While it’s commonly perceived that Race Bikes, often referred to as aero bikes, sport a geometry that’s longer and lower compared to endurance bikes, this isn’t the definitive rule. The distinctions between various bike types extend far beyond mere fit. Factors such as wheelbase, trail, frame material, and its inherent properties like stiffness and compliance, alongside wheel clearance and the selection of wheels and tires, all play crucial roles.
To truly determine the ideal bike type, consider the nature of your riding. Once you’ve clarified your riding style, leverage your fit measurements. If you’re unsure about your fit or need assistance in translating measurements from your current bike, consulting a professional fitter or a knowledgeable local bike shop is advisable. This step is crucial to identify bike models and sizes within your preferred category that align well with your riding position.
For example, individuals with shorter legs and a longer torso often adopt a stretched and low riding posture. Interestingly, my riding position remains consistent across both my aero and endurance bikes, maintaining the same spatial relationship between the saddle, hoods, and bottom bracket. I utilize only one spacer on each bike—a 10mm spacer on the aero bike and a 5mm on the endurance model. This is because, given my fit, I opted for an endurance bike with a relatively low stack height.
However, to achieve more relaxed handling on my endurance bike, I incorporate a 10mm longer stem, 20mm wider handlebars, and bars with a slight sweepback from the stem clamp. These modifications, coupled with a slightly slacker head angle and an extended wheelbase, contribute to a more stable and less aggressive ride. Furthermore, I choose 30mm tires for the endurance bike, contrasting with the 25mm tires on my aero bike, and also opt for shallower rim depths. Adding to the differentiation, my endurance bike is constructed from titanium, while my aero bike boasts a carbon frame. Collectively, these elements result in bikes that feel and handle distinctly differently, despite sharing an identical riding position and a minimal 5mm spacer difference.
