Quad Bottom Brackets

IRD_BB_quad_alloy700.jpg
IRD_BB_quad_alloy700.jpg

Quad Bottom Brackets

79.99

Why introduce JIS square taper designs when every maker is moving away from them?

Because there are still many loyal fans who trust the square design, know how to maximize the square design, and have square taper cranks in their garages. All the squares out now are mostly cheap stuff you wouldn't dream of using on your 1995 Dura-Ace crank. IRD to the rescue. Made with Japanese quality by Tange Seiki.

  • QB-75 has alloy cups and body with a plated CrMo spindle (avg. wt. 235g)
  • QB-55 is our more affordable model with steel cups, alloy body, but it still has a plated CrMo spindle
  • Italian, French and Swiss threaded replacement cups available(aluminum)
  • Sealed cartridge bearings
  • Made in Japan by Tange Seiki
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