I've considered a similar DIY shim for my quill to threadless adapters using a leftover piece of 1-1/8 threadless steerer tube (25.4 I.D.) to take up the space and then use alloy 1-1/8 alloy shims over that. Ideally it would have a 22.2 inner diameter as someone noted above to ensure a proper fit but never got around to trying it since I ended up changing the build before it came to that anyway.
I have both VO and Soma adapters. The VO with the radiused lower lip has a cleaner look as long as the threadless stem has a 40mm stack height to exactly match the available clamp space and then sits flush with the top. The VO is one piece with solid top counterbored to take the quill bolt and requires no top cap.... this makes stem changes very easy when dialing fit since you could just leave the adapter in place and pull the threadless stem with ease. The Soma is MUCH taller and has a hollowed out top and loose stem cap. The Soma also has no lip on the bottom of the clamp area so the stack height of the threadless stem is a little less important (still should be in the ~40mm range however) and gives you more flexibility to center the stem on the available clamp area of the adapter. So any clamp overhang would only be exposed on the bottom of the clamp and top is covered by the cap vs the exposed overhang on top on the VO version. Because you need to install the threadless stem onto the Soma before inserting the quill (the long bolt compresses the top cap and quill wedge simultaneously) it makes stem swaps a little more cumbersome vs the VO version and just not as convenient for swaps while dialing in fit with new bars. I agree they are not aesthetically pleasing but considering the convenience I've learned to appreciate them for short term experimentation and keep 'em around just in case. If I happened to need to use one long term for any reason I'd likely try to shim it out for a smoother transition from headset top cap but as long as they only serve a temporary purpose I've abandoned any further thoughts of shimming the quill part. But in think my prior idea would work even though there would be excess space between the 22.2 quill and 25.4 ID steel tube shim because the radiused lip of the VO and tapered transition of the SOMA should keep the shim centered and stop it from slipping once everything is tightened down (I hope.) Brian Cole Lawrenceville, NJ On Monday, January 22, 2018 at 9:29:02 AM UTC-5, Matt C. wrote: > I have had this idea to make a stem cap that allows you to use a quill > bolt. Then you could use a threadless adapter+threadless stem as one quill > stem and just use spacers to cover the ugliness. Does anyone know if such a > stem cap exists? Or perhaps a bolt that would work with the normal stem cap? > > I have been thinking of using this set up on my Burley tandem. It has a 1 > 1/8" threaded fork. > > Matt Cook > Bristol RI > > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at https://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
