hello everyone, first forum i have joined. i have been researching but need more info to rate my rides. first off i have diamondback interval 18 speed sitting on a tripod trainer (magnetic resistance) only have 71 rides on it since december but according to my calculations i have average rpm 115 trying to achieve between 22-23 miles in an hour, my resistance only at 2 but riding in 15th and 16th gears. right now it is kicking my ass by the end of the hour. can anyone advise me where i'm at on some kind of grade scale so i know where i'm at. thanks