I’m digging these ultra-low profile Zero MTB pedals from Tioga. I get frequent pedal to rock/root strikes on my Santa Cruz Nomad so these would make a nice upgrade. As a comparision these pedals are 4-7mm thick while the NRG low profile pedals on my Nomad at 17-18mm thick. They look dead easy to service as well and the sub-$100 cost puts them in a competitive price range to the other options I’d consider.
They work with all standard MTB cranks so retro-fitting is no problem. No spindle – just a huge inboard bearing. You can watch a product video from Tioga here.