Aero bikes goods yan sa flat races cons nyan medyo may kabigatan sa weight..
Climbing bikes goods yan for climb as the name suggest.. Light weight.. At pwede mo din pang all-rounder..
When it comes sa riding comfort.. It comes sa proper fitting ng bike sa'yo lods kaya kung mapapansin mo may sizing ang bike.. Tsaka kung mapapansin mo din uso ang bike fitting, para makuha mo comfort at mamaximize riding caps ng isang rider.
Sa brands naman it depends sayo kung carbon ba alu o alloy or mix carbon alu.
May mga brands likes twitter, mountainpeak, pardus, eleves (quendi, avari) or kung makascout ka ng mga branded like giant, merida and the likes na second hand.
Hope this helps..