TT position query

[lugster77]

1 for you time trial/tri experts,
basically i've entered a 1/2 iron and a full iron tri and have put tri bars on my road bike, also turned seatpost round to steepen the angles etc. question is do i need to change saddle height? had a little trial today and was really burning my thighs (lots more than normal) is it just a case of getting used to the new position or is it worth mucking about with saddle height?
all advice gratefully received!
cheers
andy

[Rob]

is it worth mucking about with saddle height?

Sounds like you already have been! You've got three contact points (saddle, arm rests, pedals) which form a triangle. While you can rotate this forward to drop your nose cone, you've got to keep the sides of the triangle in proportion.

Don't know much about Tri, but would have thought you need to maintain some comfort levels given the amount of time you'll be working - so wouldn't do anything too radical.

[PhilBixby]

Small differences in saddle height can have a big impact. I've used my Cervelo for TT's by fitting aerobars and flipping the seatpost but the seatpost (and bike geometry) are designed for it. In theory, flipping the seatpost should just rotate you forwards around the bottom bracket, so your upper body is tilted forwards and downwards but your legs are in the same position relative to pedals/bb. If it feels wrong, it's probably just to do with the seatpost clamp arrangements throwing the effective seat height out by a few mill. See if you can work out which way it's gone and adjust accordingly, but as Rob suggests, make any adjustments small....