on 5/18/10 6:43 PM, happyriding at happyrid...@yahoo.com wrote: > My calculations show that that an 80mm Dirt Drop stem, which according > to Rivendell has a 65mm horizontal extension, is the equivalent of a > Nitto Technomic stem with a length of 8.1cm. Therefore, if you use a > 6cm Technomic stem, you can get the bars 2cm closer to you. > > The reason that is the case is because a Nitto Technomic stem has to > be raised more in order to achieve the same height as a Dirt Drop > stem, and the more you raise the Technomic stem, the more it will come > back towards you.
I'm not quite following your math (geometry?) on this. When they describe the horizontal extension as 65 mm, wouldn't that be the just 5 mm longer than a 6 cm Technomic stem? Extension is going to be the offset from the center bolt. The Technomic has to raised higher in the headtube (i.e. more stem showing) to have the bars at the same height. But, the extension is still 6 cm (60 mm). It was my understanding that the Dirt Drop and Technomic have the same quill (190 mm). Since the angle from the quill is higher, you end up with ~50-75 mm of more rise available on the Dirt Drop, before you hit max height, estimating from the images on the Riv site. So, I think that the Dirt Drop would actually allow you to be slightly closer, albeit at the tradeoff of higher bars. - Jim -- Jim Edgar cyclofi...@earthlink.net Cyclofiend Bicycle Photo Galleries - http://www.cyclofiend.com Current Classics - Cross Bikes Singlespeed - Working Bikes Gallery updates now appear here - http://cyclofiend.blogspot.com -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to rbw-owners-bu...@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
