Takze som trochu postudoval tie skratky, nasiel toto a snad to niekomu pomoze:
ZZ - Double sided metal shield - This is the most common type of shield. Offers good protection against particles while allowing maximum rotation speeds and creating minimum drag.
LLB (2RU) - Double sided non-contact rubber seal - This is a great type of seal that offers better protection against particles than the ZZ shielded Bearings while having lesser impact on the speed and drag than the LLU types.
LLU (2RS) - Double sided contact rubber seal - This is the best kind of seal and the most ideal for protecting against dust and foreign particles.
LBLU - One side non-contact, one side contact rubber seal - With this special bearing shield, you can have the best LU protection on the exposed side while having less drag than a full LLU bearing.
Originalne tam mam LBLU, takze z jednej strany chranene a z vnutornej nizsi odpor.
Ale v principe som z toho magor - najlacnejsie stoji 90 centov za kus, najdrahsie 25€... SKF co je pre mna znacka kvality za 12.
Uvazujem na niecom strednom, ako napriklad
toto na 2,09 libry.