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Schwinn World Sport seatpost dia?

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Schwinn World Sport seatpost dia?

Old 04-01-05, 10:15 AM
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colinm
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Schwinn World Sport seatpost dia?

Rebuilding my buddy's. He's tall and the frame is smaller than it should be, and he had the seatpost WAY above the min mark. Either he tweaked the seat tube and the OE post won't go in, or he has the wrong post. 26.6 was in there, but I can't get it in past the split in the lug. Maybe 26.4?

If anyone can tell, please advise. I did find one catalog and it said 26.6, but other schwinns in the list also had 26.4, and the year was likely not correct.

Made in Taiwan, black with yellow and white details.
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Old 04-01-05, 11:17 AM
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Originally Posted by colinm
If anyone can tell, please advise. I did find one catalog and it said 26.6, but other schwinns in the list also had 26.4, and the year was likely not correct.
Measuring it is the surest way to tell. Take the seatpost and go to the 3M factory gates around quitting time and stop every car coming out until you find an engineer (who'll surely have precision calipers in his pocket). Have him measure it twice - just to be sure.

(see you bike forums guys - THAT is what an April Fool's joke is supposed to be like)

Seriously, take a close look at the seat tube opening. Does it look round from the top? Then look at it from the rear. Does the split look to be gapped consistently from top to bottom. If either of the answers is no, you'll need to resolve that situation before doing anything else. Search this part of the forum for the word "screwdriver", and I'm sure you'll find a post that explains how to manipulate the clamp ears. It involves carefully levering them open by the openings of the ears using a stout screwdriver or something similar.

Once you have a round opening, try the 26.6 seatpost again. If it still doesn't work, take it to the LBS or a bike enthusiast who has lots of experience and equipment. In Minneapolis, this shouldn't be much trouble.

Good luck.
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Old 04-01-05, 11:42 AM
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If you have access to a machine shop you could always just turn it down to 26.4mm. After all, whats .2mm?
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Old 04-01-05, 12:05 PM
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I just never know how to measure for a seatpost - the clamp area at the mouth of the seat tube is meant to be slightly oversized in order to accept the post, and measuring that diameter and rounding down to the next common size seems crude.

I once searched the earth for the proper post for my Hardrock circa '96, thought it was 31.8 or something - wound up 30.2 per the shop. I've never heard of a 30.2, but they had one.
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Old 04-04-05, 07:18 AM
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Solved in one of two ways -

1. Picked up a Super Grand Prix for $25 that's the same size or larger. Seeing as both the seatpost AND the stem were well over the max on the original bike, this is a good thing.

2. I forgot about the junker Schwinn city bike hanging on the wall. 25.6 post in that one, and it fits loosely. Beercan shim should do it.

I'll clean them both up and give both back. 2 for 1.
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Old 04-04-05, 09:58 PM
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Sheldon Brown has a seatpost size database on his site...
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Old 04-05-05, 06:50 AM
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Taiwan
Schwinn Cruiser Six 1995 22.0
Schwinn Le Tour Luxe 1985? 26.4
Schwinn Moab 1997 26.6
Schwinn Paramount OS 1991 27.4
Schwinn Sierra 1988 26.0
Schwinn 764 Aluminum ? 27.2 Internal expanding seatpost. Mississippi.
Schwinn Super Sport 1982 26.8
Schwinn Voyager ? 26.8 Mississippi
Schwinn Tempo 1983 26.8
Schwinn Tempo 1986 26.6
Schwinn Traveler early '90s 26.0

Looks like a crapshoot, and no World Sport.
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Old 09-06-15, 05:28 PM
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Wow. 10 years later and I dig a world sport out of the trash. No post. I google it and find my old thread.

26.6 post from the local used bin, perfect fit.

LOL
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