I bought a pair of these AEST CNC 11t jockey wheels to replace my Sram ones after they wore out. On the second ride one of them has virtually ceased up altogether. Are they all this crap or have I just been unlucky?

Recommendations for replacements please? And please don’t say I have to cough up the 80 quid for genuine Sram.

hope?

Just bought some bbb for £8 off wiggle, as Shimano xtr are North of £30. Think they have an sram option. Opened them up and hardly any Grease in them so as suggested will pack more grease in.