1971 Raleigh Supercourse--Seatpost Size?
09-21-06, 12:28 PM
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1971 Raleigh Supercourse--Seatpost Size?
I have a 1971 Supercourse that I am in the process of upgrading and restoring. I need a seatpost that fits and am coming up empty-handed.
I looked on Sheldon Brown's site but the diameter he lists on his seatpost size chart is not compatable with my Supercourse.
Does anyone here know what size post this frame accepts? I currently have a 25.8 in use (with shim) but would like to get the correct size. Any help is appreciated!
Frame is 531 straight-guage/hi tensile tubing with Nervex lugs.
I looked on Sheldon Brown's site but the diameter he lists on his seatpost size chart is not compatable with my Supercourse.
Does anyone here know what size post this frame accepts? I currently have a 25.8 in use (with shim) but would like to get the correct size. Any help is appreciated!
Frame is 531 straight-guage/hi tensile tubing with Nervex lugs.
09-21-06, 12:44 PM
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I converted exactly the same bike (in green) to a fixed gear and replaced the seatpost. I'm pretty sure it's a straight-up, common 1" post. What I did was take it to my favorite LBS (Proteus, if you're still in the DC area), which has a lot of seatposts lying about until I found one that I liked that fit. I did find that the seat collar was a bit wonky, maybe not quite round, maybe bent a bit and the seatposts were hard to get in (and out), so working a bit of mojo to get it in is not out of the question.
College Park bikes was selling a '71 supercourse a while back, they might know the technically correct measurement.
If you're *really* keen on the exact seatpost OD, I can dig up the original and measure it with calipers.
College Park bikes was selling a '71 supercourse a while back, they might know the technically correct measurement.
If you're *really* keen on the exact seatpost OD, I can dig up the original and measure it with calipers.
09-21-06, 01:09 PM
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Originally Posted by comradehoser
I converted exactly the same bike (in green) to a fixed gear and replaced the seatpost. I'm pretty sure it's a straight-up, common 1" post. What I did was take it to my favorite LBS (Proteus, if you're still in the DC area), which has a lot of seatposts lying about until I found one that I liked that fit. I did find that the seat collar was a bit wonky, maybe not quite round, maybe bent a bit and the seatposts were hard to get in (and out), so working a bit of mojo to get it in is not out of the question.
College Park bikes was selling a '71 supercourse a while back, they might know the technically correct measurement.
If you're *really* keen on the exact seatpost OD, I can dig up the original and measure it with calipers.
College Park bikes was selling a '71 supercourse a while back, they might know the technically correct measurement.
If you're *really* keen on the exact seatpost OD, I can dig up the original and measure it with calipers.
I also noticed that the seat collar is a bit weird. I can't find a seat-binder bolt that fits either, so I've rigged that up with a standard sugino binder-bolt and some washers. Strange design.
Thanks for the info.
Last edited by H20.1; 09-21-06 at 01:15 PM.
09-21-06, 02:59 PM
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my seat-collar takes the usual raleigh nut and bolt. If you're in DC, I seem to recall seeing one floating around the parts bins at Proteus.
09-21-06, 05:31 PM
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The supercourse used a 26.4. I have a couple in both the original steel and Raleigh branded SR alloy from later years. Let me know if interested. I'll be offline on Friday.
09-21-06, 05:59 PM
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hmm... I have a 1981 Carlton Super Course, that I have all the parts for except the seat post... it looks like a 27.0, but my ruler is a piece of crap and I think I loaned my calipers to a friend... It is also straight gauge, I think, but the then-new 531c tubing.
anybody know?
anybody know?
09-21-06, 06:12 PM
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The seat post on my '71 Super Course measures 26mm. I was able to find an alloy LaPrade style to replace the original steel jobber.
The '77 Super Course that I recently sold had a 26.4mm post, so sizes do indeed vary according to build date.
Neal
The '77 Super Course that I recently sold had a 26.4mm post, so sizes do indeed vary according to build date.
Neal
09-21-06, 07:41 PM
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Hmmm - '77 and '78 are spec'd at 26.8. I'm pretty sure they had 26.4 up until then.
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09-21-06, 09:19 PM
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Originally Posted by USAZorro
Hmmm - '77 and '78 are spec'd at 26.8. I'm pretty sure they had 26.4 up until then.
Neal
09-21-06, 09:39 PM
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can't find the old seatpost--
the new one (sakae) measures 1"1/32 (sorry no metric calipers)
the new one (sakae) measures 1"1/32 (sorry no metric calipers)
09-22-06, 06:36 AM
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My early 70's Japanese Raleigh America Super Course uses 26.4. They come up on eBay from time to time with the straight up one working the best for me with an Ideale seat.
09-22-06, 08:25 AM
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My Super Course MK II uses a 26.2 just like Sheldon's chart shows. Why does the MK II have thicker tubes than an ordinary Super Course?
09-22-06, 08:58 AM
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Originally Posted by nlerner
I'm sure you're right, John. The memory is getting faulty with age (and from parenting two small kids!).
Neal
Neal
Wait until you have teenagers. You're still a young buck. 
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09-22-06, 09:02 AM
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My Super Course MK II uses a 26.2 just like Sheldon's chart shows. Why does the MK II have thicker tubes than an ordinary Super Course?
02-20-22, 03:24 PM
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I have a 1971 Supercourse that I am in the process of upgrading and restoring. I need a seatpost that fits and am coming up empty-handed.
I looked on Sheldon Brown's site but the diameter he lists on his seatpost size chart is not compatable with my Supercourse.
Does anyone here know what size post this frame accepts? I currently have a 25.8 in use (with shim) but would like to get the correct size. Any help is appreciated!
Frame is 531 straight-guage/hi tensile tubing with Nervex lugs.
I looked on Sheldon Brown's site but the diameter he lists on his seatpost size chart is not compatable with my Supercourse.
Does anyone here know what size post this frame accepts? I currently have a 25.8 in use (with shim) but would like to get the correct size. Any help is appreciated!
Frame is 531 straight-guage/hi tensile tubing with Nervex lugs.
02-20-22, 03:46 PM
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26.4 is correct
02-20-22, 08:02 PM
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02-20-22, 09:39 PM
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Next option, local bike co-op for used 26.0 to see how that works
02-20-22, 11:10 PM
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I’ve had SuperCourses that took a 26.2 mm post. I probably reported on that in this thread some 16 years ago.
02-21-22, 06:56 AM
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If the slot has parallel sides then likely yes - but to be sure(r) find something you know to be round and a little smaller than the hole; a socket from the toolbox may do.
Put the round thing centred in the hole and look from the top to judge the hole's circularity.
02-21-22, 12:31 PM
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Is the hole round?
If the slot has parallel sides then likely yes - but to be sure(r) find something you know to be round and a little smaller than the hole; a socket from the toolbox may do.
Put the round thing centred in the hole and look from the top to judge the hole's circularity.
If the slot has parallel sides then likely yes - but to be sure(r) find something you know to be round and a little smaller than the hole; a socket from the toolbox may do.
Put the round thing centred in the hole and look from the top to judge the hole's circularity.
02-21-22, 05:00 PM
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That is what I was going to suggest, since my 1959 Capo has plain gauge 531 and takes a 26.4. Frames with butted 531, like my 1962 Carlton FrancoSuisse, should take 27.2.
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Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
