Thanks for all the opinions and insight so far everyone. Bob, I have to agree and I think your previous rabbit hole venture confirms the frame is highly likely to be a 650B-ified Toyo Atlantis.
It feels a bit strange to have an Atlantis that can't fit a 2.1 tire... but maybe there's some advantage to keeping it 650B? On Sunday, April 5, 2026 at 3:43:47 PM UTC-4 [email protected] wrote: > Should read "double eyelets *at* the fork dropouts,…" > > On Sunday, April 5, 2026 at 1:42:06 PM UTC-6 Bob wrote: > >> Re: 650B Atlantis >> >> I once spent too much time digging through archived RBW materials ( >> https://notfine.com/rivendell/) and archived rivbike.com webpages (on >> archive.org). So far as I can tell, the pre-MIT 650B Atlantis was made >> by Waterford in 2016–2017. The earliest reference I found in this group is >> a post by Bill Lindsay on December 2, 2016 ( >> https://groups.google.com/g/rbw-owners-bunch/c/keexAOoYrrA), which >> includes a photo of an Atlantis. The earliest dated mention on the RBW site >> I found is in the May 2017 geometry chart ( >> https://web.archive.org/web/20170602082329/https://www.rivbike.com/pages/geometry). >> >> The first archived instance of the 650B Atlantis on the model page is July >> 4, 2017 ( >> https://web.archive.org/web/20170704052849/https://www.rivbike.com/collections/framesets/products/atlantis). >> >> This is also the brief, shining moment of the 650B Hunqapillar, which I >> sadly seem not to have noticed was available until after it no longer was. >> >> Bill's photo and the photos on the archived model page from 2017 show >> mid-fork braze-ons for a front rack, double eyelets and the fork dropouts, >> and a kickstand plate. Many photos I've seen of the Toyo-era Atlantis do >> not have the mid-fork bosses, and some do not have double eyelets at the >> dropouts. Seems like you have a 650b-ified Toyo Atlantis. >> >> -- >> Bob >> >> On Sunday, April 5, 2026 at 9:10:10 AM UTC-6 Jamie D. wrote: >> >>> I have what I believe to be a 56cm Toyo Atlantis: >>> >>> • The serial number is AT0299. >>> >>> • The frame measurements match the geometry chart. >>> >>> • It has the curvy chain stays. >>> >>> • The lugs look to be the style used on Toyo frames. >>> >>> Imagine my surprise when I go to put my brand new, fancy 26" wheel set >>> into the frame and something looks off... the canti posts look too high. I >>> go and grab a brake caliper to check and it's confirmed, too high for 26" >>> wheels (sigh). I then put a 650B wheel in and the brake caliper lines up >>> correctly. >>> >>> Since the frame has also been repainted, I'm assuming a previous owner >>> had the canti posts moved for 650B wheels. >>> >>> The fork clearance horizontally inside the fork and in the chains stays >>> where a 26" tires would go is 65mm. With a 26" wheel in the fork, the >>> vertical clearance is 65mm from the top edge of the rim to the bottom edge >>> of the fork crown. With 650B wheel in the fork, the the vertical clearance >>> is 52mm from the top edge of the rim to the bottom edge of the fork crown. >>> >>> My impulse is to get the canti posts moved back into the original >>> position and repaint. I got good deal on the frame, I'm hoping this will be >>> a "forever bike" and it will be fun to choose my own color. >>> >>> Do you agree that the canti posts have likely been moved? Is there any >>> reason not to move them back other than the cost of moving the posts and >>> repainting? >>> >>> >>> >>> >>> -- 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 [email protected]. To view this discussion visit https://groups.google.com/d/msgid/rbw-owners-bunch/9fb69501-6a30-419e-a519-7a991464ff19n%40googlegroups.com.
