thanks all! this consists with my unreliable barely-formed recollections.
my riding definitely qualifies as mellow. it’s not so much pavement, but all trail i’m on is likely maintained with an eye towards octogenerians and their elders. so i think i’ll get the right-sized stem that happens to be available now and not worry about the dirt drop vs periscopa dilemma. which means for me the 260mm quill 8cm extension periscopa. geometrically it should top the 280mm 7-shaped stems as well as the 225mm quill 10cm extension dirt drop (assuming the periscopa does not have a big minimum insertion difference). and it’ll keep the bar desirably close. if it snaps in two and punches a hole through my brain whilst riding to trader joe’s here in li’l ol’ suburbia-land i’ll be surprised as well as dead. note to self: do not carry six-pack of mercury in sackville barsack using periscopa cockpit. Yours, Thomas Lynn Skean who due to "n+1 cockpit disorder” is still on the lookout for a 10cm dirt drop with a 26.0mm bar clamp and a 225mm quill > On Sep 26, 2025, at 2:39 PM, Garth <[email protected]> wrote: > > Yeah, like Patrick and Joe said, it's about intended use. I bet the DD passes > a certain mtb safety test and the Periscopa does not. I think the DD is cold > forged and heat treated, the Perisacopa wouldn't be. > > On Friday, September 26, 2025 at 2:32:25 PM UTC-4 Joe Bernard wrote: >> I've used both and as Patrick inferred the Periscopa probably wasn't >> designed for singletrack use. If it's for a mellower ride it will be fine. >> >> On Friday, September 26, 2025 at 9:51:38 AM UTC-7 [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 a topic in the Google > Groups "RBW Owners Bunch" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/rbw-owners-bunch/458S3j_kP_U/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected] > <mailto:[email protected]>. > To view this discussion visit > https://groups.google.com/d/msgid/rbw-owners-bunch/73872dc6-7847-44d8-9715-b6b6736a7398n%40googlegroups.com > > <https://groups.google.com/d/msgid/rbw-owners-bunch/73872dc6-7847-44d8-9715-b6b6736a7398n%40googlegroups.com?utm_medium=email&utm_source=footer>. -- 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/BF97F433-40D1-43A7-AAC3-AA6DE8D03F04%40icloud.com.
