If there is 4-betting or 5-betting going on I can almost assure it is Aces or Kings. And at minimum AK or QQ. In 6 ring max A10 is always worth a 3bb call from the SB. If there is a re-raise from the BB then it is a easy fold. I would suggest not re-raising.
Here is why, if you re-raise you give your opponent the chance to 5-bet in which case you now have to fold with out seeing the flop. (Depending on what kind of player you are)
If you re-raise, it is a likely chance your opponent is still going to call since he already has pot odds
(depending on raise amount) in which case you now will most likely have to make a continuation bet.
If you call it is 1 in 3 you hit the flop. If you miss your only out a 2.5BB.
Always go for the safer option is the way I look at it. And be very careful if you did make an Ace on the flop. A10 is not a good hand I hate to say it. It's kicker is way to weak. That is just my opinion.