Hmmmm. 16"?? That's kind of tiny... wondering if the 11T would help all that much. Sounds like a chainwheel upgrade to raise the overall gearing. I have a 20" wheel folder and I have read where others are unhappy with the gearing and ride around in top gear all the time but honestly I use every single gear on mine and wish it had more. I can spin out top gear running downhill but I appreciate having as low a gear as I do for the occasional hills. It might be time to visit Craigs again and look for a more suitable bike for riding in mixed company. FWIW.

H