I really miss pedaling when riding near top speed. I've already increased my front crank size from 48 to 52T and still am not able to pedal at higher speeds so I thought I'd try increasing the crank size one more time. I picked up this 56T crank from eBay and paid $22 shipped which seems like a fair price. It's CNC machined right here in the USA. Here's a photo of the crank compared to my current Tiagra 52T crank. It's quite a bit larger. If this doesn't work, I'll need to go up to the highest size, which is 60T!
The 56 tooth crank is the aluminum one hanging on the bike.