The Endurance SL range is a family of lightweight road bikes that are designed for endurance riding or racing, leisure rides and even fast commutes. The range consists of the flagship Endurance SL R Series which is the lightest production bike that we have ever produced and the Endurance SL. Both frames are produced from the same premium grade Toray T800 and T1000 fibres but the SLR employs more of the T1000. This allows the frame to be made ever slightly lighter with the same strength to weight ratio. The Endurance SL bike range has a geometry that offers the best balance of stability, comfort and precision handling with enough adjustability to offer the rider the choice of a slightly more relaxed position or a more performance optimised race position. They offer mile eating comfort whilst also offering the rider a race-like performance One of the most noticeable design features across the range is the dropped seat stays which help to increase the compliance of the bike. These dropped stays help to dissipate the vibration transmitted through the frame to increase rider comfort and reduce fatigue. Each bike in the range also has discreet mudguard mounts for all-weather capability and is available with a choice of disc brakes or rim brakes. With each bike you can order our recommended specification or enter into our BikeBuilder function which allows you to fully customise the bike to suit your personal preferences.