sunrace trapas o38 136mm inslagcups met spieA ball bearing bottom bracket from Sunrace. This bottom bracket is suitable for gravel, city bikes, e bikes, MTBs, and road bikes. The bottom bracket has a diameter of 38 mm and a length of 136 mm. The bottom bracket has a keyway and is black. Brand: Sunrace Type: gravel, city, e bike, MTB, race Diameter: 38 mm Length: 136 mm Fitting: with wedge, 38 mm Color: black