Vista Silver Shadow Bottom Bracket
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Vista Silver Shadow Bottom Bracket
I'm trying to take my old frame from my Silver Shadow that I love and reuse the frame still in great shape. The bottom where the bottom bracket goes doesn't have threads. What kind of bottom bracket should I be looking for for this frame?
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Hm, odd. Do you know how the original bottom bracket was secured in place? Or don't you have original parts?
The frame looks decent quality, from information I can gather, so likely worth saving as you say.
There were a number of threadless bottom bracket systems floating around the market in the '70s and '80s, many of which employed standard diameter shells. These can often be tapped with the appropriate threading and used with a normal bottom bracket. The problem is, while many bike shops will have taps, some won't want to use them to cut new threads in a completely unthreaded bottom bracket because of the wear on their tooling. A framebuilder could also do this for you.
Another alternative is the Velo-Orange threadless bottom bracket, linked here. You should measure the shell diameter to make sure it will fit, before you commit any money, because they are a good bit more expensive than other bottom brackets of comparable quality.
That said, if you live close by the Boston area, I have a set of cheap taps and I could try to do it for you.
The frame looks decent quality, from information I can gather, so likely worth saving as you say.
There were a number of threadless bottom bracket systems floating around the market in the '70s and '80s, many of which employed standard diameter shells. These can often be tapped with the appropriate threading and used with a normal bottom bracket. The problem is, while many bike shops will have taps, some won't want to use them to cut new threads in a completely unthreaded bottom bracket because of the wear on their tooling. A framebuilder could also do this for you.
Another alternative is the Velo-Orange threadless bottom bracket, linked here. You should measure the shell diameter to make sure it will fit, before you commit any money, because they are a good bit more expensive than other bottom brackets of comparable quality.
That said, if you live close by the Boston area, I have a set of cheap taps and I could try to do it for you.
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Owner & co-founder, Cycles René Hubris. Unfortunately attaching questionable braze-ons to perfectly good frames since about 2015. With style.
Owner & co-founder, Cycles René Hubris. Unfortunately attaching questionable braze-ons to perfectly good frames since about 2015. With style.
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Could be an Ashtabula-style crankset?
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Could be an Ashtabula-style crankset?
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Owner & co-founder, Cycles René Hubris. Unfortunately attaching questionable braze-ons to perfectly good frames since about 2015. With style.
Owner & co-founder, Cycles René Hubris. Unfortunately attaching questionable braze-ons to perfectly good frames since about 2015. With style.
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I think they use the Shimano Altus/Selecta BB
https://www.bikeforums.net/classic-v...s-selecta.html
https://www.bikeforums.net/classic-v...s-selecta.html
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