Rear wheel has 3 bearing. One on the hub is honda's proprietary, but it never fails. Other two are the same as front wheel. You can buy them OEM NSK 6204DDU (honda's catalogues claim it is 6204DU, that is correct, but NSK's own partnumber 6204DDU, if you order 6204DU you'll get chinese instead of japanese ones. But the dustseal on bearing will be 6204DU, that is!). Wheel's dust seals can be cleaned and lubed and can continue working for many more miles (but you should check them anyway). It is best to use Liqui Moly Thermoflex Spezialfett - the grease designed to work with rubber/plastic wheel