his seat tube fuckery was really for “maximum dropper size insertion” without doing the super-steep effective STA cheat that the other progressive builders use and then pitch as its own feature with incorrect explanations
unfortunately PVD is right about this and it is indeed an “All-Road” concern to get a road bike’s q-factor and saddle position for nontechnical pedaling
all those connections from various angles just makes the BB shell look…needy.
and as he keeps using longer and longer droppers he’s running out of space for the cable exit and actuator so he’s getting ready to go right out the bottom
Am I crazy for liking not maximum dropper sometimes? I kinda like having the seat somewhere near me so I can locate it with my thigh/knee.
I leave about 10 cm showing so I don’t buzz my butt.
the seat-tube-ahead-of-the-BB is for super-short 405mm chainstays with a 29x2.1" rear tire. And like Fred mentioned, keeping it straight instead of bending it to join at the BB (like most mountain bikes do) is to keep it straight as long as possible to allow for the longest-stroke dropper post imaginable.
The drop yoke is so he can run a road-1x chainline (because road-Q crankset and 142mm rear end) with that width tire and those short chainstays. absolutely nowhere for that chainstay to go other than down with that tire/chainstay/crankset/chainring combo.
peering at the spec print T47 BB? PVD finally admitted that threaded BBs are fine???
Paragon stopped making the PF ones he was using but for some reason he won’t machine his own.
DQ: is it necessary to have a seat tube for seatpost rigidity?
What if there was a seat tube positioned in front of the (seat post mount tube) ala @drwelby ’s double bb? The purpose of this would be to get the absolute maximum tire clearance
Are these actually bikes one could buy or does he just make weird things then argue on the internet about them?
NGL my next bike will prob be RAL 6005
i.e. could you have a collar at the seat cluster and a socket below, and use the chairpole itself?
you know the answer and no you can’t buy one.
I’ve considered doing this but the weight savings isn’t worth the extra fabrication on any bike with a dropper that long
Who is the Tarcker that has the Yamaguchi with the S-bend seat tube? @akasnowmaaan ?
do you really want to talk to him though?
the wise man’s game would be to order your own custom lomg frame from Marino, I’ve been considering that to prototype my lefty bikepacking frame idea
I think once some asshole makes 300mm droppers this might be worthwhile, to have the lower seattube segment piercing the DT with a v-brake noodle routing the cable into it
a steel 35mm ID tube would be pretty heavy, and you’d “just” hacksaw out the middle of it, and use three seatpost collars
