J&T Bearing Co. Tekno EB48 2.1 Endurance Bearing KitJTB JT10762 J&T Bearing Tekno EB48 2. 1 Endurance Bearing Kit. This kit is compatible with the Tekno EB48 2. 1 buggy. The "Endurance" kit is perfect for those looking to upgrade from stock kit bearings, or serious racers on a budget. Even at a value price, these bearings are still packed with features! Polished Steel Balls, J Type ball retainer, grease filled, ABEC 5 rated, and rubber seals create a bearing kit that offers the features racers need at