Sports/Trail Hardtail - 600 Series - 120mm. Our Compact MTBs feature shorter geometry and components to better fit a smaller rider. The 604 may be our entry level model, but with carefully chosen parts and an exceptional frame it remains distinctly Whyte.. Whyte's design team have given the brand new 600 series frame the 'Trail' treatment. A 120mm fork, wider 740mm bar, shorter stem, wider grippier tyres and even our Enduro developed V-grips, make these the most trail-ready bikes in this price category.. The new frame bristles with UK design features such as the "Get A Grip" seat post clamp system. This allows quick adjustment, fantastic weather proofing and a nice ergonomic lever which is easy to operate however cold your hands might be.