adj. BB to cartridge

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I have a shimano 7nl spindle.Is there a cartridge that I can convert to?

Sounds like a really long one. Can you measure the length, (without the threads).

Sounds like a really long one. Can you measure the length, (without the threads).spindle length 122mm.

What is the bike? A shimano UN26 or any sealed Bottom Bracket (TH, YST) of 122mm should fit ok.

What is the bike? A shimano UN26 or any sealed Bottom Bracket (TH, YST) of 122mm should fit ok.specialized stumpjumper not sure what year