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. (If you require a 68mm English cup set, order the 73mm and pry out the spacers inside the cups.)
*Some mountain bikes have "oversized" bottom brackets shell width of 73 mm, rather than the standard 68 mm.