J&T Bearing Co - 5x13x4 Ultimate Clutch Bearing (single)
 
J&T Bearing's Ultimate Clutch bearings feature's a deeper groove in the bearing races along with a high temperature poly crown to withstand the higher RPM's and high temperatures of today's 1/8 scale clutches. The components of the bearing are protected by no contact metal shields for long life. 
*We suggest blowing some of the excess grease out of the bearings with compressed air before installation.