Ed and I already discussed this not that long ago. if your tt is too long, there is nothing you can do to adjust it, if the tt is too short, you use a longer stem. It affects your riding position. seat tube on the other hand, doesn't really affect how you ride your bike, as long as you can still get on and off your bike freely, I think.
Ed and I already discussed this not that long ago. if your tt is too long, there is nothing you can do to adjust it, if the tt is too short, you use a longer stem. It affects your riding position. seat tube on the other hand, doesn't really affect how you ride your bike, as long as you can still get on and off your bike freely, I think.