Argon Fit System

Size-specific geometries to provide optimal performance and positioning for all riders

Argon 18's fit system offers size-specific geometries to provide optimal performance and positioning for all sizes, guaranteeing no rider left behind.

Our smallest bike frames offer the same ride feel as our largest frames. In fact, our XL frames have exceptional stiffness without excess weight, to avoid the 'dead' feel found in some larger frames. XS and XXS retain their inherent lightweight qualities, but without excess stiffness, avoiding harsh ride quality.


BB drop, chainstay length, and wheelbase are extensively adapted for each size, providing optimized handling for every frame.

More than one fork to match frame sizing

For every model, 2 fork sizes are developed (1 fork for smaller sizes and 1 fork for larger sizes) to assure balanced handling and avoid toe overlap. Steerer angle, fork length, and fork rake are optimized to assure the best fork trail angle and handling for every size.

Wide fit window & stack and reach

We offer sizing from XXS to XL in all of our road bikes, and XS to XL in our Tri bikes with each size approached individually from a design and performance perspective.