[Khumalo]

Do you have any reads at all on the SB? How did he get his stack, is he loose, aggro at all, TAGGY, nitty, etc.? This can really help narrow his range.

Is he really check-calling a set on the flop for a rather modest amount with someone behind him on this pretty drawy flop? Again, if he's seemed solid so far, unlikely. If he's passive / donkish possibly. If he's terrible and stupid-tricky more likely.

Second, your bet sizing is a little off, in my opinion. Bet larger on the flop and turn, this charges draws more effectively and helps to define any raises you meet more clearly. Your smallish turn bet (combined with your smallish flop bet) may have convinced your opponent that you have nothing near as strong as top two here, which may in turn have induced him to raise with a wider range than just sets. So it's hard to tell where you are on the turn, and lacking strong reads, I think you have to call and probably call another reasonable bet on a non-club river.