TNT Performance makes what are probably the lightest B/Bs ever. The Ultimate ATB is a "floating" type using a Titanium spindle. The spindle is machined from Ti 6Al-4V Titanium rod with tapered ends for easy crank installation. Each bearing rests on a 17mm diameter section of the spindle, with the area between both bearings turned on the lathe to a smaller diameter to reduce weight. The spindle is drilled through with threads tapped inside the ends for the crank bolts. The bearing cups are machined from 7075-T6 aluminum rod. The lathe process shapes and cuts the rough cup, leaving an outer flange that tightens against the B/B shell and closes the shell off from the outer environment. A hole is drilled from the outer face leaving an inner lip for the bearings to rest against. The bearings are pressed into the cup from the outer side. Four equidistant holes are drilled into the flange for the final pin spanner positioning, then the cups are threaded for the B/B shell. The TNT B/B uses aluminum locking collars to hold the spindle in position. Once you've positioned the spindle, these collars slide down the spindle and two allen head set screws cinch down and hold the spindle firmly in place. To cap it all off, TNT includes some wickedly fine, machined aluminum crank bolts. Exquisitely made from 7075-T6 aluminum rod, these are one piece bolts with the washer machined into the bolt. A perfect choice of material for use in the Titanium spindle, because they are light and won't seize on installation. The crank bolts weigh just 10.5 grams a pair, and are available separately. It is recommended that you tighten the cranks onto the spindle with steel bolts, remove them and then use the aluminum to hold them onto the spindle. The TNT Ultimate B/B comes with either a 120mm, 125mm, 130mm, or 135mm spindle. The weight of the Ultimate ,with a 125mm spindle and the crank bolts, is 156 grams. Wild! Made in Silver with English threads only. This version of their B/B has been discontinued.
No longer made, we sold this for $149.99
TNT Performance makes what are probably the lightest B/Bs ever. The Ultimate ATB is a "floating" type using a Titanium spindle. The spindle is machined from Ti 6Al-4V Titanium rod with tapered ends for easy crank installation. Each bearing rests on a 17mm diameter section of the spindle, with the area between both bearings turned on the lathe to a smaller diameter to reduce weight. The spindle is drilled through with threads tapped inside the ends for the crank bolts. The bearing cups are machined from 7075-T6 aluminum rod. The lathe process shapes and cuts the rough cup, leaving an outer flange that tightens against the B/B shell and closes the shell off from the outer environment. A hole is drilled from the outer face leaving an inner lip for the bearings to rest against. The bearings are pressed into the cup from the outer side. Four equidistant holes are drilled into the flange for the final pin spanner positioning, then the cups are threaded for the B/B shell. The TNT B/B uses aluminum locking collars to hold the spindle in position. Once you've positioned the spindle, these collars slide down the spindle and two allen head set screws cinch down and hold the spindle firmly in place. To cap it all off, TNT includes some wickedly fine, machined aluminum crank bolts. Exquisitely made from 7075-T6 aluminum rod, these are one piece bolts with the washer machined into the bolt. A perfect choice of material for use in the Titanium spindle, because they are light and won't seize on installation. The crank bolts weigh just 10.5 grams a pair, and are available separately. It is recommended that you tighten the cranks onto the spindle with steel bolts, remove them and then use the aluminum to hold them onto the spindle. The TNT Ultimate B/B comes with either a 120mm, 125mm, 130mm, or 135mm spindle. The weight of the Ultimate ,with a 125mm spindle and the crank bolts, is 156 grams. Wild! Made in Silver with English threads only. This version of their B/B has been discontinued.
No longer made, we sold this for $149.99
