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Retrofit your IRD QB-55, QB-75 or QB-95 bottom bracket with these cups to make it compatible with non-English threaded frames.

Simply pull of the stock English cups and replace with these.

For IRD bottom brackets only.

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Questions & Answers (1)
Do You Do A Right Handed English Bb Conversion
By
01 Aug 2016
I have a "made in Germany" old mixtie frame with what appears to be right handed threads both sides. I have a sealed unit of 1.37 x 24tpi type which fits on the non driven side. As the standard is a left handed thread on the driven side it will not fit so I need either to find a sealed unit with both sides using what I think is english right handed, this appears impossible, or if you do threaded replacement for the driven side which can replace the left hand side of the BB I have. Any help would be appreciated.
SJS Customer Service:
Hi,

Although these IRD cups in the French option is the correct thread for your frame, as they are designed for use with IRD bottom brackets I don't know how well they'd work with other manufacturers of bottom bracket I'm afraid. For an unusual frame we normally recommend threadless bottom brackets that are normally designed for damaged threads.

Thanks.