I see...
I like "Breitlings" logo, (a company that makes watches).
"A beautiful airplane is an airplane that flies well".
Basically, I am not saying of making a franken-bike that looks hideous just because it provides some better performance, but the "beauty" on a bike is probably just the quality of craftmanship and maybe the paint.
If you think that a fixed gear bike is "pretty" you can pick one up and put it in your living room. You dont have to actually use it.
-Fixed gear bikes are impossible to provide with a "healthy" cadence of 85 to 95 rpm if there is even some sloping on the roads you will be using them. If you are commuting on a totally flat road you can pick one up with the correct front and rear sprockets and use them. (eg a velodrome). Even then they will be hard to start from 0 speed.
Less RPM with more strength damages your knees. More RPM is exhausting for no reason.
As far as the hub gear bikes, I had one and sold it.
It was really easy to maintain, as it would not require the gear cassette to be cleaned. You would only need to clean the chain and lube. It was also very practical in emergency stops as you could switch to the first gear without pedaling. But:
- The range of gears was insufficient for either high speeds, touring or climbs.
- It was mad heavy.
- The Hub is almost impossible to fix on your own once something goes wrong. (The sprocket fell off from mine and the shop sent it back to the factory and I got new hub. NOT EVEN THE FACTORY COULD FIX IT. Plus they are quite costly. A 7 speed hub like the one I had costs about 160 euro.
I kinda don't like "pretty and sweet" bikes that have absolutely no performance-oriented design. Examples would be, fixed gear in bright colors, folding bikes, multiple curved main triangle tubed cruisers, harley-bikes etc. They are a "fashion" item and a bike is not "fashion" is a machine. As said before making it "pretty" is probably done best by the quality of craftmanship and the choice of materials.
But then again, I don't go to "Bike Carnivals" etc where these bikes could maybe provide some entertainment.
If you check some older road bikes you can also see some decorated welds etc.
Is there a specific reason you find the deraileur - cassette assembly ugly?
What's a "pretty" bike in your opinion?