which up grade for my tt bike?

[busdennis]

hi all
i started time trialing at the end of last year just beating 30mins for my 1st ten, got some training miles in over the winter and ive just beaten 24 mins for the first time in an open ten (very pleased i was). i promised my self that if i broke 24mins i would treat my self to some better kit for my bike. the 2 areas im thinking about are either a new bottom bracket and cabon chainset (currently using an old square taper bracket with alloy chainset (chainset being 20 + yrs old)
the second option being a carbon disc wheel (currently on a A530 shimano wheel in vgc)

whats the best upgrade and anybody seen any good deals recently?

 

[Rob3rt]

What is your bike? How good is your position? Assuming your position is somewhat decent. Best time savings per pound spent are probably an aero helmet, skinsuit (preferably a proper TT speedsuit, i.e. very tight and short in the front so when you are tucked, it doesn't crease), shoe covers.

 

[Garz]

What is your bike? How good is your position? Best time savings per pound spent are probably an aero helmet...

This ^ and aero bars as it's hard to guess what you already have.