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Home bicycle mechanics Facebook group
...or why I don't want to run a bike shop ever. I occasionally chip in some advice where I can, but honestly...
There's some good FB groups like Steel is Real that have an international perspective, or that specialise in your make of bike. Vanity Cycling gives you some shiney things to ogle - I only get it for the articles.
Coning up, "I understand this is called a bottom bracket..." and "can I fit the latest Ultrgra group set to this bottom of the range 1989s Raleigh?"
If you're new please join in and if you have questions pop them below and the forum regulars will answer as best we can.
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I don't think the groupset question is as silly as it sounds - a bike builder or decent bike shop could cold-set a steel frame to make the rear dropouts up to 130mm, and then with a correctly dished and hubbed rear wheel, could take an 11 speed groupset.
You see this kind of thing on the GCN Tech show "Nice or Supernice" feature, in the car world it's known as a "restomod". People want the aesthetic and feel of a bike they really wanted as a kid, or find desirable, but then also want it rideable (modern ratios) and stoppable (modern brakes).
I have a 1985 La Vie Claire Hinault 753R, which I restored with period-correct Campagnolo kit. It's authentic so I can take it so Eroica but with the hills round where I live (Dorset) it's not the most rideable bike ever, 53/42 - 14/24 gearing, 80s era brakes. If it wasn't for the fact I wanted and needed an authentic restore, I would have happily gone with modern Campag. In fact if my next project happens, I'm looking for a similar era Raleigh Panasonic Team frame, and I'm very tempted to fit modern Shimano kit.
How would the cranks fit though ?
Would the frame not just be BSA threaded?
Dunno ! It was just the first thing I wondered as weren't they cottered cranks back then ?
Still the same size and threads for the bearings though, during lockdown I rebuilt a 1970's Le Jeune tandem that had cottered cranks with modern Shimano tiagra.
No, sadly. Raleigh used a proprietary 26tpi thread, so you can't use standard BSA 24tpi bottom brackets. You have to recut the thread to 24tpi, but it may well strip when you torque your new bb up to 40Nm.
It used to be possible to fit a square taper Shimano UN72 bottom bracket, which simply slipped through and had a threaded ring on one end, but they're no longer made. See this discussion: https://www.bikeforums.net/folding-bikes/276390-raleigh-twenty-bottom-br...
A favourite build of mine is my 1984 Raleigh Record Ace - the frame, brown cable housings, paint, decals and gold ESGEs are correct; the handlebars and levers aren't too far off, but the wheels and drivetrain are 3x10s.
Raleigh Ace 5 speed
Bottom bracket query.