Originally Posted by
burnthesheep
I swear I'd expect to be faster than this.
I'm just really starting to dig into TT'ing, so take my advice for what it's worth. The elevation can make a difference, but I've found that power can be highly variable depending on the course, but unless there is a ton of elevation, speed should be close. That would lead me to suggest looking into your position. If you have pictures of your old position, see if you can spot any difference. You could easily be catching wind somewhere. For reference, I did 4 TT's last year and the power was all over the place but the speed was fairly close. They looked like this:
11k, 289w ave, 262 ft elv, 26.1 mph
40k, 257w ave, 30 ft elv, 26.4 mph
14k, 311w ave, 72 ft elv, 27.6 mph
40k, 259 w ave, 30 ft elv, 26.6 mph