Esos1

Should I replace my largest chain ring in the front? I can't quite tell if they are spiky enough or look like shark fins? I also included a picture of my cassette since I read that that is supposed to wear out faster but it doesn't seem to be? Please let me know if you think I should replace that too. Everything is original to the bike and the bike (2012 Trek Lexa) has maybe 10,000 miles on it? It's hard to say honestly though since I haven't been keeping track of the mileage until recently. TIA!