diff --git a/libs/pageserver_api/src/shard.rs b/libs/pageserver_api/src/shard.rs
index eca04b1f3d..8386d6e586 100644
--- a/libs/pageserver_api/src/shard.rs
+++ b/libs/pageserver_api/src/shard.rs
@@ -112,6 +112,16 @@ impl ShardIdentity {
         }
     }
 
+    /// An unsharded identity with the given stripe size (if non-zero). This is typically used to
+    /// carry over a stripe size for an unsharded tenant from persistent storage.
+    pub fn unsharded_with_stripe_size(stripe_size: ShardStripeSize) -> Self {
+        let mut shard_identity = Self::unsharded();
+        if stripe_size.0 > 0 {
+            shard_identity.stripe_size = stripe_size;
+        }
+        shard_identity
+    }
+
     /// A broken instance of this type is only used for `TenantState::Broken` tenants,
     /// which are constructed in code paths that don't have access to proper configuration.
     ///
diff --git a/pageserver/src/tenant/config.rs b/pageserver/src/tenant/config.rs
index 334fb04604..4308db84e5 100644
--- a/pageserver/src/tenant/config.rs
+++ b/pageserver/src/tenant/config.rs
@@ -219,7 +219,11 @@ impl LocationConf {
         };
 
         let shard = if conf.shard_count == 0 {
-            ShardIdentity::unsharded()
+            // NB: carry over the persisted stripe size instead of using the default. This doesn't
+            // matter for most practical purposes, since unsharded tenants don't use the stripe
+            // size, but can cause inconsistencies between storcon and Pageserver and cause manual
+            // splits without `new_stripe_size` to use an unintended stripe size.
+            ShardIdentity::unsharded_with_stripe_size(ShardStripeSize(conf.shard_stripe_size))
         } else {
             ShardIdentity::new(
                 ShardNumber(conf.shard_number),
diff --git a/storage_controller/src/persistence.rs b/storage_controller/src/persistence.rs
index 5146fe472e..4a97aac125 100644
--- a/storage_controller/src/persistence.rs
+++ b/storage_controller/src/persistence.rs
@@ -1613,23 +1613,49 @@ pub(crate) struct TenantShardPersistence {
 }
 
 impl TenantShardPersistence {
+    fn get_shard_count(&self) -> Result<ShardCount, ShardConfigError> {
+        self.shard_count
+            .try_into()
+            .map(ShardCount)
+            .map_err(|_| ShardConfigError::InvalidCount)
+    }
+
+    fn get_shard_number(&self) -> Result<ShardNumber, ShardConfigError> {
+        self.shard_number
+            .try_into()
+            .map(ShardNumber)
+            .map_err(|_| ShardConfigError::InvalidNumber)
+    }
+
+    fn get_stripe_size(&self) -> Result<ShardStripeSize, ShardConfigError> {
+        self.shard_stripe_size
+            .try_into()
+            .map(ShardStripeSize)
+            .map_err(|_| ShardConfigError::InvalidStripeSize)
+    }
+
     pub(crate) fn get_shard_identity(&self) -> Result<ShardIdentity, ShardConfigError> {
         if self.shard_count == 0 {
-            Ok(ShardIdentity::unsharded())
+            // NB: carry over the stripe size from the persisted record, to avoid consistency check
+            // failures if the persisted value differs from the default stripe size. The stripe size
+            // doesn't really matter for unsharded tenants anyway.
+            Ok(ShardIdentity::unsharded_with_stripe_size(
+                self.get_stripe_size()?,
+            ))
         } else {
             Ok(ShardIdentity::new(
-                ShardNumber(self.shard_number as u8),
-                ShardCount::new(self.shard_count as u8),
-                ShardStripeSize(self.shard_stripe_size as u32),
+                self.get_shard_number()?,
+                self.get_shard_count()?,
+                self.get_stripe_size()?,
             )?)
         }
     }
 
-    pub(crate) fn get_tenant_shard_id(&self) -> Result<TenantShardId, hex::FromHexError> {
+    pub(crate) fn get_tenant_shard_id(&self) -> anyhow::Result<TenantShardId> {
         Ok(TenantShardId {
             tenant_id: TenantId::from_str(self.tenant_id.as_str())?,
-            shard_number: ShardNumber(self.shard_number as u8),
-            shard_count: ShardCount::new(self.shard_count as u8),
+            shard_number: self.get_shard_number()?,
+            shard_count: self.get_shard_count()?,
         })
     }
 }