SISI splines and square holes are also available at the high end.
Personally, "good" means to achieve a comprehensive balance of light weight, high strength and reasonable price. The advantages of integration are strong integrity, high strength and high stability;
The advantage of hollowing out is to reduce weight and improve structural strength. Hollow refers to the brand of hollow seal of denture crank: Shimano/Giant/Merida /Truvativ/RaceFace.
Mota chi/FSA/pro well/MISSILE/GUESS/SPECIALIZED
The larger gear ratio (size) in the price range is 48+38+28/44+34+24/44+32+22/42+34+24/42+32+22.
Frame size:15/16/17/18/19/20/21inch.
Crank length:165mm/170mm/172.5mm/175mm/180mm.
Mainly according to the height and leg length of the rider, consider the habit frequency (speed type/climbing type) to choose the collocation.