Traxxas One Way Bearing: TMX, Revo, SLY TRA5211R is compatible with TRA440541D1, TRA440541D2, TRA440541D3, TRA440541D4, TRA4807, TRA480771T1, TRA480771T2, TRA480771T3, TRA480771T4, TRA48077T1, TRA48077T2, TRA48077T3, TRA48077T4, TRA4807T2, TRA4807T3, TRA4809, TRA4907, TRA490771T1, TRA490771T2, TRA490771T3, TRA490771T4, TRA4907T1, TRA4907T2, TRA4907T3, TRA4907T4, TRA5309, TRA5309T1, TRA5309T2, TRA5309T3, TRA5309T4, TRA5507, TRA5507T1, TRA5507T3, TRA5507T4, TRA5509, TRA590761D1, TRA590761D2, TRA590761D3, TRA590761D4