High-tensile double butted
02-15-11 | 01:18 PM
#1
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From: Washington County, Vermont, USA
Bikes: 1973-4 Gitane Tour de France, early 1970's Lejeune, 1970 Italvega Super Speciale, 2010 Surly Long Haul Trucker 26
High-tensile double butted
Wow! The decal actually says it's Tange double-butted high-tensile. Who knew?
https://cgi.ebay.com/Sekai-Competitio...#ht_1937wt_802
https://cgi.ebay.com/Sekai-Competitio...#ht_1937wt_802
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02-15-11 | 02:40 PM
#3
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From: Washington County, Vermont, USA
Bikes: 1973-4 Gitane Tour de France, early 1970's Lejeune, 1970 Italvega Super Speciale, 2010 Surly Long Haul Trucker 26
Yikes, didn't even notice the fork. But then, I wasn't thinking about buying the bike.
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www.redclovercomponents.com
"Progress might have been all right once, but it has gone on too long."
--Ogden Nash
www.redclovercomponents.com
"Progress might have been all right once, but it has gone on too long."
--Ogden Nash
02-15-11 | 02:59 PM
#4
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From: Portsmouth, NH
Double butted high tension? It happens: Fuji S10-S
02-15-11 | 03:34 PM
#6
I presume that this is not cold-drawn seamless tubing, but rather rolled and welded. The Japanese (and maybe Tange especially) were doing a lot to advance that method of making tubing, and I believe that some of the later examples were so good you almost couldn't tell there was a welded seam. It's pretty easy to add butting (single, double, quad, whatever) when you are starting with flat stock, compared with the mandrel magic required to cold-draw seamless butted tubes.
02-16-11 | 11:02 AM
#7
curmudgineer
Joined: Dec 2009
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From: Chicago SW burbs
Bikes: 2 many 2 fit here
I owned a new 1976 Empire Professional and I recently acquired its stable mate as a nostalgic restoration project. These bikes have hi-tensile DB tubing; I suspect the Empire brand was private label applied to another manufacturer's product, since it appeared and disappeared like a mushroom in 1976.
06-09-14 | 03:51 PM
#8
Thrifty Bill
Joined: Jan 2008
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From: Mans of NC & SW UT Desert
Bikes: 86 Katakura Silk, 87 Prologue X2, 88 Cimarron LE, 1975 Sekai 4000 Professional, 73 Paramount, plus more
Reviving this old thread, adding some pictures for the future. Just finished a Sekai 2700. Tange, double butted high ten steel. WTF? Bike also came with G1 Cyclone RD, and a nice SR Apex crankset and Gran Compe brakes. I have to wonder how much they saved going high ten steel versus cro-moly, probably just a few dollars.
Bike was light for high ten steel, weighed in at 26.74 pounds. 25.8mm seat post.
Bike was light for high ten steel, weighed in at 26.74 pounds. 25.8mm seat post.
Last edited by wrk101; 06-09-14 at 04:21 PM.
06-09-14 | 04:10 PM
#9
Decrepit Member
Joined: Aug 2005
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From: Santa Rosa, California
Bikes: Waterford 953 RS-22, several Paramounts
Reviving this old thread, adding some pictures for the future. Just finished a Sekai 2700. Tange, double butted high ten steel. WTF? Bike also came with G1 Cyclone RD, and a nice SR Apex crankset and Gran Compe brakes. I have to wonder how much they saved going high ten steel versus cro-moly, probably just a few dollars.
Bike was light for high ten steel, weighed in at 26.74 pounds.
Bike was light for high ten steel, weighed in at 26.74 pounds.
02-09-24 | 09:22 PM
#13
Ride, Wrench, Swap, Race
Joined: Jan 2010
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From: Northern California
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
Even my lower-end Sekai 500 (and even lower-end, 33lb Bridgestone Submariner) had/(has) DB Hi-Ten tubing stickers.
Peugeot's Carbolite wasn't butted as far as I know, but built a lighter lugged frame.
Peugeot's Carbolite wasn't butted as far as I know, but built a lighter lugged frame.
02-11-24 | 10:37 AM
#17
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From: SoCal
Bikes: Cuevas & Cimmaron are my full time riders, small MB-3 and large Competition GS are my sometimers
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