I have experienced the same problem on a steep hill on my property. Even with a 54 tooth I still spun the rear and lost forward momentum at the very top. The only solution I can see is get a running start so the momentum is enough to clear the crest or have a helper push you to the top. It's a very dangerous job trying to get the bike turned around on a hill since the front brake will not hold the bike on the hill and you can't get your foot onto the rear brake. Gravity and physics can be a little too much in these situations. My hill climbing dreams were crushed when I realized my TW could not take hills the same as my 4x4 SUV. Also, I was never able to get the bike the last few feet up the hill even by putting it in gear and walking up beside it- no go. Do not pass GO. Do not collect $200.