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Except for extreme cases Except for extreme cases (e.g. Dutch 83 mph streamliner, or changing rider angle for aerodynamics) smaller tires aren't going to help much. They have slightly less aerodynamic drag and slightly more rolling resistance. And, most importantly, much less selection in fast...

Not cheap. You'd need new Not cheap. You'd need new wheels, including dual drive, and probably new chain stay. Before even considering it, why do you want to change?

I'm on record as stating that I'm on record as stating that the 559 Quest is overgeared. This almost certainly isn't true for everyone, but it is for me (I think the 451 Quest hits the sweetspot in a lot of ways - gearing is just one of them). Hopefully a bigger cassette will get it down...

It sounds to me like you've It sounds to me like you've got a winner. :)

You should be very You should be very proud. Well done, sir!

The one issue to consider The one issue to consider with placing the bars that close is that it may interfere with your ability to sit up straight (which I do on steep hills and busy intersections). May or may not be important for you.

The natural frequency of the Agreed. :)

I modelled the system as two For what it's worth, this is what I would think the case is. Some people believe that the energy stored in the frame will be returned ( e.g, constructive interference), but I think that's very unlikely. They're also forgetting that if the timing is just...

I've been watching the photos I've been watching the photos as they appeared. Incredible journey. Nicely done and thanks for sharing with us!

Having a Sofrider and Having a Sofrider and a conversion, I was surprised how similar they are. The 451 Quest had the lowest seat height, so that's a plus. And I personally think that the 451 Quest is geared better (lower) than 559 Quest. I agree with Bob: I see no reason the Quest would...

The link you've provided does The link you've provided does the right thing, but just a reminder to people is that you need to figure out the load per tire to calculate the PSI in that tire. So it's not 250 lbs per tire but (say) 150 for one tire and 100 for the other... And yes, us "good...

Looks very nice.  Definitely Looks very nice. Definitely worth having the pictures in this thread! Many (some?) people won't need a headrest at that angle. I'm sure something could still be rigged up if desired. I'll be very interested in hearing about Marcel's experiences after some...

I now know where John got the I now know where John got the shape of the new Silvio seat/headrest... :D

I ride a DF folding bike to I ride a DF folding bike to the train station. It is literally a pain in my @$$. My converted bike is very comfortable. So, yes, much more comfortable. Bike Fridays are very nice folding bikes and what I would get if I wanted a DF bike. But I don't think you...