IRD Bottom Bracket Conversion Cups Pair
Note: Only items that are in stock can be added
to cart. Please call us at 800-245-9959 to get
inventory update or to place on backorder.
Conversion cups for IRD Quad or Defiant bottom brackets.
French, Swiss, Italian, or 73mm OS* English BB threading.
*Some mountain bikes have "oversized" bottom brackets shell width of 73 mm, rather than the standard 68 mm.