New 2019 frame geometry charts up on RBW's website

[Chris L]

I was just looking at the Gus geometry charts and noticed all of the bikes are updated with 2019 charts.  The biggest changes I noticed were in the bikes I might be interested in purchasing, the Atlantis and the Appaloosa, and the sizes have changed on both.  I would have ridden a 56 Atlantis and a 55 Appaloosa and now I'm guessing I would ride a 55 Atlantis and a 54 Appaloosa, although no S.O. heights are listed on those two.  

The 55cm Atlantis is now a 700c bike with a much longer top-tube and slacker head angle/longer rake.  Sounds interesting and I can't wait to see one.

[Bill Lindsay]

Atlantis preorder is available also. Maybe there will be another run of Appaloosa coming.

Bill Lindsay
El Cerrito Ca

[Steve Cole]

Chris,

I too was interested in the new MIT Atlantis, especially the 55 cm.  While I originally thought the 59 cm would be the appropriate size (I love my 59 cm AHH), the change in geometry for the MIT Atlantis has led me to conclude that the 55 cm is the better fit.  In addition, I am more interested in a 700c than the 650b.  That said, I inquired about the geometry of the 55 cm MIT Atlantis with Riv and got this information in response:

top tube slope: 6 degrees

rear spacing; 135mm

seat tube angle: 72 degrees

head tube angle: 70 degree

effective top tube: 61cm

chainstay; 53.5cm

max tire: 2.25"

single top tube

After looking at these specs, they seemed a little inconsistent with the other, original MIT Atlantis specs and asked about this.  Grant wrote me to say: "We change, refine, improve as we go. I don't like to show geometries...for this reason. :)".

I have a 55 cm on order that will be built up soon after it arrives.  I'll post about it when I get it.

Steve Cole

Arlington, VA

[Bob Lovejoy]

And the potential future Appaloosa sizing would seem to be pretty different than the previous version, at least at first glance, most especially with relative top tube length.  I understand "just ride" but it seems harder to me than it should to keep up with the changes, especially over the years.  Studying the correct charts and making calls to Rivendell both seem well advised.  

Bob Lovejoy

Cedar Rapids, IA 

[Chris L]

I look forward to seeing your new Atlantis!

[tc]

Good eye.  Unfortunately the current Atlantis page itself still has a snip of the old geometry, which does not match the new numbers on the updated general geometries page.

Tom

[Jason Fuller]

I understand Grant's apprehension with posting geometry since Rivs fit a bit differently than most bikes so the numbers can be misleading - but reach and stack, along with standover, are key elements to determining fit, and I'm a firm believer in a proper fit being the most important element of getting a bike.  The other numbers... they could be at a "for reference only, look at your own risk" status to me 

[Keith Weaver]

I'm confused by the geometry table. I can't find PBH on the table, and standover height is blank for the Atlantis and several others. Rivendell bases frame size on PBH, why isn't it listed on this table, or am I missing something crucial?

On Tue, Nov 19, 2019 at 12:00 PM Jason Fuller <jtf.f...@gmail.com> wrote:

I understand Grant's apprehension with posting geometry since Rivs fit a bit differently than most bikes so the numbers can be misleading - but reach and stack, along with standover, are key elements to determining fit, and I'm a firm believer in a proper fit being the most important element of getting a bike.  The other numbers... they could be at a "for reference only, look at your own risk" status to me 

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[Bill Lindsay]

Keith

What's your PBH and which bike are you interested in?  I'll recommend a size for you :)

Bill Lindsay

El Cerrito, CA

On Tuesday, November 19, 2019 at 3:25:00 PM UTC-8, Keith Weaver wrote:

I'm confused by the geometry table. I can't find PBH on the table, and standover height is blank for the Atlantis and several others. Rivendell bases frame size on PBH, why isn't it listed on this table, or am I missing something crucial?

On Tue, Nov 19, 2019 at 12:00 PM Jason Fuller <jtf....@gmail.com> wrote:

I understand Grant's apprehension with posting geometry since Rivs fit a bit differently than most bikes so the numbers can be misleading - but reach and stack, along with standover, are key elements to determining fit, and I'm a firm believer in a proper fit being the most important element of getting a bike.  The other numbers... they could be at a "for reference only, look at your own risk" status to me 

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[Keith Weaver]

I'm right between 78 and 79. If I bought a new Riv, it would probably be an Atlantis. I test rode a 50 cm this summer, it felt great. They said they'd actually recommend a 47, for standover clearance, but the 50 felt comfortable for me.

If anyone has an Atlantis frame in one of those sizes, or a corresponding earlier version, I could be tempted...

But, I am still confused why I can't find PBH on that table. I have to be missing something, right?

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[Bill Lindsay]

Keith

No, you aren't missing anything.  Rivendell clearly just hasn't updated it yet on the website.  The old one is still up:  sizing chart.  They just haven't put up a new one yet.  If you dug the 50 and you felt you could stand over the 50 then definitely get a 50. 

Bill Lindsay

El Cerrito, CA

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[Garth]

On Tuesday, November 19, 2019 at 6:25:00 PM UTC-5, Keith Weaver wrote:
> I'm confused by the geometry table. I can't find PBH on the table, and standover height is blank for the Atlantis and several others. Rivendell bases frame size on PBH, why isn't it listed on this table, or am I missing something ?

The size chart is there, where it's been. On the geo page, the live links of the new and old charts are in BLUE :

Sizing and Geometry Charts - November 2019

Our newly update 2019 PBH (Pubic Bone Height) sizing chart. For older models, including MUSA Atlantis' and Homers, please reference the 2017 sizing table here.