Choosing the Right Frame Size

SimonC

Finding my (electric) wheels
Aug 12, 2009
11
0
Having lurked here for a while, it's time to de-lurk as I'm just starting the process of finding the right e-bike!

I've spent a pleasant couple of hours each at Inno-Cycle and at Cycle Heaven in York looking at Wisper, Gepida and Gazelle. Although each of the bikes I've ridden has been very good from the e-propulsion point of view, I've met a common problem with each of them: frame size. I'd welcome from advice from forum members.

The problem is that I'm 5'10'' but with long body and short legs. If I do the standard inside leg based calculations I come out with an indicated frame size of 19''-21''. However, I find that on a 19'' frame I'm too close to the handlebars and on a 21'' frame I have the seat right down and still my toes don't touch the ground when seated.

The advice I received when I was younger was that one should be able to touch the ground with both big toes simultaneously when seated on the bike - and so I've got used to a style of starting and stopping that assumes that. However, is that still received wisdom? The design of many current bikes appears to place the bottom bracket so high that this is not possible if one sets the saddle height to get appropriate knee extension.

Advice welcomed both on riding style and on e-bike brands that may accommodate my body shape!

Simon.
 

Straylight

Esteemed Pedelecer
Jan 31, 2009
650
2
I agree that the bike should adapt to suit you, rather than the other way around. In this regard, I'd like to say that my Wisper 905se is the best bike I've ever ridden, the short frame with a resonably long seat stem make it easy to adjust for a variety of leg lengths, and the adjustment on the handlebars means that it can accomodate differing body lengths. I find that with the saddle set correctly for the pedals, I can still (just) reach the ground with both feet.

Oh, and welcome out into the light, from lurking in the shadows btw :D
 

Mussels

Esteemed Pedelecer
Jun 17, 2008
3,207
8
Crowborough
Bottom brackets are higher on mountain bikes and if the saddle is correctly positioned you probably can't touch the floor with your toes. I can almost stay on the saddle with one foot down when I'm wearing cycling shoes as they are stiff enough to go on point like a dancer, otherwise I stop by a kerb.
I find the Wisper 905 frame slightly small as the saddle is at it's highest setting and the bars feel too close even when pushed right forward. I'm about the same height as you so the saddle would be fine but the frame may not be long enough.
 

simonbarnett

Esteemed Pedelecer
Dec 26, 2007
338
25
West Hampstead, NW London
I've a similar height and short leg. I had an Agattu with a 49cm frame plus sprung post which was close to perfect on it's lowest setting- 49cm is just over 19". I changed to a ProConnect S which has a 50cm frame (about 19.7")with no sprung post and is perfect allowing a bit more adjustment. So for a roadster style (not Wisper which are different) I'd go for the 19" and then you can raise or spring to suit you.