http://www.bikeforums.net/hybrid-bic...lds-steel.html

Here's another. I read these threads months ago, and just ran into them again.

I'm no expert but from what I can gather, Reynolds has a certain manufacturing process and tolerances for the size and diameters of the tubes of the bike frames. Getting a frame that has 4130 means that Reynolds did not manufacture it. So, IF the manufacturer of the 4130 used different sizes and diameters of the tubes in their 4130 frames, then there could be a difference in the 'quality' and possibly the ride of the 4130 compared to the Reynolds 520. But I would think this would have more to do with the specs the manufacturers client (Jamis) gave the manufacturer.

So, maybe a better question to ask is, did Jamis change the specs of the frames for the Coda Comp (or, in my case of interest, the Coda Sport) when they switched from Reynolds to steel manufacturer X? If yes, maybe there is a measurable difference in the 4130/520 frames. If no, then the two frames should be identical.