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#26 2008-05-21 7:27pm

Neil-Son
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From: BMX museum
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

How about doing a 1 inch threaded fork on a new school frame with 1-1/8 headtube?

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#27 2008-05-22 6:10am

BridgeCity
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

That requires a modified 1 inch cup to have a fatter outer diameter to fit the 1 1/8 headtube.

I've made them before and I don't know of anyone currently selling the kit.  someone in the UK in the past was selling them but not any longer.

see the retro quad in My Bikes to see what it looks like.

 

#28 2008-05-22 9:01am

Neil-Son
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

Thanks bud.if you happen to come accross it or maybe a part number please post.Ill do some searching

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#29 2008-05-22 11:18pm

coasty
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From: Queensland, Australia
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

Dans comp sells a shim to reduce the tube from 1 1/8 to mini and BMX to mini. Now what size is Mini then?


70's bmx is where it's at.

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#30 2008-05-23 6:45am

BridgeCity
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

i've never seen a BMX to mini (road bike) shim on there.

the only shim I know of at dan's comp is 1 1/8 to mini/Standard/road bike

can you post a link to the BMX to mini shim you are talking about?

Last edited by BridgeCity (2008-05-23 6:45am)

 

#31 2008-05-23 7:39am

coasty
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From: Queensland, Australia
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

Right next to the ones you mention.
http://www.danscomp.com/products.php?ca … adsetsMisc


70's bmx is where it's at.

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#32 2008-05-23 8:12am

BridgeCity
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

Interesting. It's kind of like buying pipe fittings at the Hardware store.  Unfortunately, that won't land you at the needed BMX size.

Here is the tech info from chrisking.com (these sizes are .1 mm under the actual specs)

Bore Sizing:
Head Tube Bore Size
1" Standard 30.1mm
1" BMX 32.7mm
1-1/8" 33.9mm

So for a Standard/roadbike/mini the OD is roughly 30mm for the cup OD (outer diameter)
the old school BMX would need approximately 33mm for the OD
and the new school 1 1/8 cup OD is about 34mm.

When you do the math on these diameters you can figure the thickness of the shim needed.

to go from 1 1/8 to BMX.   (34mm-33mm) / 2 = .5mm
the shim needs to be .5mm which is around the thickness of 5 popcan metal layers.
So you can see it isn't feasible to sell a shim that thin because it would get destroyed during the installation.

The true solution for 1 1/8 to BMX. is to take the smaller BMX cup, add thickness to it with weld, then turn it down to the exact OD specs (to the thousandth of an inch).

this item has been sold in the past but I know of no one selling this product right now.

With the resurgence of vintage and retro, it would be awesome to have available.

Someone should put a bug in Todd Lyons ear to whip out a bunch of these for their retro bikes which will compliment the 1 inch threaded BMX LG forks that are rumored to be available soon.

Maybe Capt. Nemo or PWH can plead the case with TL?  smile

 

#33 2008-05-26 11:38am

FRESSTYLE FREEK
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From: Fountain Valley, CA
Registered: 2007-06-28
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

actuly thay do make one its specil order itum but cunverts 1 1/8 stear tub to fit 1" stear tubs. my local bike store had them in stock 4 years a go. for kids that could not afored thread less forks. thay got a sweet deal on GT 1"inch forks hade but loads of them. thay did not and still do not no old school is big $money$ know. thay sold a NOS robinson amtrack frame and fork to me $75.00 just to get rid of it for space. I sold it ebay $250.00. to bad thay dont have any more race forks 1" inch. local colleters like me piced them clean!!


Kindness is like Manure does You No Good unless You spread It around
bikes were made to be pedalled if we don't ride them they get sad:(!
YES I RIDE A PINK BIKE!! WANT TO MAKE SOME THING OUT OF IT!

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#34 2008-06-16 1:10am

revcore
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

There is a company that makes headsets by the name of Modus. About 7 years ago I bought a cheap 1-1/8" Modus headset and found it was compatible with the 1" cups in my old school frame. I wish I could remember the part number because it was so simple to do the 1-1/8 conversion.


"Of all the things I've lost, I miss my mind the most"

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#35 2008-06-26 9:20pm

Neil-Son
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

This just shows that nothings impossible when it comes to our bikes..big_smile..Thanks for all the helpful and useful post guys

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#36 2008-07-09 2:50am

Dr.Robotnik
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

Can anyone explain or point me to a kit which allows you to put 1 inch forks on a 1 and 1/8th frame?

big_smile

Cheers

Ed


hexxed wrote:

Troy McMurray is gonna kick your ass

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#37 2008-07-09 7:07am

FRESSTYLE FREEK
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

not shere why you want to go back to 1" 1/18 is better but that said to go back just buy the shem that srinks stear tube down to 1" then use any 1" head set simple!wink


Kindness is like Manure does You No Good unless You spread It around
bikes were made to be pedalled if we don't ride them they get sad:(!
YES I RIDE A PINK BIKE!! WANT TO MAKE SOME THING OUT OF IT!

2017 heavyweight build off entry submission thread link
http://bmxmuseum.com/forums/viewtopic.p … 0#p5846730
Don't get butt hurt when someone posts their opinion to an open forum.

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#38 2008-07-10 1:02am

Dr.Robotnik
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

FRESSTYLE FREEK wrote:

not shere why you want to go back to 1" 1/18 is better but that said to go back just buy the shem that srinks stear tube down to 1" then use any 1" head set simple!wink

Thanks for your reply but I am after a kit that allows you to use a 1" steerer tube in a head tube set-up for 1 and 1/8th". I have not been able to find anything on the web.

You see I have a Basic frame with a 1 and 1/8th" headtube and I can get some Basic forks which have a 1" steerer tube which were made at the same time and I was wondering if I could fit them together or if I am barking up the wrong tree.

I was imagining some sort of tube that threaded onto a 1 inch steerer tube shimming it out 1/8th of an inch...hmm


hexxed wrote:

Troy McMurray is gonna kick your ass

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#39 2008-08-04 1:37am

xeokym
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

this topic is great!! I'm all about mixing old with new school! I love it!smile


§~MY RIDES~§ 08 SE retro repro black 20" PK Ripper, 08 SE retro repro tan 20" Quadangle, 00 Haro Shredder, 99 Haro Master 2010 SE retro repro 20" gold PK Ripper, and hopefully soon 26" SE/DC yellow 26" Quadangle.

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#40 2008-09-25 9:31am

erichevy
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

Has anyone tried this along with using a Gyro (or similar)?  I have been thinking about the threadless fork option for an old school frame because of the 990 mounts and stem options... I wasn't sure if you could run a rear detangler though.  Any thoughts???  Thanks.


"I majored in punk rock" - Mike Watt

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#41 2008-09-25 9:53am

SCIVIC94
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

the actual spinner part for 11/8 and 1" gyros are the same.i have a frame that is 1" with a 1" threadless setup.i made an adapter to use 11/8 stem and the upper gyro plate.works great.cables lineup beautiful.so go for it.just pop on the upper plate and your set.

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#42 2008-09-25 11:23am

BridgeCity
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

Dr.Robotnik wrote:

You see I have a Basic frame with a 1 and 1/8th" headtube and I can get some Basic forks which have a 1" steerer tube which were made at the same time and I was wondering if I could fit them together or if I am barking up the wrong tree.

I was imagining some sort of tube that threaded onto a 1 inch steerer tube shimming it out 1/8th of an inch...hmm

you are talking about using 1 inch threaded forks in a newschool 1 1/8 headtube frame, right?

until they start manufacturing the special cups again, you will have to make your own cups. 1 inch cups with material added so they fit the 1 1/8 headtube. you can see the quad freestyler in my bikes for an example, but you'll need machining skills to complete the task.

 

#43 2008-09-25 11:56am

FRESSTYLE FREEK
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From: Fountain Valley, CA
Registered: 2007-06-28
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

Dr.Robotnik wrote:

FRESSTYLE FREEK wrote:

not shere why you want to go back to 1" 1/18 is better but that said to go back just buy the shem that srinks stear tube down to 1" then use any 1" head set simple!wink

Thanks for your reply but I am after a kit that allows you to use a 1" steerer tube in a head tube set-up for 1 and 1/8th". I have not been able to find anything on the web.

You see I have a Basic frame with a 1 and 1/8th" headtube and I can get some Basic forks which have a 1" steerer tube which were made at the same time and I was wondering if I could fit them together or if I am barking up the wrong tree.

I was imagining some sort of tube that threaded onto a 1 inch steerer tube shimming it out 1/8th of an inch...hmm

like I said I can go to my local mountain bike store thay make a shem that press is in to your 1 1/8 stear tube like a bearingrace to shrink the over all size down to 1"  size head sets cup size so you can run 1" forks! but any good bike shop should cary it or could posibly order it.


Kindness is like Manure does You No Good unless You spread It around
bikes were made to be pedalled if we don't ride them they get sad:(!
YES I RIDE A PINK BIKE!! WANT TO MAKE SOME THING OUT OF IT!

2017 heavyweight build off entry submission thread link
http://bmxmuseum.com/forums/viewtopic.p … 0#p5846730
Don't get butt hurt when someone posts their opinion to an open forum.

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#44 2008-09-25 12:41pm

BridgeCity
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

haven't we discussed this at length in some thread. the pressed shim is for 1 inch standard, not 1 inch bmx.
i'm not going to say anymore on the subject as it would distract from the point of this thread.

 

#45 2008-09-25 1:23pm

FRESSTYLE FREEK
Pro Member(fantstik Spellr)
From: Fountain Valley, CA
Registered: 2007-06-28
Posts: 15441
Bikes: 62

Re: How To Convert 1inch Threaded To 1 1/8 Threadless

BridgeCity wrote:

haven't we discussed this at length in some thread. the pressed shim is for 1 inch standard, not 1 inch bmx.
i'm not going to say anymore on the subject as it would distract from the point of this thread.

when i bought two sets of the shems it was because I hade to 1 1/8 freeagent alloy pro XL frames and was not yet ready  or had the money to buy a new 1 1/8 fork ,headset and stem to use in the two used freeagents I bought for dert cheap.  short story made longer I got the shems and ran a older redlinne 1" fork in one and a GT fork in the other. the head sets I used whear a GT FSA and a Tioga beartrap. and no thay where not mine BMX model/style head sets but full size pro 1" frame head sets! so mabey there was more than 1 size 1"shim?

Last edited by FRESSTYLE FREEK (2008-09-25 1:28pm)


Kindness is like Manure does You No Good unless You spread It around
bikes were made to be pedalled if we don't ride them they get sad:(!
YES I RIDE A PINK BIKE!! WANT TO MAKE SOME THING OUT OF IT!

2017 heavyweight build off entry submission thread link
http://bmxmuseum.com/forums/viewtopic.p … 0#p5846730
Don't get butt hurt when someone posts their opinion to an open forum.

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#46 2008-09-25 2:07pm

BridgeCity
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

oi vay, you are pulling me in. go to chrisking.com and check the ID of bmx and 1 1/8 head tubes. do the math and you'll find the proper shim would be .5MM thick.  they don't make shims that thin as they'd be destroyed during installation.

i have no clue what you purchased, would have to see it and do the caliper measurements.

 

#47 2008-11-03 10:13pm

Chillwag
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From: Vancouver, WA
Registered: 2008-09-28
Posts: 61
Bikes: 2

Re: How To Convert 1inch Threaded To 1 1/8 Threadless

http://bmxmuseum.com/forums/viewtopic.php?id=90825
I'm looking at making cups to fit BMX frame sets (not the !' fork but the frame) use integrated bearing sets.

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#48 2008-11-08 9:13am

samfenna
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From: Wirral, England
Registered: 2008-10-25
Posts: 161
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

so all thats been done is the 1 1/8 crown/steerer race has been used in a 1 inch headset?

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#49 2008-12-02 1:20pm

TOP JIMI
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From: Dayton, Ohio
Registered: 2008-10-10
Posts: 143
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

What brand of 1 1/8th" forks are being used with the 1" Old School cups. Not all of the modern forks will work. So I need to know what brands of forks that will work with the old 1" cup and bearing set up. Thanks.


Need A Harry Leary Turbo Fork

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#50 2008-12-02 1:41pm

BridgeCity
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Re: How To Convert 1inch Threaded To 1 1/8 Threadless

I've not run across a standard 1 1/8 fork yet that didn't work, assuming the race had the proper taper.
What feature of the fork makes you feel like it won't work?
If it's the race, you can remove and replace the race with a different one such as has been mentioned earlier in the thread.

 

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