While I was in Antarctica, I was working in the Dry Valleys about 100 miles from McMurdo, the British and the Norwegians were having a Cross Country ski race to the South Pole. Talking to the locals they said that they didn't use the ice road. After flying over the Polar Plateau I noticed that it is totally bikeable, and all you would need is some studded tires. I would only worry about crevasses but it is totally doable. I got the chance to do some cross-country skiing on part of the ice road to the south pole and it wouldn't be to bad to ride it. Also in the summer the sun never sets so you don't need any lights!