Seapost clamp ID
04-20-15, 10:22 AM
#1
Senior Member
Thread Starter
Join Date: Aug 2006
Location: Land of Cheese
Posts: 1,079
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 111 Post(s)
Liked 213 Times
in
105 Posts
Seapost clamp ID
Hey,
I'm building a '90 Trek 8900 Pro mtb that's missing a seat post clamp on the frame.
Does anyone recognize the brand and type in this photo?
The rounded top fits over a seat tube top that's reduced in diameter, roughly 33.5mm.
Thank you!
I'm building a '90 Trek 8900 Pro mtb that's missing a seat post clamp on the frame.
Does anyone recognize the brand and type in this photo?
The rounded top fits over a seat tube top that's reduced in diameter, roughly 33.5mm.
Thank you!
Last edited by leftthread; 04-20-15 at 10:26 AM.
04-20-15, 11:56 AM
#2
Banned
does not look separate so you are asking about the seat post Outside diameter.
You need more accuracy of measurement .. Number 1 metric sizes of seat posts is in 0.2mm increments so 0.5 is neither .4 or .6.
buy a digital caliper , try for a measurement in hundredths of a MM thats second place behind the decimal point.
roughly 33.5mm.
You need more accuracy of measurement .. Number 1 metric sizes of seat posts is in 0.2mm increments so 0.5 is neither .4 or .6.
buy a digital caliper , try for a measurement in hundredths of a MM thats second place behind the decimal point.
04-20-15, 12:40 PM
#3
Senior Member
Thread Starter
Join Date: Aug 2006
Location: Land of Cheese
Posts: 1,079
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 111 Post(s)
Liked 213 Times
in
105 Posts
fietstbob, what I'm looking for is the actual clamp that fits on the seat tube. It's definitely a separate part with a rounded shoulder-type top.
I measured the seat tube with a micrometer and it is widely variable, so the number quoted is a rough average.
The first photo is from an auction ad.
The bike I'm working on:
I measured the seat tube with a micrometer and it is widely variable, so the number quoted is a rough average.
The first photo is from an auction ad.
The bike I'm working on:
04-29-15, 12:57 PM
#4
Senior Member
Those seat collars are a Trek specific part, most of the bonded mountain bikes seem to have them. I can't recall the actual size but I have one if you want it, no QR assembly just the collar.
