DIY bike fitting

[lph]

Hm.

Oh, I forgot to say - I use the same mtb shoes on all 3 bikes too.

[velogirl]

Heel on pedal is a very outdated methodology. With a huge variety of pedals and shoes available these days (with different stack heights), it's not a particularly accurate method to use.

Because of varying fork and seat post rake/angles, the most accurate way to set up multiple bikes would be to match the angle at the knee and hip at the DBC and 9:00 positions. This would be done with a goniometer.

Lorri

[divingbiker]

Because of varying fork and seat post rake/angles, the most accurate way to set up multiple bikes would be to match the angle at the knee and hip at the DBC and 9:00 positions. This would be done with a goniometer.

My guess is that someone doing a DIY bike fit doesn't have a goniometer sitting around.

[SouthernBelle]

My guess is that someone doing a DIY bike fit doesn't have a goniometer sitting around.

Isn't yours in the drawer in the kitchen with the spatulas?

What the hell is a goniometer?

[OakLeaf]

It's what you use to measure your gonies

[OakLeaf]

Sorry. Joint angles. Like, how far are you bending at the hip, what is the range of motion of your knee, etc.

It's been 18 years since I first heard that word - I knew what one was but I never bothered to look up what the word actually meant - and it just clicked. "goni-" as in poly-gon. Duh.

[lph]

heh-heh. I can see myself approaching my dh saying "Hi, honeeeeyyyy - would you like to measure my gonies tonight?" I've been waving measuring tape around all week as it is.

But my problem was really this: I'd like to compare the distance from where I sit to the bars (both vertical drop and horisontal reach) on all my 3 bikes, to see how different they are (or aren't). But measuring from the saddle is a bit tricky, as the saddles are different lengths, and I don't sit on them the same way. But can't I assume that if each saddle is fitted in the same way*, each saddle, or more precisely, my actual sitting point, will have the same vertical and horisontal distance from the pedal on each bike?

In that case I can use the pedal, or bottom bracket axle since all my cranks are the same length, as a starting point instead of the actual saddle.

(*in my case knee-over-pedal-spindle and heel-on-pedal-plus-a-little)