ProX rear ultralight steel sprocket 07.RS73013 Beta RR 125 200 250 300 350 390 400 430 450 480 498, Xtrainer 250 300

ProX rear ultralight steel sprocket manufactured from premium quality "Qste 420 & 460" high strength steel which offers superior durability.
ProX steel rear sprockets will last 2-3 times longer than aluminium sprockets,made from T7075-T6, at the cost of being more heavyweight.
ProX rear sprocket is available on the following teeth number options: 49, 50, 51