>::WeightInfo::report_equivocation(validators, 1000))
 		.collect::<Vec<_>>()
 		.windows(2)
 		.all(|w| w[0] == w[1]));
@@ -823,7 +823,7 @@ fn report_equivocation_has_valid_weight() {
 	// after 100 validators the weight should keep increasing
 	// with every extra validator.
 	assert!((100..=1000)
-		.map(<Test as Config>::WeightInfo::report_equivocation)
+		.map(|validators| <Test as Config>::WeightInfo::report_equivocation(validators, 1000))
 		.collect::<Vec<_>>()
 		.windows(2)
 		.all(|w| w[0].ref_time() < w[1].ref_time()));
diff --git a/frame/beefy-mmr/src/mock.rs b/frame/beefy-mmr/src/mock.rs
index 8594184ad71ab..b17550653d5ea 100644
--- a/frame/beefy-mmr/src/mock.rs
+++ b/frame/beefy-mmr/src/mock.rs
@@ -118,6 +118,7 @@ impl pallet_mmr::Config for Test {
 impl pallet_beefy::Config for Test {
 	type BeefyId = BeefyId;
 	type MaxAuthorities = ConstU32<100>;
+	type MaxNominators = ConstU32<1000>;
 	type MaxSetIdSessionEntries = ConstU64<100>;
 	type OnNewValidatorSet = BeefyMmr;
 	type WeightInfo = ();
diff --git a/frame/beefy/src/default_weights.rs b/frame/beefy/src/default_weights.rs
index b15f1c88f9611..091d58f47f978 100644
--- a/frame/beefy/src/default_weights.rs
+++ b/frame/beefy/src/default_weights.rs
@@ -24,14 +24,11 @@ use frame_support::weights::{
 };
 
 impl crate::WeightInfo for () {
-	fn report_equivocation(validator_count: u32) -> Weight {
+	fn report_equivocation(validator_count: u32, max_nominators_per_validator: u32) -> Weight {
 		// we take the validator set count from the membership proof to
 		// calculate the weight but we set a floor of 100 validators.
 		let validator_count = validator_count.max(100) as u64;
 
-		// worst case we are considering is that the given offender is backed by 200 nominators
-		const MAX_NOMINATORS: u64 = 200;
-
 		// checking membership proof
 		Weight::from_parts(35u64 * WEIGHT_REF_TIME_PER_MICROS, 0)
 			.saturating_add(
@@ -44,11 +41,11 @@ impl crate::WeightInfo for () {
 			// report offence
 			.saturating_add(Weight::from_parts(110u64 * WEIGHT_REF_TIME_PER_MICROS, 0))
 			.saturating_add(Weight::from_parts(
-				25u64 * WEIGHT_REF_TIME_PER_MICROS * MAX_NOMINATORS,
+				25u64 * WEIGHT_REF_TIME_PER_MICROS * max_nominators_per_validator as u64,
 				0,
 			))
-			.saturating_add(DbWeight::get().reads(14 + 3 * MAX_NOMINATORS))
-			.saturating_add(DbWeight::get().writes(10 + 3 * MAX_NOMINATORS))
+			.saturating_add(DbWeight::get().reads(14 + 3 * max_nominators_per_validator as u64))
+			.saturating_add(DbWeight::get().writes(10 + 3 * max_nominators_per_validator as u64))
 			// fetching set id -> session index mappings
 			.saturating_add(DbWeight::get().reads(2))
 	}
diff --git a/frame/beefy/src/lib.rs b/frame/beefy/src/lib.rs
index da469c5b9ca02..35d3273e1ef76 100644
--- a/frame/beefy/src/lib.rs
+++ b/frame/beefy/src/lib.rs
@@ -78,6 +78,10 @@ pub mod pallet {
 		#[pallet::constant]
 		type MaxAuthorities: Get<u32>;
 
+		/// The maximum number of nominators for each validator.
+		#[pallet::constant]
+		type MaxNominators: Get<u32>;
+
 		/// The maximum number of entries to keep in the set id to session index mapping.
 		///
 		/// Since the `SetIdSession` map is only used for validating equivocations this
@@ -203,7 +207,10 @@ pub mod pallet {
 		/// against the extracted offender. If both are valid, the offence
 		/// will be reported.
 		#[pallet::call_index(0)]
-		#[pallet::weight(T::WeightInfo::report_equivocation(key_owner_proof.validator_count()))]
+		#[pallet::weight(T::WeightInfo::report_equivocation(
+			key_owner_proof.validator_count(),
+			T::MaxNominators::get(),
+		))]
 		pub fn report_equivocation(
 			origin: OriginFor<T>,
 			equivocation_proof: Box<
@@ -235,7 +242,10 @@ pub mod pallet {
 		/// if the block author is defined it will be defined as the equivocation
 		/// reporter.
 		#[pallet::call_index(1)]
-		#[pallet::weight(T::WeightInfo::report_equivocation(key_owner_proof.validator_count()))]
+		#[pallet::weight(T::WeightInfo::report_equivocation(
+			key_owner_proof.validator_count(),
+			T::MaxNominators::get(),
+		))]
 		pub fn report_equivocation_unsigned(
 			origin: OriginFor<T>,
 			equivocation_proof: Box<
@@ -441,5 +451,5 @@ impl<T: Config> IsMember<T::BeefyId> for Pallet<T> {
 }
 
 pub trait WeightInfo {
-	fn report_equivocation(validator_count: u32) -> Weight;
+	fn report_equivocation(validator_count: u32, max_nominators_per_validator: u32) -> Weight;
 }
diff --git a/frame/beefy/src/mock.rs b/frame/beefy/src/mock.rs
index 40dcf4d7e70d3..26a13fe16ca41 100644
--- a/frame/beefy/src/mock.rs
+++ b/frame/beefy/src/mock.rs
@@ -110,6 +110,7 @@ parameter_types! {
 impl pallet_beefy::Config for Test {
 	type BeefyId = BeefyId;
 	type MaxAuthorities = ConstU32<100>;
+	type MaxNominators = ConstU32<1000>;
 	type MaxSetIdSessionEntries = MaxSetIdSessionEntries;
 	type OnNewValidatorSet = ();
 	type WeightInfo = ();
diff --git a/frame/beefy/src/tests.rs b/frame/beefy/src/tests.rs
index f9da20e90dc74..8a8c6ae1092b4 100644
--- a/frame/beefy/src/tests.rs
+++ b/frame/beefy/src/tests.rs
@@ -716,7 +716,7 @@ fn report_equivocation_has_valid_weight() {
 	// the weight depends on the size of the validator set,
 	// but there's a lower bound of 100 validators.
 	assert!((1..=100)
-		.map(<Test as Config>::WeightInfo::report_equivocation)
+		.map(|validators| <Test as Config>::WeightInfo::report_equivocation(validators, 1000))
 		.collect::<Vec<_>>()
 		.windows(2)
 		.all(|w| w[0] == w[1]));
@@ -724,7 +724,7 @@ fn report_equivocation_has_valid_weight() {
 	// after 100 validators the weight should keep increasing
 	// with every extra validator.
 	assert!((100..=1000)
-		.map(<Test as Config>::WeightInfo::report_equivocation)
+		.map(|validators| <Test as Config>::WeightInfo::report_equivocation(validators, 1000))
 		.collect::<Vec<_>>()
 		.windows(2)
 		.all(|w| w[0].ref_time() < w[1].ref_time()));
diff --git a/frame/grandpa/src/default_weights.rs b/frame/grandpa/src/default_weights.rs
index 3afd714f47e57..5ccf3794880eb 100644
--- a/frame/grandpa/src/default_weights.rs
+++ b/frame/grandpa/src/default_weights.rs
@@ -24,15 +24,11 @@ use frame_support::weights::{
 };
 
 impl crate::WeightInfo for () {
-	fn report_equivocation(validator_count: u32) -> Weight {
+	fn report_equivocation(validator_count: u32, max_nominators_per_validator: u32) -> Weight {
 		// we take the validator set count from the membership proof to
 		// calculate the weight but we set a floor of 100 validators.
 		let validator_count = validator_count.max(100) as u64;
 
-		// worst case we are considering is that the given offender
-		// is backed by 200 nominators
-		const MAX_NOMINATORS: u64 = 200;
-
 		// checking membership proof
 		Weight::from_parts(35u64 * WEIGHT_REF_TIME_PER_MICROS, 0)
 			.saturating_add(
@@ -45,11 +41,11 @@ impl crate::WeightInfo for () {
 			// report offence
 			.saturating_add(Weight::from_parts(110u64 * WEIGHT_REF_TIME_PER_MICROS, 0))
 			.saturating_add(Weight::from_parts(
-				25u64 * WEIGHT_REF_TIME_PER_MICROS * MAX_NOMINATORS,
+				25u64 * WEIGHT_REF_TIME_PER_MICROS * max_nominators_per_validator as u64,
 				0,
 			))
-			.saturating_add(DbWeight::get().reads(14 + 3 * MAX_NOMINATORS))
-			.saturating_add(DbWeight::get().writes(10 + 3 * MAX_NOMINATORS))
+			.saturating_add(DbWeight::get().reads(14 + 3 * max_nominators_per_validator as u64))
+			.saturating_add(DbWeight::get().writes(10 + 3 * max_nominators_per_validator as u64))
 			// fetching set id -> session index mappings
 			.saturating_add(DbWeight::get().reads(2))
 	}
diff --git a/frame/grandpa/src/lib.rs b/frame/grandpa/src/lib.rs
index 204bcfa826b77..2a0e707ac4148 100644
--- a/frame/grandpa/src/lib.rs
+++ b/frame/grandpa/src/lib.rs
@@ -95,6 +95,10 @@ pub mod pallet {
 		#[pallet::constant]
 		type MaxAuthorities: Get<u32>;
 
+		/// The maximum number of nominators for each validator.
+		#[pallet::constant]
+		type MaxNominators: Get<u32>;
+
 		/// The maximum number of entries to keep in the set id to session index mapping.
 		///
 		/// Since the `SetIdSession` map is only used for validating equivocations this
@@ -189,7 +193,10 @@ pub mod pallet {
 		/// against the extracted offender. If both are valid, the offence
 		/// will be reported.
 		#[pallet::call_index(0)]
-		#[pallet::weight(T::WeightInfo::report_equivocation(key_owner_proof.validator_count()))]
+		#[pallet::weight(T::WeightInfo::report_equivocation(
+			key_owner_proof.validator_count(),
+			T::MaxNominators::get(),
+		))]
 		pub fn report_equivocation(
 			origin: OriginFor<T>,
 			equivocation_proof: Box<EquivocationProof<T::Hash, BlockNumberFor<T>>>,
@@ -215,7 +222,10 @@ pub mod pallet {
 		/// if the block author is defined it will be defined as the equivocation
 		/// reporter.
 		#[pallet::call_index(1)]
-		#[pallet::weight(T::WeightInfo::report_equivocation(key_owner_proof.validator_count()))]
+		#[pallet::weight(T::WeightInfo::report_equivocation(
+			key_owner_proof.validator_count(),
+			T::MaxNominators::get(),
+		))]
 		pub fn report_equivocation_unsigned(
 			origin: OriginFor<T>,
 			equivocation_proof: Box<EquivocationProof<T::Hash, BlockNumberFor<T>>>,
@@ -365,7 +375,7 @@ pub mod pallet {
 }
 
 pub trait WeightInfo {
-	fn report_equivocation(validator_count: u32) -> Weight;
+	fn report_equivocation(validator_count: u32, max_nominators_per_validator: u32) -> Weight;
 	fn note_stalled() -> Weight;
 }
 
diff --git a/frame/grandpa/src/mock.rs b/frame/grandpa/src/mock.rs
index 35a0d99c566c0..86f91ba803230 100644
--- a/frame/grandpa/src/mock.rs
+++ b/frame/grandpa/src/mock.rs
@@ -223,6 +223,7 @@ impl Config for Test {
 	type RuntimeEvent = RuntimeEvent;
 	type WeightInfo = ();
 	type MaxAuthorities = ConstU32<100>;
+	type MaxNominators = ConstU32<1000>;
 	type MaxSetIdSessionEntries = MaxSetIdSessionEntries;
 	type KeyOwnerProof = <Historical as KeyOwnerProofSystem<(KeyTypeId, AuthorityId)>>::Proof;
 	type EquivocationReportSystem =
diff --git a/frame/grandpa/src/tests.rs b/frame/grandpa/src/tests.rs
index 16d89307bb71f..59d73ee729ee8 100644
--- a/frame/grandpa/src/tests.rs
+++ b/frame/grandpa/src/tests.rs
@@ -838,7 +838,7 @@ fn report_equivocation_has_valid_weight() {
 	// the weight depends on the size of the validator set,
 	// but there's a lower bound of 100 validators.
 	assert!((1..=100)
-		.map(<Test as Config>::WeightInfo::report_equivocation)
+		.map(|validators| <Test as Config>::WeightInfo::report_equivocation(validators, 1000))
 		.collect::<Vec<_>>()
 		.windows(2)
 		.all(|w| w[0] == w[1]));
@@ -846,7 +846,7 @@ fn report_equivocation_has_valid_weight() {
 	// after 100 validators the weight should keep increasing
 	// with every extra validator.
 	assert!((100..=1000)
-		.map(<Test as Config>::WeightInfo::report_equivocation)
+		.map(|validators| <Test as Config>::WeightInfo::report_equivocation(validators, 1000))
 		.collect::<Vec<_>>()
 		.windows(2)
 		.all(|w| w[0].ref_time() < w[1].ref_time()));
diff --git a/test-utils/runtime/src/lib.rs b/test-utils/runtime/src/lib.rs
index ee391a6ec2147..b17c31fb3ea04 100644
--- a/test-utils/runtime/src/lib.rs
+++ b/test-utils/runtime/src/lib.rs
@@ -419,6 +419,7 @@ impl pallet_babe::Config for Runtime {
 	type EquivocationReportSystem = ();
 	type WeightInfo = ();
 	type MaxAuthorities = ConstU32<10>;
+	type MaxNominators = ConstU32<100>;
 }
 
 /// Adds one to the given input and returns the final result.