diff --git a/src/pack/blob.ts b/src/pack/blob.ts
index 27b38c3..4b8e96d 100644
--- a/src/pack/blob.ts
+++ b/src/pack/blob.ts
@@ -8,7 +8,7 @@ import { MemoryBlockStore } from '../blockstore/memory'
 import { pack } from './index'
 import type { PackProperties } from './index'
 
-export async function packToBlob ({ input, blockstore: userBlockstore, hasher, maxChunkSize, maxChildrenPerNode, wrapWithDirectory }: PackProperties) {
+export async function packToBlob ({ input, blockstore: userBlockstore, hasher, maxChunkSize, maxChildrenPerNode, wrapWithDirectory, shardSplitThreshold }: PackProperties) {
   const blockstore = userBlockstore ? userBlockstore : new MemoryBlockStore()
   const { root, out } = await pack({
     input,
@@ -16,7 +16,8 @@ export async function packToBlob ({ input, blockstore: userBlockstore, hasher, m
     hasher,
     maxChunkSize,
     maxChildrenPerNode,
-    wrapWithDirectory
+    wrapWithDirectory,
+    shardSplitThreshold
   })
 
   const carParts = await all(out)
diff --git a/src/pack/fs.ts b/src/pack/fs.ts
index 8c3c1e5..ae4a291 100644
--- a/src/pack/fs.ts
+++ b/src/pack/fs.ts
@@ -12,7 +12,7 @@ export type PackToFsProperties = PackProperties & {
   output?: string
 }
 
-export async function packToFs ({ input, output, blockstore: userBlockstore, hasher, maxChunkSize, maxChildrenPerNode, wrapWithDirectory }: PackToFsProperties) {
+export async function packToFs ({ input, output, blockstore: userBlockstore, hasher, maxChunkSize, maxChildrenPerNode, wrapWithDirectory, shardSplitThreshold }: PackToFsProperties) {
   const blockstore = userBlockstore ? userBlockstore : new FsBlockStore()
   const location = output || `${os.tmpdir()}/${(parseInt(String(Math.random() * 1e9), 10)).toString() + Date.now()}`
   const writable = fs.createWriteStream(location)
@@ -24,7 +24,8 @@ export async function packToFs ({ input, output, blockstore: userBlockstore, has
     hasher,
     maxChunkSize,
     maxChildrenPerNode,
-    wrapWithDirectory
+    wrapWithDirectory,
+    shardSplitThreshold
   })
 
   if (!userBlockstore) {
diff --git a/src/pack/index.ts b/src/pack/index.ts
index d6535d4..ca53b9a 100644
--- a/src/pack/index.ts
+++ b/src/pack/index.ts
@@ -20,10 +20,11 @@ export type PackProperties = {
   maxChunkSize?: number,
   maxChildrenPerNode?: number,
   wrapWithDirectory?: boolean,
-  hasher?: MultihashHasher
+  hasher?: MultihashHasher,
+  shardSplitThreshold?: number 
 }
 
-export async function pack ({ input, blockstore: userBlockstore, hasher, maxChunkSize, maxChildrenPerNode, wrapWithDirectory }: PackProperties) {
+export async function pack ({ input, blockstore: userBlockstore, hasher, maxChunkSize, maxChildrenPerNode, wrapWithDirectory, shardSplitThreshold }: PackProperties) {
   if (!input || (Array.isArray(input) && !input.length)) {
     throw new Error('missing input file(s)')
   }
@@ -38,7 +39,8 @@ export async function pack ({ input, blockstore: userBlockstore, hasher, maxChun
       hasher: hasher || unixfsImporterOptionsDefault.hasher,
       maxChunkSize: maxChunkSize || unixfsImporterOptionsDefault.maxChunkSize,
       maxChildrenPerNode: maxChildrenPerNode || unixfsImporterOptionsDefault.maxChildrenPerNode,
-      wrapWithDirectory: wrapWithDirectory === false ? false : unixfsImporterOptionsDefault.wrapWithDirectory
+      wrapWithDirectory: wrapWithDirectory === false ? false : unixfsImporterOptionsDefault.wrapWithDirectory,
+      ...(shardSplitThreshold) && { shardSplitThreshold : shardSplitThreshold }
     })
   ))
 
diff --git a/src/pack/stream.ts b/src/pack/stream.ts
index 4ef2bcb..d21d3ad 100644
--- a/src/pack/stream.ts
+++ b/src/pack/stream.ts
@@ -20,7 +20,7 @@ export type PackToStreamProperties = PackProperties & {
 }
 
 // Node version of toCar with Node Stream Writable
-export async function packToStream ({ input, writable, blockstore: userBlockstore, hasher, maxChunkSize, maxChildrenPerNode, wrapWithDirectory }: PackToStreamProperties) {
+export async function packToStream ({ input, writable, blockstore: userBlockstore, hasher, maxChunkSize, maxChildrenPerNode, wrapWithDirectory, shardSplitThreshold }: PackToStreamProperties) {
   if (!input || (Array.isArray(input) && !input.length)) {
     throw new Error('given input could not be parsed correctly')
   }
@@ -37,7 +37,8 @@ export async function packToStream ({ input, writable, blockstore: userBlockstor
       hasher: hasher || unixfsImporterOptionsDefault.hasher,
       maxChunkSize: maxChunkSize || unixfsImporterOptionsDefault.maxChunkSize,
       maxChildrenPerNode: maxChildrenPerNode || unixfsImporterOptionsDefault.maxChildrenPerNode,
-      wrapWithDirectory: wrapWithDirectory === false ? false : unixfsImporterOptionsDefault.wrapWithDirectory
+      wrapWithDirectory: wrapWithDirectory === false ? false : unixfsImporterOptionsDefault.wrapWithDirectory,
+      ...(shardSplitThreshold) && { shardSplitThreshold : shardSplitThreshold }
     })
   ))