Stem lenghts and angles

[samsbike]

I am confused about this. Is a 100mm stem with 10degress approximately 95mm or is it an actual 100mm ie. do stem manufacturers adjust the lenght for the angle?

I think not, but just wanted to confirm.

thanks

[Mark1978]

I am confused about this. Is a 100mm stem with 10degress approximately 95mm or is it an actual 100mm ie. do stem manufacturers adjust the lenght for the angle?

I think not, but just wanted to confirm.

thanks

No a 100mm stem is 100mm middle to middle, regardless of angle.

[yostumpy]

Ah! but if you have a 100mm 0 deg stem, and a 100 17deg stem the reach will differ. IIRC my 110mm 0deg is approx 5mm longer than a 110mm 17deg when the stem is flipped upward. Likewise a 110mm stem 0 deg, will loose 5mm reach for every 5mm height spacer increment.

[Mark1978]

http://alex.phred.org/stemchart/

[samsbike]

thanks thats what I wanted to confirm

[Vaya]

http://alex.phred.org/stemchart/

A very useful programme for working out different stem combinations.

[Mark1978]

IIRC my 110mm 0deg is approx 5mm longer than a 110mm 17deg when the stem is flipped upward.

The stem itself isn't any longer when you flip it, but your reach will indeed change.