I have been considering making a foray into road bikes and ended up picking up a pretty pristine Giant TCR advanced 2016 bike for a bargain. I bought a size M and ended up figuring out that I actually needed a size M/L.
https://bikeinsights.com/compare?geometries=5d1434e58f568e0017f135bc,5d1434e58f568e0017f135bd, (scroll down to see comparison)
I couldn't figure out as I am used to steel tourers and more into commuting until now. I have the seatpost set to almost the cutoff height. I still feel that it should be 15~20mm larger for me to be at my most efficient.
I looked up the seatpost, it seems like a proprietary product.
The standard length seems to be 375mm. I figured out that if I get a 400mm seatpost, it'd be good enough for me, and I should be able to ride just fine. However, I am not able to find the seatpost, they seem to be out of stock, since the newer version has a different seatpost.
Are there any aftermarket brands (even from aliexpress) which would be a suitable replacement? Is there anything else that I can do to increase the height,like a different saddle for example. Or is this a lost cause?
Is there anything else that I can do such as changing the stem, to make the bike fit me better ?