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RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  Odd seatpost clamp size
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Author Topic: Odd seatpost clamp size  (Read 1365 times)

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Offline Devilock

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Odd seatpost clamp size
« on: April 24, 2012, 03:51 PM »
Can anyone suggest a generous size seatpost clamp (apart from a DC twin or hinge) as my Torker seatpost tube is just a little bigger than standard...?!


Offline BENDYCAT ELEVENTEEN

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Re: Odd seatpost clamp size
« Reply #1 on: April 24, 2012, 04:12 PM »
burner one  ;) 25. ?
The Devil is away on business, I'm having to step in for him - How can I make your day Hell !!!

Offline Devilock

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Re: Odd seatpost clamp size
« Reply #2 on: April 24, 2012, 04:54 PM »
burner one  ;) 25. ?

Not sure...I know its not due to any thick paint as its chrome. So what are the options...??  :-\

Im not using a Raleigh  :yahoo_silent:  :D

Offline BENDYCAT ELEVENTEEN

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Re: Odd seatpost clamp size
« Reply #3 on: April 24, 2012, 05:16 PM »
well some of the tange ones are bigger - you got nothing to mesure it with ?
The Devil is away on business, I'm having to step in for him - How can I make your day Hell !!!

Offline Devilock

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Re: Odd seatpost clamp size
« Reply #4 on: April 24, 2012, 05:27 PM »
well some of the tange ones are bigger - you got nothing to mesure it with ?

Tried a Tange & its too small! Not at home so Ill measure later... Ill probably just buy a twin bolt!

Also, my DC hinged doesn't really fit correctly either...!!  :wtf:

Offline BENDYCAT ELEVENTEEN

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Re: Odd seatpost clamp size
« Reply #5 on: April 24, 2012, 06:39 PM »
have seen a couple of post that are bigger - and as you know mk 1 burners are the same

give it a measure and we can see what we can dig out for you  ;)
The Devil is away on business, I'm having to step in for him - How can I make your day Hell !!!

sid1972

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Re: Odd seatpost clamp size
« Reply #6 on: April 24, 2012, 06:56 PM »
Gaz, had a oversized suntour clamp in gold for sale not long back, i am sure that was burner size. But its the standard suntour just bigger.  ;)

Offline BENDYCAT ELEVENTEEN

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Re: Odd seatpost clamp size
« Reply #7 on: April 24, 2012, 07:06 PM »
yer seem to remember there were two sizes -larger fitted burners as did the tange  ???
The Devil is away on business, I'm having to step in for him - How can I make your day Hell !!!

sid1972

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Re: Odd seatpost clamp size
« Reply #8 on: April 24, 2012, 07:28 PM »
Here you go - I sold it him for more than he is asking anyway, not sure if it sold though drop poolysheriff a pm.

Offline Devilock

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Re: Odd seatpost clamp size
« Reply #9 on: April 24, 2012, 08:15 PM »
True...Gaz has got everything...!

Ill measure it...
& the seat tube...!!!

Offline Devilock

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Re: Odd seatpost clamp size
« Reply #10 on: April 25, 2012, 04:12 PM »
Right, Ive measured the seatpost tube on the Torker & it has a circumference of 81.5cm. Measured my TA & thats 80cm... Why the fúck would it be 1.5cm bigger??!!?!? Stupid...

Offline Devilock

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Re: Odd seatpost clamp size
« Reply #11 on: April 25, 2012, 04:14 PM »
Oh, I also measured a Tange seatpost tube & that is 80cm...

Offline MartyC

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Re: Odd seatpost clamp size
« Reply #12 on: April 25, 2012, 04:18 PM »
Thickness of the paint/powder could easily account for that  :-\ .


Better to crash and burn than fade away

Offline Devilock

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Re: Odd seatpost clamp size
« Reply #13 on: April 25, 2012, 04:43 PM »
Ah, no because all the frames measured are chrome...

Offline Devilock

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Re: Odd seatpost clamp size
« Reply #14 on: April 25, 2012, 04:43 PM »
All original chrome too...

Offline BENDYCAT ELEVENTEEN

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Re: Odd seatpost clamp size
« Reply #15 on: April 25, 2012, 09:12 PM »
ok so the seat clamp doesn't go on

does the seat post you have slide in smooth or tight ?

have you tried a couple of different post in there ?

you know the 1.5 mm could be a seat post that was slightly larger fitted and has opened up the seat tube top where the split is ?

maybe measure the thickness of the metal on a couple of your other bmx's to see what they are like ?

you may find it's thicker ?

you may also find that with the right seat post you can squeeze together the seat post about 1.5 mm and it will allow a good clamp on there ?
The Devil is away on business, I'm having to step in for him - How can I make your day Hell !!!

HEYWOOD BMX

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Re: Odd seatpost clamp size
« Reply #16 on: April 26, 2012, 09:51 AM »
Does a newschool clamp fit? If so,it`ll be a 28.6mm (1 1/8) internal diameter.

Offline MartyC

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Re: Odd seatpost clamp size
« Reply #17 on: April 26, 2012, 10:39 AM »
Right:

80MM circumference  = 25.4mm Diameter

81.5MM circumference = 25.9mm Diameter

http://www.rkm.com.au/calculators/calculator-circle-sphere.html

I would suggest that it's MM not CM as it would have to be a fooking huge frame  :LolLolLolLol:

That level of difference is tiny, less than half a millimetre so most likely within a manufacturing tolerance.  Try opening up the seat post clamp a little when you put it on or sand down the inside of the clamp with wet & dry to remove some of the material.  Obviously opening the clamp up a little with a wooden wedge is the least damaging to the clamp!


Better to crash and burn than fade away

RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  Odd seatpost clamp size
 

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