I’ve never used the Periscopa, but the Dirt Drop was OEM on the MB-1 and designed for mountain bike use, I think. It’s stout.
More than that, it also gets the bar higher than any other Riv-offered stem (at least, the 10 cm model does) with its 190 mm quill and upjutter extension. I used a 10 cm to get Nitto Noodles up nice and high and comfortable on a 48 cm (c-c) mountain bike with level tt and very low stack; there was IIRC 3-4 inches of usable quill remaining in the steerer. I take a 60 c-c road frame in “fistful of post” sizing. Lastly, I think it looks better than a gooseneck with 12” of quill exposed. And even more lastly, it’s very well made and quite pretty. >From the Riv web page: For maximum bar height and comfort, and especially if your bike is just too damn small for you, this should solve your discomfort problem. Originally designed to make drop bars work on too-small, too-longa-top tube mountain bikes, and was original equipment on the 1987 Bridgestone MB-1. Our top choice for Albastache or Moustache Handlebars, since they work best with a tall and short stem. In 80 or 100mm extensions, both with a 22.2 quill. The quill length is 190mm Approximate Dirt Drop rise from min insertion to center of hbar clamp are as follows: 8cm - 168mm rise 10cm - 178mm rise On Fri, Sep 26, 2025 at 10:51 AM '[email protected]' via RBW Owners Bunch <[email protected]> wrote: > hi, all. > > there is a family of stems referred to as the "dirt drop", usually > designated with MT-10 or MT-10DX (i think the DX indicates a duller silver > finish vs a shinier silver finish). > > there is a separate family of stems referred to as the "periscopa", > sometimes designated with FU-82 or FU-82DX. > > both famililes are "forged aluminum", according to the nitto catalog. > assuming i found a stem amongst them that seemed an appropriate size and > shape, why would i choose one family over the other? is there some > particular non-size non-money reason to avoid a periscopa? (in my > experience periscopa stems are cheaper, but not in a "lugged nitto vs soma > shotwell" way.) > > Yours, > Thomas Lynn Skean > > -- > You received this message because you are subscribed to the Google Groups > "RBW Owners Bunch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion visit > https://groups.google.com/d/msgid/rbw-owners-bunch/ffd07dda-78d9-4091-9e4e-81dbf2637929n%40googlegroups.com > <https://groups.google.com/d/msgid/rbw-owners-bunch/ffd07dda-78d9-4091-9e4e-81dbf2637929n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- Patrick Moore Alburquerque, Nuevo Mexico, Etats Unis d'Amerique, Orbis Terrarum ------------------------------------------------------------------------------------------------------- Executive resumes, LinkedIn profiles, bios, letters, and other writing services ------------------------------------------------------------------------------------------------------- *When thou didst not, savage, k**now thine own meaning,* *But wouldst gabble like a** thing most brutish,* *I endowed thy purposes w**ith words that made them known.* -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/rbw-owners-bunch/CALuTfgvieKbsZ%3DzvXuoF95hr-rGyRbNMSGX-7iwKh_dKPYj2yA%40mail.gmail.com.
