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Messages - Yogidave

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Road Bike Frames, Wheels & Components / Re: Spcycle SP-053D Disc Road Bike Carbon Frameset
« on: December 14, 2022, 02:12:46 PM »
I strongly considered one of these, but found you did not offer the bar/stem sizing I needed to fit your size XL - I needed a 440x100. I found your frame to be too long horizontally to comfortably fit. Otherwise, it was a top contender.

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Road Bike Frames, Wheels & Components / Re: Frame Sizing Confusion!
« on: December 14, 2022, 02:09:41 PM »
Done!

Pulled the trigger and ordered a Yoeleo R11 size 59. They have zero offset posts available and will provide an assortment of spacers. Their integrated bar/stem sizing works. Semicustom painting without an upcharge!

Great communication and they offered me a 15% off coupon!

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Road Bike Frames, Wheels & Components / Re: Frame Sizing Confusion!
« on: December 13, 2022, 01:08:00 PM »
Methodology:
1. Over time.... looking at geometry charts on websites.
2. I started with straight up comparison of "stack/Reach" but that wasn't giving me the detail I felt I needed.... So... I built some equations that use trigonometry to precisely calculate stem and spacer impacts, saddle position, etc to fit. (bikes are all triangles, so this is basic middle/high school maths). Thank you Pythagoras! Make an functional equation once, and then copy it to 60 other rows to get the same metric for each frame. Basically, I calculated an "imaginary" stack and reach at the same STACK point in imaginary space and compared ALL frames to that (I did this to figure out which frames, stem lengths and stem spacers would match). This is EXTREMELY precise to the millimeter and compensates for differences in seat and headtube angles.
3. Defined algorithms to calculate a "fit" ranking (based on geometry vs current/past bikes I've owned) and a "value" ranking (based on cost, warranty, weight, etc). This is very personal. For instance, I de-prioritized weight over fit since i'm not racing and am, myself, 182cm and 86kg. I'm going to sweat out more than 100gr on a warm 60 minute ride.
4. Defined an "overall" ranking based on some math I tweaked several times to aggregate the FIT and VALUE ranking.
5. Sort, group and filter. Shockingly, the tool works very well to group into "top choices" , "maybes" and "no-go" groupings.
6. This is all pretty important since a lot of frames are now coming with one-piece integrated bar units that can't easily be swapped. You need to get it right BEFORE you spend $1000USD! For instance, My highest scoring frame, Tideace FM-R053-D that includes an integrated bar, needed a 100mm stem length x 44 CM bar width to fit, but the DO NOT offer that.. only 110mm x 44cm. The next size would have needed 60mm of spacers under the stem, so this one is OUT.
7. Communicate with Manufacturers ... turns out some frames the show on their sites are not available for various reasons. This further prunes the list.

And, lastly........

8. I'm a total dork and I realize this.

Sharing? it started in XL, but since I use a mishmash of PC and Mac, I moved it to Google sheets so I can access it from anywhere. It's sharable, so I guess I could..... I'm happy to if there's a safe way to do this.

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Road Bike Frames, Wheels & Components / Re: Frame Sizing Confusion!
« on: December 12, 2022, 11:56:47 AM »
I currently ride a Masi CXRC size "57", which is technically a Cross/Gravel bike. However, Prior to that, I had a Willier Izoard XP size "XL/58".

I currently have a spreadsheet with some 60 possible frames worth of "data" and find that depending on the brand, I'm a "56" or a "59".  In a lot of cases, the stack/reach can be very similar across bikes. I wrote a few simple algorithms in XL to score the "fit" of these based on some specific criteria and then sorted by score and eliminated frames or sizes that, on paper, are clearly far away from a good fit for me.

For instance, within Yoeleo, I am considering the R11 in size "59" and the R12 in size "56". accept fo rht estack (and what would result in stem spacers to nearly match bar height), these are "equivalent".

I have absolutely used geometry geeks - it's an invaluable resource.

I'm just wondering if anyone has any wisdom to share about how they analyzed the mountain of geometry data as it relates to Chinese Carbon Fames.

It's almost time to spend money, so I'm doing all my diligence.  ;D

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Road Bike Frames, Wheels & Components / Re: FM619
« on: December 11, 2022, 08:04:21 PM »
I communicated with them through the AliExpress messenger...

I'd do that to confirm they have your size and color. They are responsive.

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Road Bike Frames, Wheels & Components / Frame Sizing Confusion!
« on: December 11, 2022, 10:47:14 AM »
I can't be the only one here... I am shopping for a new road disc frame. I'm awesome with spreadsheets and looking for something more on the "endurance road" geometry.

To me, this means a relatively HIGH value to Stack/Reach. for instance, if you want an endurance fit with a reach of 395, and endurance ratio could be like 1.48. This gives a Stack of 585. (it's the MATHS!)

I'm 182cm tall with a 87cm inseam.

So, in many of the brands discussed here (Yoeleo, Miracle, Elves, OG-EVKIN, Carbonda, etc). buts me in either a "56" or a "59", neither of which is consistent across, or even WITHIN a brand. And, if you go by their sizing recommendations, I'd be riding a 53!

I've been riding and racing longer than most of these companies have existed.

So, how is everyone else picking their size on their CHINER frames?

Thanks,
Dave

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