Gravel bikes are some of, if not the most versatile bikes on the market. Fast and efficient enough for a road century, capable enough to tackle cross country mtb routes and muddy bridleways, and as you would expect fast and comfortable on gravel tracks and fire roads. The ultimate go anywhere bike, some would say.In an effort to maximise this versatility many will decide to run two wheelsets. This makes a lot of sense as most framesets now accommodate different wheel sizes with a wide range of the many tyre sizes available.So, what's the ultimate double wheelset setup? What are the advantages and the drawbacks of the many combinations available. I cannot answer these questions for you, as there are just two many variables and personal preference will play a large part. What I can do though is pull together