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Seatpost size for Pasnasonic Sport 1000?

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Seatpost size for Pasnasonic Sport 1000?

Old 10-24-07, 02:23 PM
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Seatpost size for Pasnasonic Sport 1000?

Bought my son a vintage Panasonic Sport 1000. Looks to be from early to mid 80s. Came with a generic straight 25.4 seatpost and a shim. I'd like to replace the post with a modern one. Sheldon doesn't have a Sport 1000 on his database. Anybody know what diameter post I need?
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Old 10-24-07, 07:19 PM
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sit tight. I have this exact bike. I'm out of town, will get you the answer this weekend.
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Old 10-26-07, 04:46 AM
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My son had this exact bike (a 1986 model) and, while we scrapped the frame a couple of years ago, I still have what I'm pretty sure is the seatpost. It's an SR Laprade 26.0 mm diameter. Let's see if mrmw can confirm this.
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Old 10-26-07, 06:56 AM
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thanks guys

I was guessing either a 26.0 or a 26.6 (old Schwinn 25.6 is too small and my 27.2 is too big). If mrmw confirms it's a 26.0 I'll order one. Thanks for your help!!
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Old 10-26-07, 10:15 AM
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Will try to look tonight/tomorrow, and will answer if no one else does. I have this exact same bike.
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Old 10-26-07, 05:19 PM
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Pull out a caliper and measure it.
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Old 10-26-07, 07:29 PM
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If I had a caliper and could measure it, I wouldn't be asking
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Old 10-27-07, 04:37 AM
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Solution is obvious.
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Old 10-27-07, 05:37 AM
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I don't want to take it to the LBS if I don't have to. If I do, they'll tell me the size, which they won't have in stock. The shop'll offer me another (better) 25.4 with a shim, I'll decline knowing the actual size is available somewhere on ebay, and then we'll both feel bad that I wasted their time. I don't want to piss off the guys at the LBS, especially since I just moved here. Hopefully mrmw or supton can confirm the size for me
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Old 10-27-07, 05:39 AM
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Originally Posted by mrmw View Post
sit tight. I have this exact bike. I'm out of town, will get you the answer this weekend.
we got home yesterday afternoon, here's the report:

seat post is a 26.0 mm on our circa 1985 panasonic sport 1000 with Tange 900 tubes.

so marked at its base, and so measured with a digital caliper.
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Old 10-27-07, 07:01 AM
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Thank You Very Much!!!
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Old 10-27-07, 10:36 AM
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Harbor Freight is where I bought my digital caliper for like $15. Reads down to 0.001" (although I'd question the accuracy of a $15 caliper). Just an FYI.

Not to hijack, but does your have the same odd setup as mine does? 53cm seatpost tube, and 57cm top tube? I thought seat and top tubes tended to be the same length.
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Old 10-27-07, 04:54 PM
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Yeah, not only do you the same bike, you have the same size frame. I get the same 53 cm for the seat tube and 57 for the top tube. I guess the 53/57 geometry is a little weird; my bike, a Soma Double Cross has a 59 cm top tube and 58 seat tube and they actually warn you how long the top tube is. I know this is overkill but did you get 26.0 for the seatpost, too?
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Old 10-27-07, 06:40 PM
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25.95mm, pretty close to 26mm if you ask me.

Oddly enough, I went for a bike fitting recently on my bike; and was told that the cockpit was cramped for me! Wrong stem angle. I'm guessing I have short legs, and could stand to stretch out more. I pulled the stem an inch above the max limit shown (to try out); still not perfect but it did almost get the bars up pretty close to being level with the seat.
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Old 10-27-07, 08:37 PM
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Thanks, I guess I'm pretty safe to buy a 26.0. Only ones available for a reasonable amount are 350mm mtb posts. About your stem, raising the stem actually decreases the reach although it will be much easier on your back. If you really want to stretch, you might need a longer stem, not a higher one. If you want to get the bars higher, somebody's selling NOS SR stems pretty cheap (less than $20 including shipping) on eBay. They look to be at least a couple of inches higher (but also a bit shorter) than the stock Panasonic stem. I already ordered one along with a cheap Nitto bar (the model 135 Randonneur) to make it easier for my son to reach. I'm having fun with the bike even though my son will never appreciate all the upgrades. Thanks again for your help.
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Old 10-28-07, 06:13 PM
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Originally Posted by soma2x View Post
Thanks, I guess I'm pretty safe to buy a 26.0. Only ones available for a reasonable amount are 350mm mtb posts.
You can cut off the excess length if you want to. Measure how far the "minimum insertion" mark is above the post's end and be sure you leave at least that much excess when you cut down the post to a more reasonable length.

I bought an Easton seatpost for a recent bike build and the only one available in the then new 31.6 mm diameter was one of their MTB posts. I was able to cut off 115 mm of extra post and still leave plenty of length in the frame when the saddle height was correct.
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Old 10-28-07, 06:51 PM
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Yeah, when I raised the stem, I was going for getting the bars more level to the seat; then when for the fitting where I was told that the reach wasn't optimal. So I have to figure out what is needed for a stem; but I haven't made up my mind on replacing the stem, given how much else really needs to be replaced too. But as my first road bike, I'm loathe to ditch it just yet.

Anyhow, have fun, glad I could help.
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