Carbon Seatpost Torque value??

Zyggy said:

Using a Torque wrench to tighten my Bontrager Carbon Seat post how much
torque should I apply.
I have both a Carbon Frame bike and a Aluminum Frame bike are they
different torque values for each?
Seat collar is Aluminum on both.

You'll strip the threads in your collar before you'll hurt anything else.
Just make the bolt snug and don't worry about it.

Matt O.

Matt O'Toole said:

Zyggy said:

Using a Torque wrench to tighten my Bontrager Carbon Seat post how
much torque should I apply.
I have both a Carbon Frame bike and a Aluminum Frame bike are they
different torque values for each?
Seat collar is Aluminum on both.

You'll strip the threads in your collar before you'll hurt anything
else. Just make the bolt snug and don't worry about it.

Whoa... you couldn't be more wrong. Maybe if the OP was using a 2mm-head
bolt would it never hurt anything else, but 4mm bolts and larger, which are
the typical size, will crush carbon and aluminum seatposts easily.
--
Phil, Squid-in-Training

Zyggy said:

Using a Torque wrench to tighten my Bontrager Carbon Seat post how
much torque should I apply.
I have both a Carbon Frame bike and a Aluminum Frame bike are they
different torque values for each?
Seat collar is Aluminum on both.

Orient the slit of the clamp opposite from the slit on the seat tube. This
evens out the stresses on the seatpost.

--
Phil, Squid-in-Training

The squid is not joking. Litespeed has a 6mm allen bolt on a sturdy clamp,
and I manageed to dent my Thomson Elite seatpost using a short allen key and
not all that much effort. Thomson elite is a bit special, though - thinner
on the sides and thicker on the front and back. I dented the thin sides.

"Phil, Squid-in-Training" <[email hidden]> wrote in
message news:56aPf.480928$0l5.479338@dukeread06...

Quoted message said:

Matt O'Toole said:

Zyggy said:

Using a Torque wrench to tighten my Bontrager Carbon Seat post how
much torque should I apply.
I have both a Carbon Frame bike and a Aluminum Frame bike are they
different torque values for each?
Seat collar is Aluminum on both.

You'll strip the threads in your collar before you'll hurt anything
else. Just make the bolt snug and don't worry about it.

Whoa... you couldn't be more wrong. Maybe if the OP was using a 2mm-head
bolt would it never hurt anything else, but 4mm bolts and larger, which
are the typical size, will crush carbon and aluminum seatposts easily.
--
Phil, Squid-in-Training

"Anon Poster" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"Phil, Squid-in-Training" <[email hidden]> wrote in
message news:56aPf.480928$0l5.479338@dukeread06...

Quoted message said:

Matt O'Toole said:

On Mon, 06 Mar 2006 22:27:20 -0500, Zyggy wrote:

> Using a Torque wrench to tighten my Bontrager Carbon Seat post how
> much torque should I apply.
> I have both a Carbon Frame bike and a Aluminum Frame bike are they
> different torque values for each?
> Seat collar is Aluminum on both.

You'll strip the threads in your collar before you'll hurt anything
else. Just make the bolt snug and don't worry about it.

Whoa... you couldn't be more wrong. Maybe if the OP was using a

2mm-head

Quoted message said:

Quoted message said:

bolt would it never hurt anything else, but 4mm bolts and larger, which
are the typical size, will crush carbon and aluminum seatposts easily.
--
Phil, Squid-in-Training

Quoted message said:

The squid is not joking. Litespeed has a 6mm allen bolt on a sturdy

clamp,

Quoted message said:

and I manageed to dent my Thomson Elite seatpost using a short allen key

and

Quoted message said:

not all that much effort. Thomson elite is a bit special, though -

thinner

Quoted message said:

on the sides and thicker on the front and back. I dented the thin sides.

I have a Thomson Elite seatpost in a Scott CR1 carbon frame and I torqued
the clamp with 5 Nm. All the torque specs I have seen in the instruction
sheets of high end (?) and light parts (seatpost, stem, handlebar) are in
the 5-7 Nm range.

Lou

According to Bontrager's web site, 65-80 lb·in (7.3-9 Nm) for a
carbon fiber seatpost.

http://www.bontrager.com/assets/File_Listings/asset_upload_file302_970.pdf

Zyggy said:

Using a Torque wrench to tighten my Bontrager Carbon Seat post how much
torque should I apply.
I have both a Carbon Frame bike and a Aluminum Frame bike are they
different torque values for each?
Seat collar is Aluminum on both.

Bontrager's instructions call for 65 to 80 inch pounds.

http://www.bontrager.com/assets/File_Listings/asset_upload_file302_970.pdf

Quoted message said:

Zyggy

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