A light and sturdy wheel tyre system with high end yksion elite tyres and wide and light ism rims newamazing ride quality is how our ksyrium riders most often sum up their experience with this wheel its at ease on any terrain and ready for any adventure you set out on and this year weve made it even better by working on the area that matters mostredesigned rimsthe box section rim extrusion and low spoke count makes for a smooth and comfortable ride and now gets our patented ism inter s