Browsing Bottom Brackets from Interloc Racing Design

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Interloc Retrofit Bottom Bracket Cups
Margin Booster
  • High quality alloy cups compatible with IRD QB55 bottom brackets (sold separately)
  • Choose 73mm, Swiss, French, or Italian bottom bracket thread dimensions (left = non-drive, right = drive side)
item # model thread left cup right cup shell width in stock?
  RD4198 Swiss 35mm x 25.4tpi right hand thread left hand thread 68mm YES
  RD4196 French 35mm x 25.4tpi right hand thread right hand thread 68mm YES