IRD QB-55 Bottom Bracket
Width: 68mm BB width
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.
– Steel cups, aluminum sleeve
– English Threads
– Sealed cartridge bearings
– JIS square taper
– CrMo spindle
– Made in Japan
If you plan to swap in IRD Italian/French conversion cups, it is more economical to buy the QB-55, than the QB-75.