Try M & P for sport demons I bought some for mine not long ago for a good price. Tyre choice for the 16 is rubbish I looked at everything, I think sport demons are the best on offer. Ive never seen bt 45's but my local bike shop told me they were not as sporty as the pirreli's, pirreli also do the mt75 for small sports bikes,might be worth a look. Let us know if you find anything better.