Shimano alivio t4060 9 speed triple chainsetshimano triple speed mtb chainset please note bottom bracket is not included featuresmaterial aluminiumsteel speed 9 intended use mtb chain line 50mm bcd 10464mm approx weight 1096ga 2 year warranty is offered with all shimano products from chain reaction cycles 3 years on dura ace and xtr products buyshimano componentsfrom chain reaction cycles the worlds largest online bike store