1 inch steerer conversion forks

[Brad]

Can we make a list of the purpose built one inch steere conversion forks that have been made and marketed.

Kogswell Konversion fork *

Soma Grand Randonneur one inch fork.

Soma Champs Elysees  Low Trail chromed fork with wide crown

(both canti and "700c" without braze ons.)

Crust Spark rando fork

Please add to the list based on your knowledge or experience.

* discussed at length on iBob list. Sleeved crown to reduce from 1 1/8 to 1 inch.  

[Coal Bee Rye Anne]

Just to clarify:  Are you looking specifically for low trail/long offset 650b conversion forks only or more or less just a comprehensive list of potentially still available 1" replacement forks?  

I recall Soma offered 2 versions of Grand Randonneur replacement forks - the Ivory canti 1" threadless version and more recently the green 1" threadless disc thru axle version (which is showing out of stock but still on their site.)

I recently emailed Soma to inquire about potential restock of their 1" threadless Classic Curve CX/Trekking fork as well as the Tange Prestige lugged CX 1" threadless canti fork... Note that these are 700c canti forks and both out of stock (9/8" threadless remains available) but wasn't sure if they are discontinued or potentially being restocked at some point.  Currently awaiting response.  I have a potential fork swap where I'd like to increase overall tire clearance and gain the canti posts plus rack mounts on a previous sidepull 27" to 700c conversion and then use the long threaded sidepull fork on as a threadless fork on a smaller loaner bike (rather than buy new for the loaner that won't see much use) but still just trying to see what fork options I have within the 385-390mm axle to crown range.

I didn't ask about any further restocks of their Champs Elysees thinking they still had several stocked but now see many options are listed but unavailable right now.

Crust also still offers the 1" threaded Romanceur disc 12mm thru-axle forks with 386mm axle to crown.

[Coal Bee Rye Anne]

Velo Orange also previously sold some surplus 1" Polyvalent forks through their garage sale section (both blue canti models and green disc models from a prior 1" threaded disc model) so some of those may still be out there.  I had one of the blue canti versions in a ~240mm steerer with 65mm offset held in reserve but with no immediate project in sight I traded it away for something more immediately useful.

[William Lindsay]

Crust sells a Lightning Bolt fork now

Rivendell has often had lots of extra forks, and at times sold them separately and at other times made unique one-off batch frames to fit the forks under their Rosco Bubbe model name.  Some of those have been 650B, and virtually all of them have been 1" steerers.  They don't have any on their website now, but it's well known that if you suspect they may have something that you are eager to buy, call them and see if they can scare something up.  

Bill Lindsay

El Cerrito, CA

[njh...@gmail.com]

SJS (Thorn Cycles) in the UK have a few 1" steerer forks on their website.

Nick Payne

[Joe Bunik]

1" versions of the low-trail (in both canti and sidepull?) forks
intended for the Electra 'Ticino' line were widely available as
separates at one point.

Joe Bunik
Walnut Creek, CA

On 11/10/23, njh...@gmail.com <njh...@gmail.com> wrote:
> SJS (Thorn Cycles) in the UK have a few 1" steerer forks on their website.
>
> Nick Payne
>

> --
> You received this message because you are subscribed to the Google Groups
> "650b" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to 650b+uns...@googlegroups.com.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/650b/29db6fda-254d-4787-a81d-5b61dffe9008n%40googlegroups.com.
>

[Brad]

I suppose that disc brake ready forks should be on the list, but under a different heading.

I have one of the Polyvalent forks in reserve, too.

On Friday, November 10, 2023 at 12:48:29 PM UTC-5 Coal Bee Rye Anne wrote:

[Ken Freeman]

I can't sell you or make you a fork, but I can share something I learned when commissioning a fork for my Trek 610.  I wanted to keep all my original angles, so 73 degrees head, and I selected a really big offset, to get a trail of 65 or so millimeters.  The builder said we had to take care to keep the frame level, because several cm had to be added to the fork blades to support the frame at the same height front and rear.  This was extra work in the CAD system, but the bike has been a really good ride.  I've rarely actually used it as a front-bagger, but it's a very nice ride anyway.

This required a change of brake - the original Shimano 600 model were mediums and too short.  I found one of my Mafac Racers was long enough, so I used that.  Probably the straddle geometry was not optimum, but the braking was fine, typical old Mafac, which I have liked since the late 1960s.

Good luck!

Ken Freeman, Ann Arbor, MI USA

--

You received this message because you are subscribed to the Google Groups "650b" group.
To unsubscribe from this group and stop receiving emails from it, send an email to 650b+uns...@googlegroups.com.

To view this discussion on the web visit https://groups.google.com/d/msgid/650b/2fcf7ab7-097f-4ccd-acfc-a5df6902d750n%40googlegroups.com.

--

Ken Freeman
Ann Arbor, MI USA

[Brad]

So we should probably add builders who have built custom conversion forks which have worked for riders to the list.  One builder whose name escapes me had a web page about the fork issue.   This was also noted by people close to a decade ago who were re-raking forks in the Pacific Northwest. 

[Ken Freeman]

Yes Brad, I agree.

The one you cannot think of might be Tom Matchak, who works in New England.  He wrote a few articles about designing the fork for steering geometry AND for fork crown "ride height."

To view this discussion on the web visit https://groups.google.com/d/msgid/650b/ba441e7f-7825-42ff-9003-138ebe3f26b7n%40googlegroups.com.

[Chris Cullum]

On Fri, Nov 10, 2023, 20:41 Joe Bunik <jbu...@gmail.com> wrote:

1" versions of the low-trail (in both canti and sidepull?) forks
intended for the Electra 'Ticino' line were widely available as
separates at one point.

Didn't those have some crazy offset figure like 8.0cm? The Ticino had a super slack headtube, like <70°?

Joe Bunik
Walnut Creek, CA


On 11/10/23, njh...@gmail.com <njh...@gmail.com> wrote:
> SJS (Thorn Cycles) in the UK have a few 1" steerer forks on their website.
>
> Nick Payne
>
> --
> You received this message because you are subscribed to the Google Groups
> "650b" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to 650b+uns...@googlegroups.com.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/650b/29db6fda-254d-4787-a81d-5b61dffe9008n%40googlegroups.com.
>

--
You received this message because you are subscribed to the Google Groups "650b" group.
To unsubscribe from this group and stop receiving emails from it, send an email to 650b+uns...@googlegroups.com.

To view this discussion on the web visit https://groups.google.com/d/msgid/650b/CADqphP1%2BN38qWf1ajwLW%3D_3vnkmsDNYe2t-%3DEELJ99AznSQHnQ%40mail.gmail.com.

[Chris Cullum]

On Sat, Nov 11, 2023, 04:43 Brad <riendeau...@gmail.com> wrote:

I suppose that disc brake ready forks should be on the list, but under a different heading.

Does anyone actually make a disc brake fork with a 1" steerer? Maybe Crust? Can't think of any others.

--

You received this message because you are subscribed to the Google Groups "650b" group.
To unsubscribe from this group and stop receiving emails from it, send an email to 650b+uns...@googlegroups.com.

To view this discussion on the web visit https://groups.google.com/d/msgid/650b/2fcf7ab7-097f-4ccd-acfc-a5df6902d750n%40googlegroups.com.

[Brad]

The Ticino replicated frame geometry from the 1920's and before.

[Brad]

The Thorn replacement forks are very interesting. 

From their website "- Reversible brake bosses allow either 700c or 650b (584) rims"

But alas they are 1 1/8"

They also do not appear to have much rake.

https://www.sjscycles.co.uk/forks/46-700c-650b-thorn-mer853vc-steel-fork-green-imron/?geoc=US

[randal...@gmail.com]

Crust has made a couple different ones. There was also a European brand that had one but I can't recall right now.

Soma currently has the V3 Grand Randonneur fork available - 1" threadless disc brake 12mm thru axle.

I have in my notes that they previously offered the chromed Champs Elysees fork in 1" threadless disc QR but it seems to be out of production for the time being.

Randy Daniels

Rome, GA

[rswatson]

The Ticino forks were indeed 80mm offset, for a "plush retro ride" I believe they said ;-)

Tire clearance left a bit to be desired. They were threaded but with a very long unthreaded portion.

I had a  both a 1" and a 1-1/8 at one point. 

I think I still have one of them. 

Ryan

To view this discussion on the web visit https://groups.google.com/d/msgid/650b/CAGAMt97J98eN%3DsWNLO%3DcF%3DBZYuQVBJPezGbObE98i%2Be4z8b8WA%40mail.gmail.com.

[Greg Walton]

I rode a Ticino and the ride was indeed plush. Upon closer inspection, I found out why — the fork blades were small diameter and they had a nicely executed, graceful curve. I don’t know how Electra pulled it off, in that same period most production steel forks had beefy blades and often a dog leg curve. 

I was so impressed that I bought one of the forks, although never built it up. Here’s a photo comparing it to a another low trail fork from the same era.  Look at that dropout, it really is a thing of beauty. 

Greg Walton

Seattle

To view this discussion on the web visit https://groups.google.com/d/msgid/650b/24512c3f-1026-4500-86b1-8e26d699fd2b%40edison.

[daxo potato]

oh man, that's beautiful! double eyelets too. wow.

there's a guy in Germany who has half a dozen listed on eBay. they are described as 1 1/8" threaded. even as a lover of many obsolete things, that's going too far. if they were 1" though, I'd probably buy 3. want to sell yours Greg? 

dave in ny

To view this discussion on the web visit https://groups.google.com/d/msgid/650b/CAP6n7r%2BLeNN6fdt1x0biJ_ee0asWSV%2B0WKB4Ay4zeEbG0SvpFQ%40mail.gmail.com.