So I did some research and decided to give the Bridgestone M404 tires a try. I have been running 120/90 tires and when I placed my order from my phone I was in a hurry and accidentally ordered 100/90. I did not realize my mistake until they got to my house yesterday. My biggest problem is that I have a race this weekend and the weekend after so I need some fresh tires. So i was wondering if I should just go to a local place and buy the larger size or if the narrower tire will not make that big of a difference. I will say that I have ran 110/90 and I liked them but I have never had a 100/90. I tried searching but only found information on the differences of the 120 compared to 110s. Any help advice would help before I install these tires as we all know they are not cheap and I dont want to put them on and realize that they are to small and suck.