26.6mm vs 26.8mm seatpost

I'm replacing a seat post on an old bike. Current seat post is marked
26.6mm. Smallest option for the replacement I want to use is 26.8mm.

Problem?

On Mon, 30 Jun 2008 09:34:28 -0700 (PDT), wrote:

I'm replacing a seat post on an old bike. Current seat post is marked
26.6mm. Smallest option for the replacement I want to use is 26.8mm.

Problem?

Not if you have(access to) a lathe.

wrote:
I'm replacing a seat post on an old bike. Current seat post is marked
26.6mm. Smallest option for the replacement I want to use is 26.8mm.

Problem?


You buy shoes one size to small?

Lou

wrote:
I'm replacing a seat post on an old bike. Current seat post is marked
26.6mm. Smallest option for the replacement I want to use is 26.8mm.

Problem?

Typically, seat post tolerances with the seat tube are fairly tight.
However, if a 26.8 can be inserted without use of excessive force, I
don't see why this should be a problem. If it does not fit, a good shop
should be able to ream out the seat tube so that the 26.8 fits.

wrote:

I'm replacing a seat post on an old bike. Current seat post is marked
26.6mm. Smallest option for the replacement I want to use is 26.8mm.

Regardless of the marked sizes of the current and prospective posts,
what counts is whether the post you want slips into the frame without
being forced. The largest size that fits (without being forced) is
the best size.

Chalo

_ wrote:
On Mon, 30 Jun 2008 09:34:28 -0700 (PDT), wrote:

I'm replacing a seat post on an old bike. Current seat post is marked
26.6mm. Smallest option for the replacement I want to use is 26.8mm.

Problem?

Not if you have(access to) a lathe.

If you make turning down a seatpost sound easy you are either devious or
you've never tried it

--
/Marten

info(apestaartje)m-gineering(punt)nl

On Mon, 30 Jun 2008 22:44:40 +0200, M-gineering wrote:

_ wrote:
On Mon, 30 Jun 2008 09:34:28 -0700 (PDT), wrote:

I'm replacing a seat post on an old bike. Current seat post is marked
26.6mm. Smallest option for the replacement I want to use is 26.8mm.

Problem?

Not if you have(access to) a lathe.

If you make turning down a seatpost sound easy you are either devious or
you've never tried it

a) yes I've done it

b) no it's not hard; you do it between centres with a dog - grip the post
at the bottom in a three-jaw, bore a conical hole in the other end for the
centre, and it's easy.

In article
,
wrote:

I'm replacing a seat post on an old bike. Current seat post is marked
26.6mm. Smallest option for the replacement I want to use is 26.8mm.

Problem?

The reason seat post diameters change in 0.2 mm increments,
and the reason seat posts are accurately made is because
that 0.2 mm makes a huge difference. The oversize seatpost
will have to be hammered in; and I mean 2 pound single jack.
Then you will never get it out. Want to adjust the saddle
height? Good luck. Easier would be to try a seat post
undersized by 0.2 mm. You will never get it to stay up,
unless you shim it.

On the other hand, if you are looking for a problem ...

--
Michael Press

In article
,
Chalo wrote:

wrote:

I'm replacing a seat post on an old bike. Current seat post is marked
26.6mm. Smallest option for the replacement I want to use is 26.8mm.

Regardless of the marked sizes of the current and prospective posts,
what counts is whether the post you want slips into the frame without
being forced. The largest size that fits (without being forced) is
the best size.

If you have plenty of experience. Otherwise it is not that
simple. I bought a used frame. The rated seatpost did not
fit. Not until I opened the seat post slot. Then it fit
hand in glove. Had I used your recipe I would have had
a too small seat post that would not have fit properly
and would have always slipped down.

--
Michael Press

On Jun 30, 10:34*am, wrote:
I'm replacing a seat post on an old bike. Current seat post is marked
26.6mm. Smallest option for the replacement I want to use is 26.8mm.

Problem?

The only problem is that the 26.8mm post won't fit..teeny problem.
Reem the seat tube to 26.8 or get a 26.6mm seat post.