Are you considering a Trek mountain bike, but can’t decide between the popular Top Fuel and Fuel Ex models? Look no further! We’ve compared these two bikes across multiple specifications, set up some rides so you can experience them in action and concluded our verdict on the better bike. Read on to delve deep into how both Trek bicycles measure up against each other and decide which one will best meet your needs. From cross country racing to downhill descents, here's all you need to know about the incredible Top Fuel vs Fuel Ex!