Boom Racing #TRF501XBBZ High Performance Full Ball Bearings Set Rubber Sealed (25 Totals) for Tamiya TRF501X Lightweight upgrade instantly enhances overall performance in handling and durability. Fits perfectly. Takes 7 to 15 business days by standard airmail shipping. 80% of packages arrive within 10 business days. Most packages ship within 12 hours. Please allow 1 extra day if order is placed during the weekend. Expediated shipping is shipped by dhl or fedex. Arrives in about than 2-5 days. Major cities will receive orders earlier.