diff --git a/packages/beacon-node/src/network/network.ts b/packages/beacon-node/src/network/network.ts
index 2faf2371e5c..56fcde7630a 100644
--- a/packages/beacon-node/src/network/network.ts
+++ b/packages/beacon-node/src/network/network.ts
@@ -511,7 +511,7 @@ export class Network implements INetwork {
 
   async sendBlobSidecarsByRoot(peerId: PeerIdStr, request: BlobSidecarsByRootRequest): Promise<deneb.BlobSidecar[]> {
     return collectMaxResponseTyped(
-      this.sendReqRespRequest(peerId, ReqRespMethod.BlobSidecarsByRoot, [Version.V1], request),
+      this.sendReqRespRequest(peerId, ReqRespMethod.BlobSidecarsByRoot, [Version.V1], request), // TODO
       request.length,
       responseSszTypeByMethod[ReqRespMethod.BlobSidecarsByRoot]
     );
diff --git a/packages/beacon-node/src/network/reqresp/beaconBlocksMaybeBlobsByRoot.ts b/packages/beacon-node/src/network/reqresp/beaconBlocksMaybeBlobsByRoot.ts
index 3bbe00bfc56..00a2744b44d 100644
--- a/packages/beacon-node/src/network/reqresp/beaconBlocksMaybeBlobsByRoot.ts
+++ b/packages/beacon-node/src/network/reqresp/beaconBlocksMaybeBlobsByRoot.ts
@@ -52,7 +52,7 @@ export async function beaconBlocksMaybeBlobsByRoot(
 
   let allBlobSidecars: deneb.BlobSidecar[];
   if (blobIdentifiers.length > 0) {
-    allBlobSidecars = await network.sendBlobSidecarsByRoot(peerId, blobIdentifiers);
+    allBlobSidecars = await network.sendBlobSidecarsByRoot(peerId, blobIdentifiers); // TODO
   } else {
     allBlobSidecars = [];
   }
@@ -228,7 +228,7 @@ export async function unavailableBeaconBlobsByRoot(
   }
 
   if (networkReqIdentifiers.length > 0) {
-    networkResBlobSidecars = await network.sendBlobSidecarsByRoot(peerId, networkReqIdentifiers);
+    networkResBlobSidecars = await network.sendBlobSidecarsByRoot(peerId, networkReqIdentifiers); // TODO
     metrics?.blockInputFetchStats.dataPromiseBlobsFinallyAvailableFromNetwork.inc(networkResBlobSidecars.length);
     if (blockTriedBefore) {
       metrics?.blockInputFetchStats.dataPromiseBlobsRetriedAvailableFromNetwork.inc(networkResBlobSidecars.length);
diff --git a/packages/beacon-node/src/network/reqresp/handlers/index.ts b/packages/beacon-node/src/network/reqresp/handlers/index.ts
index 83f6620dbbd..8567915c7fb 100644
--- a/packages/beacon-node/src/network/reqresp/handlers/index.ts
+++ b/packages/beacon-node/src/network/reqresp/handlers/index.ts
@@ -38,8 +38,8 @@ export function getReqRespHandlers({db, chain}: {db: IBeaconDb; chain: IBeaconCh
       return onBeaconBlocksByRoot(body, chain, db);
     },
     [ReqRespMethod.BlobSidecarsByRoot]: (req) => {
-      const body = BlobSidecarsByRootRequestType(chain.config).deserialize(req.data);
-      return onBlobSidecarsByRoot(body, chain, db);
+      const body = BlobSidecarsByRootRequestType(fork, chain.config).deserialize(req.data);
+      return onBlobSidecarsByRoot(body, chain, db)
     },
     [ReqRespMethod.BlobSidecarsByRange]: (req) => {
       const body = ssz.deneb.BlobSidecarsByRangeRequest.deserialize(req.data);
diff --git a/packages/beacon-node/src/network/reqresp/rateLimit.ts b/packages/beacon-node/src/network/reqresp/rateLimit.ts
index 771d01f6c33..a875d332b52 100644
--- a/packages/beacon-node/src/network/reqresp/rateLimit.ts
+++ b/packages/beacon-node/src/network/reqresp/rateLimit.ts
@@ -39,7 +39,7 @@ export const rateLimitQuotas: (config: ChainConfig) => Record<ReqRespMethod, Inb
   },
   [ReqRespMethod.BlobSidecarsByRoot]: {
     // Rationale: quota of BeaconBlocksByRoot * MAX_BLOBS_PER_BLOCK
-    byPeer: {quota: config.MAX_REQUEST_BLOB_SIDECARS, quotaTimeMs: 10_000},
+    byPeer: {quota: config.MAX_REQUEST_BLOB_SIDECARS, quotaTimeMs: 10_000}, // TODO 
     getRequestCount: getRequestCountFn(config, ReqRespMethod.BlobSidecarsByRoot, (req) => req.length),
   },
   [ReqRespMethod.LightClientBootstrap]: {
diff --git a/packages/beacon-node/src/network/reqresp/types.ts b/packages/beacon-node/src/network/reqresp/types.ts
index b7c18ebdfeb..f2178ce7a03 100644
--- a/packages/beacon-node/src/network/reqresp/types.ts
+++ b/packages/beacon-node/src/network/reqresp/types.ts
@@ -80,7 +80,7 @@ export const requestSszTypeByMethod: (config: ChainConfig) => {
   [ReqRespMethod.BeaconBlocksByRange]: ssz.phase0.BeaconBlocksByRangeRequest,
   [ReqRespMethod.BeaconBlocksByRoot]: ssz.phase0.BeaconBlocksByRootRequest,
   [ReqRespMethod.BlobSidecarsByRange]: ssz.deneb.BlobSidecarsByRangeRequest,
-  [ReqRespMethod.BlobSidecarsByRoot]: BlobSidecarsByRootRequestType(config),
+  [ReqRespMethod.BlobSidecarsByRoot]: BlobSidecarsByRootRequestType(fork, config),
   [ReqRespMethod.LightClientBootstrap]: ssz.Root,
   [ReqRespMethod.LightClientUpdatesByRange]: ssz.altair.LightClientUpdatesByRange,
   [ReqRespMethod.LightClientFinalityUpdate]: null,
diff --git a/packages/beacon-node/src/util/types.ts b/packages/beacon-node/src/util/types.ts
index 5b9c7a78427..d022125991d 100644
--- a/packages/beacon-node/src/util/types.ts
+++ b/packages/beacon-node/src/util/types.ts
@@ -1,5 +1,6 @@
 import {ContainerType, ListCompositeType, ValueOf} from "@chainsafe/ssz";
 import {ChainConfig} from "@lodestar/config";
+import { ForkName, isForkPostElectra } from "@lodestar/params";
 import {ssz} from "@lodestar/types";
 
 // Misc SSZ types used only in the beacon-node package, no need to upstream to types
@@ -14,6 +15,6 @@ export const signedBLSToExecutionChangeVersionedType = new ContainerType(
 );
 export type SignedBLSToExecutionChangeVersioned = ValueOf<typeof signedBLSToExecutionChangeVersionedType>;
 
-export const BlobSidecarsByRootRequestType = (config: ChainConfig) =>
-  new ListCompositeType(ssz.deneb.BlobIdentifier, config.MAX_REQUEST_BLOB_SIDECARS);
+export const BlobSidecarsByRootRequestType = (fork: ForkName, config: ChainConfig) =>
+  new ListCompositeType(ssz.deneb.BlobIdentifier, isForkPostElectra(fork) ? config.MAX_REQUEST_BLOB_SIDECARS_ELECTRA : config.MAX_REQUEST_BLOB_SIDECARS); // TODO
 export type BlobSidecarsByRootRequest = ValueOf<ReturnType<typeof BlobSidecarsByRootRequestType>>;