Shimano 105 fc5750 10 speed compact chainringsthe new 5750 has a slim body line and super smooth rotation combined with superior shifting performance to power you effortlessly along featureschainring design improves pick up and shifting performancehollow forged aluminium arms keep weight lowanodised chainring50 34t chainringcompatible with 7900 dura ace and 6700 ultegra systemsa 2 year warranty is offered with all shimano products from chain reaction cycles 3 years on dura ace and xtr product