Although I never thought about it when owning my giant gfm-3, I'm a bit more nervous about the gt carbon 9r that just arrived; mostly rock strikes against the downtube & chainstay wear.
After some research, I decided on Scotch Rubber Mastic Electrical Tape for the chainstay: http://www.amazon.com/dp/B001B1AP3O/ref=pe_175190_21431760_M3T1_ST1_dp_1
& 8-mil thickness ISC Racerstape for the downtube & rear triangle area: http://www.amazon.com/dp/B000TPC7HU/ref=pe_175190_21431760_M3T1_ST1_dp_2
I hear the Shelter film is great as well. Anyone use other options?...
