Bicycle Mechanics - Difference beween Shimano 2300 and Sora 3400?

Forum search says this hasn't been discussed, so. . .

Besides one is 8 and the other is 9, anyone who has the chance to play around with both of these beasts can tell me if theres any real difference between the two (materials, fit, finish, ect. . .) From pictures on he web, they don't look exactly the same, but pretty close.

One noteworthy technology difference is that 2300 uses a square-taper spindle, whereas Sora uses an integrated spindle and outboard bearings. If you compare them component-by-component, 2300 will also have more stamped-steel parts and a steel outer chainring, and I don't think a 2300 brake even exists. Also, if you happen to be planning on a compact double crank (34-50 rings), I don't see a compact version of 2300, but Sora does have that option.

One noteworthy technology difference is that 2300 uses a square-taper spindle, I actually was completely unaware of that. That's pretty significant.

Shimano components progress in a numerical hierarchy including the components that are not part of any particular group. The Sora having a higher numerical value would be up the scale in fit, finish and overall ease of use. Aside from that - quality is relative and depends on the intended use. No point buying more than you'll use just because its a 'better' product. You'll have to use some discretion.

Right. I understand their naming conventions. . . They seem pretty close, pricewise, as well. That's why I was asking for specific examination. I suppose next time I'm in a shop (after I forgive them for "lying" I know they have a mess of bikes with either group I can examine.

Also Shimano doesn't claim a weight for either.

Right. I understand their naming conventions. . . They seem pretty close, pricewise, as well. That's why I was asking for specific examination. I suppose next time I'm in a shop (after I forgive them for "lying" I know they have a mess of bikes with either group I can examine.

Also Shimano doesn't claim a weight for either.

So maybe you should post what your actual concern or interest is all about.

Most bikes (except very high end models) combine components from several groups and sometimes from different companies as well . And the reason you`re even vaguely interested in a weight comparison between two of Shimano`s bottom ranking groups escapes me. The reason Shimano doesn`t post weights against these components is because they`re not considered competition grade components so weight is incidental.

The notation about square taper BBls also isn`t necassarily any reflection of quality. Shimano make some high end square taper BB`s which you then have the option to buy. However - the notion of a lbrifter` from either of those groups leaves me personally very unenthusastic. There`s a limit to how much reliable technology you can buy for a few dollars.

I found what I wanted via the tech docs

I actually was completely unaware of that. That's pretty significant.

Why?

New JIS square cranks seem to be an endangered beast, but apparently they still live at the very low end of the spectrum. That increased the number of known options available by 50%.

I see the OP found his answer, but just in case some one else searches for this thread, here is my 2 cents. Even though both groups are similar in terms of materials used, I've never been quite satisfied with the build quality of 2300. Everything seems more plasticky somehow, I'd rank it barely above Tourney(High-end walmart group) in how smooth and enjoyable it is to use. Perfectly adequate, but 3400 beats it out by a wide margin. Sora is not really all that much more expensive, and it just feels like a real road group. Granted, it's still very basic, but at least it comes across as a well thought out simplicity, rather than an attempt to save every penny. BTW, this is coming from my experience building and selling bikes equipped with both groups, and I've owned a bike with Sora.

Everything seems more plasticky somehow, I'd rank it barely above Tourney(High-end walmart group) in how smooth and enjoyable it is to use. Yeah. That.

Overall, though, your response is pretty much spot on with what I was looking for (along with what I found in the tech docs). In summary (of the tech docs) Sora (3400) has more in common with 4500 than 2300. I'm stuck with 2300 shifters (due to 8 in the back and, I already have them), but I'm on 3400 derailleurs.

I bought my Specialized Allez Steel Double as a starter road bike, to determine if I wanted to make the move from a hybrid to a road bike. It came with Shimano 2300 components, paired with downtube shifters. I wouldn't want to have 2300 components on a better quality bike, but I only paid $399 new for my bike. The setup on my bike is so simple that it never needs adjustments. I just get on it and ride.

My next road bike will have a carbon fiber frame and better components, but I enjoy riding my bargain basement priced bike.