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Bottom Brackets on old Raleigh's question

Old 12-22-09, 01:42 PM
  #1  
take another pu
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Bottom Brackets on old Raleigh's question

part one of the question:
I would like to put a modern BB into my old Raleigh Supercourse (late 70's or maybe an 80 model). looking at Sheldon Brown's site, it seems that these BB's are 26tpi proprietary threads and my only option is Phil Wood. the Phil BB is worth more than the bike.
is there any other option?

part two of the question:
I recently put together a Raleigh Record (mid 70's, cottered crank) and replaced the BB with a UN-54. it was tough to thread in, but it worked. based on what I (and Sheldon Brown) wrote above, have I ruined the threads in the frame by forcing in the UN-54?
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Old 12-22-09, 01:46 PM
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1) Don't know.

2) Probably.
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Old 12-22-09, 01:53 PM
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Don't think of it as ruining the threads, think of it as UPGRADING the threads (but yes, they are probably more or less ruined, not that it really matters, except for restoration purposes).

If it were my bike, and I wasn't planning to restore it to bone stock, I'd have the threads retapped.

"https://www.sheldonbrown.com/raleigh26.html - Re-tapping to B.S.C./ISO
This option is the most versatile, but also the most drastic. Only the top bike shops will have the necessary guided tap set required for this. The threads will not be as strong as they would be if the shell was made for standard threading, but this approach generally works well. You will still need to deal with the overall shell width. A shop that has the correct taps will also have the correct tool to face the ends of the shell, and this tool can be used to bring the width down to a more standard size (though it takes a lot of elbow grease!"


Originally Posted by take another pu View Post
part one of the question:
I would like to put a modern BB into my old Raleigh Supercourse (late 70's or maybe an 80 model). looking at Sheldon Brown's site, it seems that these BB's are 26tpi proprietary threads and my only option is Phil Wood. the Phil BB is worth more than the bike.
is there any other option?

part two of the question:
I recently put together a Raleigh Record (mid 70's, cottered crank) and replaced the BB with a UN-54. it was tough to thread in, but it worked. based on what I (and Sheldon Brown) wrote above, have I ruined the threads in the frame by forcing in the UN-54?
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Old 12-22-09, 02:02 PM
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on the ruined vs. upgraded thing, if I had to replace the BB again, would it accept another 24tpi BB or will the threads be too damaged?

the bike isn't worth the retapping effort. if I wanted to go through that much trouble, I'd get the Phil Wood with the proper cups.
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Old 12-22-09, 02:36 PM
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Have you looked at this:
https://www.velo-orange.com/grcruthbobr.html
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Old 12-22-09, 02:47 PM
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Originally Posted by John Nolan View Post
you know, I did look at these just last night. it was the first time I'd seen one and know nothing about them. seems like a workable solution.
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Old 12-22-09, 05:43 PM
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The seventies Raleigh Super Courses that I've worked on were built in the Carlton factory and had standard BSC bottom bracket threading.
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Old 12-22-09, 05:46 PM
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Originally Posted by take another pu View Post
you know, I did look at these just last night. it was the first time I'd seen one and know nothing about them. seems like a workable solution.
Check your frame first. By the late 70's most Raleigh BB threads were standard English thread.
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Old 12-22-09, 06:10 PM
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Originally Posted by Dirtdrop View Post
The seventies Raleigh Super Courses that I've worked on were built in the Carlton factory and had standard BSC bottom bracket threading.
That's what it says on the retroraleighs site, too. I think there was a recent discussion about this, maybe very early '70's Super Courses had the Raleigh threading, later ones standard English threads, I'm not sure. I would guess that this one from the late '70's or '80 is English threaded, certainly worth checking. I've got two 531 Carlton Raleighs, one from '72 and one from '76, they both have English threading-
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Old 12-22-09, 06:15 PM
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That Velo-Orange BB is champion! That's the route I'd take if I were you.
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Old 12-22-09, 08:52 PM
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Velo-Orange for the win once again.

Get one even if your bike has ISO threading, cause no other bottom bracket has such cool colours.
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Old 12-22-09, 08:56 PM
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Originally Posted by well biked View Post
I've got two 531 Carlton Raleighs, one from '72 and one from '76, they both have English threading-
this nugget of info is helpful. this bike is a Carlton 531, with a 68mm shell.

thank you to everyone for the responses. I am also glad to hear good things about the VO threadless, I'm sure I will need to look into one in the future, if not for this bike.

Last edited by take another pu; 12-23-09 at 08:28 AM.
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Old 12-23-09, 06:05 AM
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Only Nottingham-built Raleighs had the wierd threading.
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Old 12-23-09, 10:15 AM
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Ive recut Raleigh BBs in a few bikes. 20s, RSW, cruiser.

I have done it by screwing in a standard thread BB cup in a little, then back off. It takes ages. Taking the cup right out and cleaning up the shell every now and then. I had a flat faced adjustable cup, with pin holes in it to adjust. I screwed that in all the way. Then cut a sliver of the BB shell off. Then unscrewed the cup so it was flush with the cut face. Then hand filed the shell to the level of the cup. Its a bit more difficult to get the fixed cup faced level. I put the cup in and see where its needing filed down.

Having said all that. The 20 has a tubular BB shell with the chainstays flattened round the outside. Road bikes will have a propper BB shell that has holes for the chainstays. This would be more difficult to narrow much.

My RSW was taken into the bike shop I worked at and I used the BB thread cutting tool and the fork thread cutting tool on it. I think they were Var tools. It didnt take all that long to recut the threads in there

Theres a few companys that make those Threadless cartridge BBs. I had a Giant that had one in it. Think the bearings are a bit small in them
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Old 12-23-09, 10:33 AM
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Originally Posted by Dirtdrop View Post
Only Nottingham-built Raleighs had the wierd threading.
That goes along with what Sheldon says on his Retroraleighs site:

Throughout the Bike Boom era, the Super Course was the least expensive Raleigh model to feature aluminum rims. It was also the least expensive model to use standard British tread dimensions, rather than the Raleigh proprietary threading used on bikes built at the Nottingham factory.
These are quite nice bikes, often suitable for upgrading to modern parts.

The main triangle of the frame was straight-gauge Reynolds 531.
"

But it seems that these Super Course bottom bracket thread questions come up fairly often, and there are folks who report having Super Courses with the Raleigh threading. Early on, were there Super Courses that were made in Nottingham?
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Old 12-23-09, 11:07 AM
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Originally Posted by tellyho View Post
That Velo-Orange BB is champion! That's the route I'd take if I were you.
I've got a nice ally frame somewhere that was ruined when I got it thanks to a broken lockring on the fancy Ti & ally BB... that thing's just the ticket to get it firing!
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