If I remove the contact between my wheel and trainer drum, and let it spin loose, can I zero the torque on my PT inside by "coasting" on the trainer. I usually zero outside by coasting, so is a zero torque on a trainer accurate? I just had a battery change on my CPU and I think it is reading a bit high. . . either that or I picked up around 18 watts on my FTP after having my bike in the LBS for a few days while I rode my fixed gear and did intervals on a PE scale. I will probably not be able to get outside between trainer sessions this week. I'm just wondering if the torque reading would be accurate since there would literally be no weight on the wheel if the bike is clamped on the trainer. Probably a stupid question, but I'm wondering if anybody has a good reliable way to zero out their torque inside, or it is the same process as outdoors?