1" to 1-1/8" fork (possible?)

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Date: 07 Nov 2007 17:07:12
From: Pilgrim
Subject: 1" to 1-1/8" fork (possible?)

I have an old frame that was equipped with a fork that had a 1"
steerer. I am curious if I can install a 1-1/8" fork in the same
headtube. The races for the bearings seem to be pressed into the tube.
If i can remove these can I press in a new headset? Also does that job
require special tools, or knowledge?

Pilgrim

Date: 09 Nov 2007 15:13:26
From: Scott Gordo
Subject: Re: 1" to 1-1/8" fork (possible?)

On Nov 7, 8:07 pm, Pilgrim <je...@codery.com > wrote:
> I have an old frame that was equipped with a fork that had a 1"
> steerer. I am curious if I can install a 1-1/8" fork in the same
> headtube. The races for the bearings seem to be pressed into the tube.
> If i can remove these can I press in a new headset? Also does that job
> require special tools, or knowledge?
>
> Pilgrim

Is the old frame lugged steel? If so, maybe you can have the steerer
tube and lugs removed and replaced. Or, for that matter, if it's
welded steel, you could grind off the 1" head tube, re-miter the top
and down tubes, and have a 1 1/8 headtube installed.

Don't see why you'd want to go and do that, though. If it's a road
bike, there are still plenty of forks out there, and if it's an mtb,
Marzocchi makes a 1" Corsa fork. It's expensive, but so's any other
option I can think of, and less stressful to your frame. You can also
drop by your LBS and find out if they have any old Manitous lying
around....

/s

Date: 08 Nov 2007 19:32:06
From: JeffWills
Subject: Re: 1" to 1-1/8" fork (possible?)

On Nov 8, 2:45 pm, "Pete Grey" <pg...@hotmail.com > wrote:
> I've got a similar problem with my cross (rain bike).
> Everyone seems to have quit making decent forks with fender eyelets in 1".
> I'm speaking of the carbon variety, since I ride this bike on the road all
> winter.
> There are lots of solutions in 1-1/8, but not a single one in 1" anymore,
> and all the options seem to have disappeared from EBay as well. My current
> fork has a lot of years/abuse on it. I'm considering getting the head-tube
> replaced at some point.
>
> -pete
>

Is there some reason you *must* have a carbon fork? This fork:
http://harriscyclery.net/page.cfm?PageID=49&action=details&sku=FK2487
would seem to fit the bill- and at that price you could replace it
every couple years for the next decade and it'd still be cheaper than
a carbon fork.

Jeff

Date: 08 Nov 2007 23:25:22
From:
Subject: Re: 1" to 1-1/8" fork (possible?)

On Nov 8, 12:07 pm, Pilgrim <je...@codery.com > wrote:
> I have an old frame that was equipped with a fork that had a 1"
> steerer. I am curious if I can install a 1-1/8" fork in the same
> headtube. The races for the bearings seem to be pressed into the tube.
> If i can remove these can I press in a new headset? Also does that job
> require special tools, or knowledge?
>
> Pilgrim

I have done what you want to do, but I don't recommend it. I have a
frame which takes 1" threaded steerers but I bought a rather cheap
suspension fork with a 1-1/8" threadless steerer. I removed the
1-1/8" steerer, cut it so it was flush with the crown of the fork and
used it as an adapter to fit the 1" threaded steerer which I
subsequently welded to the remnants of the 1-1/8" steerer.

It was fairly labour intensive, and while I got the desired result I
don't know if I'd bother repeating the experience.

Date: 07 Nov 2007 23:40:22
From: David L. Johnson
Subject: Re: 1" to 1-1/8" fork (possible?)

Pilgrim wrote:
> I have an old frame that was equipped with a fork that had a 1"
> steerer. I am curious if I can install a 1-1/8" fork in the same
> headtube. The races for the bearings seem to be pressed into the tube.
> If i can remove these can I press in a new headset? Also does that job
> require special tools, or knowledge?

No, a 1-1/8 fork will not fit. The races are pressed in. They can be
drifted out by taking a long-enough copper pipe, placing it through the
head tube and against the bottom of the race, and hitting the other end
with a hammer. Be moderately gentle, and work around the sides of the
race.

To press the new races in you can use a specialized press, or a long
bolt with just the right size washers on either end. Be careful not to
damage the races, but also be sure to completely seat them.

--

David L. Johnson

It is a scientifically proven fact that a mid life crisis can only be
cured by something racy and Italian. Bianchis and Colnagos are a lot
cheaper than Maserattis and Ferraris.
-- Glenn Davies

Date: 07 Nov 2007 22:38:16
From: A Muzi
Subject: Re: 1" to 1-1/8" fork (possible?)

Date: 07 Nov 2007 23:06:50
From: Tom Sherman
Subject: Re: 1" to 1-1/8" fork (possible?)

Andrew Muzi wrote:
> Pilgrim wrote:
>> I have an old frame that was equipped with a fork that had a 1"
>> steerer. I am curious if I can install a 1-1/8" fork in the same
>> headtube. The races for the bearings seem to be pressed into the tube.
>> If i can remove these can I press in a new headset? Also does that job
>> require special tools, or knowledge?
>
> No.
> Small things go in big bores (adapter)
> Not big things in small bores.

butbutbut, a 1-1/8" fork can be inserted in a 1" head-tube without a
headset to rattle around uselessly!

(Does anyone recall that silly discussion from the past?)

--
Tom Sherman - Holstein-Friesland Bovinia
Tradition is the worst rational for action.

Date: 07 Nov 2007 20:34:50
From: JeffWills
Subject: Re: 1" to 1-1/8" fork (possible?)

On Nov 7, 5:07 pm, Pilgrim <je...@codery.com > wrote:
> I have an old frame that was equipped with a fork that had a 1"
> steerer. I am curious if I can install a 1-1/8" fork in the same
> headtube. The races for the bearings seem to be pressed into the tube.
> If i can remove these can I press in a new headset? Also does that job
> require special tools, or knowledge?
>
> Pilgrim

It can't be done. Even with special tools and knowledge, you *could*
(in theory) ream out the headtube for the larger headset cups. This
would probably leave so little material at the top and bottom of the
headtube that it would fail immediately, if not sooner.

What's so special about the 1 1/8" fork that you've picked out? Can't
you find an equilvalent 1" fork?

Jeff

Date: 08 Nov 2007 14:45:22
From: Pete Grey
Subject: Re: 1" to 1-1/8" fork (possible?)

I've got a similar problem with my cross (rain bike).
Everyone seems to have quit making decent forks with fender eyelets in 1".
I'm speaking of the carbon variety, since I ride this bike on the road all
winter.
There are lots of solutions in 1-1/8, but not a single one in 1" anymore,
and all the options seem to have disappeared from EBay as well. My current
fork has a lot of years/abuse on it. I'm considering getting the head-tube
replaced at some point.

-pete

"JeffWills" <jwills@pacifier.com > wrote in message
news:1194496490.443437.243620@i38g2000prf.googlegroups.com...
> On Nov 7, 5:07 pm, Pilgrim <je...@codery.com> wrote:
>> I have an old frame that was equipped with a fork that had a 1"
>> steerer. I am curious if I can install a 1-1/8" fork in the same
>> headtube. The races for the bearings seem to be pressed into the tube.
>> If i can remove these can I press in a new headset? Also does that job
>> require special tools, or knowledge?
>>
>> Pilgrim
>
> It can't be done. Even with special tools and knowledge, you *could*
> (in theory) ream out the headtube for the larger headset cups. This
> would probably leave so little material at the top and bottom of the
> headtube that it would fail immediately, if not sooner.
>
> What's so special about the 1 1/8" fork that you've picked out? Can't
> you find an equilvalent 1" fork?
>
> Jeff
>

Date: 07 Nov 2007 17:16:58
From: RS
Subject: Re: 1" to 1-1/8" fork (possible?)

Probably won't work. You can stay with a 1" and use a 1" to 1 1/8"
adaptor on the fork protusion and then use "standard" 1 1/8 threadless
stems.

In article
<1194484032.422226.176440@i13g2000prf.googlegroups.com >,
jesse@codery.com says...
>
>
>I have an old frame that was equipped with a fork that had a 1"
>steerer. I am curious if I can install a 1-1/8" fork in the same
>headtube. The races for the bearings seem to be pressed into the tube.
>If i can remove these can I press in a new headset? Also does that job
>require special tools, or knowledge?
>
>Pilgrim
>