Question on seat post size and bolt
12-24-13 | 06:30 AM
#1
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Question on seat post size and bolt
Hi guys,
I need to confirm this before my purchase. Appreciate your inputs, thanks!
The frame diameter is reading at 26mm. Generally speaking, a 26mm seat post would fit?
The seat bolt would have few sizes from ebay. This is what I have measured on the frame. Is 19mm fit for my frame?
I need to confirm this before my purchase. Appreciate your inputs, thanks!
The frame diameter is reading at 26mm. Generally speaking, a 26mm seat post would fit?
The seat bolt would have few sizes from ebay. This is what I have measured on the frame. Is 19mm fit for my frame?
12-24-13 | 07:20 AM
#2
Bianchi Goddess
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As to the binder bolt... is there a notch on the other side of the lug? If so you need a bolt with a 'key' on it. Otherwise you need a "Campagnolo" style which is knurled at the anchor side.
I never had any luck measuring seatpost size with a caliper, this is a case where if possible your better off taking it to the local bike shop.
I never had any luck measuring seatpost size with a caliper, this is a case where if possible your better off taking it to the local bike shop.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
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12-24-13 | 07:36 AM
#3
What??? Only 2 wheels?
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Seatposts come in many sizes. Yours could be 26.2, for example.
There is one more thing to consider. The opening in the seat tube may not be round, because it got bent a little near the slot from previous use. When you measure the inner diameter, measure it at several different angles.
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jimmuller
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12-24-13 | 07:40 AM
#4
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I may very well be mistaken, but it looks like the previous binder bolt was drilled out and part of the head is still in there ...
12-24-13 | 07:59 AM
#5
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As Jim said, I'll bet it's a hair over 26.0 mm. That "hair" is the important part and it's tough to determine with a good caliper, let alone a cheap plastic one.
Your local bike shop may have a seat post diameter measuring rod, and it might be best to see if they do. One thing, before you measure it again, take some 400 grit sandpaper and clean the paint out of that seat tube. And then lightly grease the inside of the tube. You'll be glad you did.
Your local bike shop may have a seat post diameter measuring rod, and it might be best to see if they do. One thing, before you measure it again, take some 400 grit sandpaper and clean the paint out of that seat tube. And then lightly grease the inside of the tube. You'll be glad you did.
12-24-13 | 09:52 AM
#6
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Is your frame a known brand and model? That would also help in determining the correct diameter seat post.
Your caliper doesn't have the precision to measure for the required diameter.
Your caliper doesn't have the precision to measure for the required diameter.
12-24-13 | 10:50 AM
#7
What??? Only 2 wheels?
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From: Boston-ish, MA
Bikes: 72 Peugeot UO-8, 82 Peugeot TH8, 87 Bianchi Brava, 76? Masi Grand Criterium, 74 Motobecane Champion Team, 86 & 77 Gazelle champion mondial, 81? Grandis, 82? Tommasini, 83 Peugeot PF10
You are right. It does say 24.something. The something appears to be less than .4, but that is only a wild guess, more like 24.2.
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Real cyclists use toe clips.
With great bikes comes great responsibility.
jimmuller
Real cyclists use toe clips.
With great bikes comes great responsibility.
jimmuller
12-24-13 | 11:45 AM
#8
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24.XX mm size is not common. Closest common size to that would be 25mm...
What kind of bike is that anyway??
What kind of bike is that anyway??
