Which is it? Dave at Whizzer told me that grease seeping into/onto the hub likely caused my problem I was having. (Brake "slipping" and not engaging) He said that if a rider rests his feet on the pedals, even very lightly, results in friction caused heat melting the grease, allowing it to run into the hub. I never ride this way, so the previous owner may have done that in his 120 miles on it. The brake parts are fine after cleaning, no galling or scoring. And the rear wheel came off in 3 minutes despite the dire warnings I've seen regarding sharp edges and other challenges.