With your 177k this is 177 kilobytes per second. You take 177 times 1024(number of bytes in a bit) times 8 (number of bits in a byte) and you get 1449984 bits per second. Now a 10mbps is 10 million bits per second. So you will be fine with a 10mbps card.

The only thing you may notice however, is some packet collision. This is because a 10-T hub shares all the ports up to a max of 10Mbit. What this will cause is an occasional or even not so occasional sputter and/or slowness when connecting to some sites or even checking you email. It's not usually a bit deal as you can see that halving your bandwidth on the hub by 2 will give each machine 5Mbit to work with, still plenty of overhead to work with
 
Be sure to keep the patch cable lengths to a minimum as this can add to further packet loss and slowdowns of course

thanks both, you're stars!