We had a Fixed Gear only Team TT last week in LA, and as far as gearing goes i don't think any one exceeded 82 Gi, I mean it is an unsanctioned race and you are riding in the street brakeless im sure everyone esle will be using street gearing as well(unless you all have some massive legs). 49/15 seems way to high tbh. Then again i've never ridden in tx so i have no idea how traffic/streets are out there .