Nukeproof horizon bottom bracketthe horizon bottom bracket from nukeproof is ready to tackle challenging mountain bike mtb terrains'. '.strtoupper('i')ts machined alloy construction is highly durable and boasts an anodised finish, which adds an extra protective layer against corrosion, so you know it's more than capable no matter what the trail throws at you'. '.strtoupper('m')tb bottom bracket with titanium coated bearingsall set for fast paced mountain bike adventures, this bottom bracket is equipped with titanium coated race bearings and stainless steel balls'. '.strtoupper('t')he titanium coating is applied in a vaporised vacuum environment, which allows its structure and density to be fine tuned'. '.strtoupper('a')bec 5 certified and protected against the elements, the nukeproof horizon bottom bracket is an excellent upgrade for riders who want a reliable component on tough mountain bike rides.please note nukeproof is also offering a two year warranty on their bottom brackets including the bearings.click here to view and download our nukeproof technical manual to ensure compatibility.click here to view and download how to fit nukeproof durable unifying bottom bracket dub.installationa 12 notch 46mm od bottom bracket tool is required for installation available herefeaturescup material alloybearing material titanium coated race bearingsball material stainless steelfinish anodiseduse mtbcompatibility sram dub cranksthread bsa 1.37x24 tpicertification abec 5manufacturer part numbersblack 68 73mm nukbb29bsa tsbbblue 68 73mm nukbb29bsa tsbbblucopper 68 73mm nukbb29bsa tsbbcopgrey 68 73mm nukbb29bsa tsbbgrypurple 68 73mm nukbb29bsa tsbbpurred 68 73mm nukbb29bsa tsbbredbuy nukeproof components from chain reaction cycles, the world's largest online bike store.