NJS of LFGSS

Street warrior

Upgrade day for the Samson: seatpost, saddle, pedals and straps

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sexy big boi

Oof wish I had that in my steel track days

my makino

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Classy and aggressive. Love it.

Fully sick

I've been admiring Harada-san's work inside the bottom bracket shell of my Samson. Most frames have the down tube extending to the shell, with the seat tube mitred to fit. A few have the seat tube extending to the shell, with the down tube mitred. This appears to have both tubes perfectly mitred to meet each other precisely and elegantly at the BB shell. I can't even see or feel the transition between the tubes and the shell.

Anyone else taken a close look at other NJS BB shells? I've not seen one this clean.

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The Bomber now filling the role of designated commuter, I've fomo'd into a leather saddle... It's been a pretty comfy break in en route to retro grouch-ville

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hello everyone, I'm French and it's been a long time since I posted on the forum.
Here are my two Njs, a Makino and a Giro

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'

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Not jealous at all... ;)

That Makino is FIT!

Picked this up a year or so back. Was my grail bike.

I'm a fan of the flite saddle shape. Just been so long since stripping the padding off my 90's era... By far best comfort to weight ratio out there...

Woah! Congratulations.

Local city krew.. Friday nights.. Bomber in groomed gravel/Bike path modehttps://youtu.be/j6nBm8B337s?si=-MkfNUTxsE2gGT1l

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Couple of dumb questions:

1) Are NJS headsets all the same, in terms of crown race diameter, cup diameters and stack heights? Or are they all different?
2) Are bottom brackets conventional threading and 68mm wide? Will something like a UN-55 go straight in?

Some hopefully non-dumb answers (but watch out, I may be just another uninformed chopper).

1) I've seen some ISO headsets advertised as NJS. Not seen them in the flesh, though. I had thought they would only be certified if they were JIS. Headsets should be stamped JIS (27/30) or ENG/ISO (26.4/30.2).

Stacks should be similar, but not necessarily identical. My two NJS frames have about 0.3mm difference in the amount of stack needed.

Someone had bodged ISO cups and a JIS crown race into my Makino. The dodgy interface chewed the crown and took some fixing.

2) Yes, 68mm shell, BSC/ISO thread. But always check if someone has messed your threads.

Cool, so it's just going to be a measure and see job on the headset.

Fork on the bomber is sick.

Amazing paint on this very questionable RAP

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Ways not to lock bike thread >>>>
Also that rear brake. Dildo bars. What's happening, are we back in 2009?!

I may be talking out of order and not helpful but I've owned a bunch of NJS frames and all had Hatta or Shimano headsets except for my Samson with a Chris King.

I bought the Samson used long time ago and thought it was maybe a hackjob seeing the King headset but it all appears kosher. No grinds and have inspected all of the headtube/fork races.

Long time ago I had one of those pedalroom accounts and would get constant direct messages asking how I got a Chris King on a NJS bike and the whole ISO/JIS deal.

Also have a 3Rensho with a rare Shimano headset that's not supposed to fit. But it does.

Now that I've typed all of this out, I expect every headset of mine to explode in a loose ball bearing head tube pipe bomb on the next ride.

Theoretically, any NJS frame can be made to accept any ISO headset properly, by reaming/machining the necessary surfaces to a proper diameter - headtube and fork crown. That wouldn't be considered a hack job, since those surfaces are normally machined or reamed anyway during the production of the frame, and doing them just a little bit extra is completely okay. Vice versa would not be possible, or advisable, since the diameters on the frame made to accept an ISO headset would be too large (or small in case of fork crown) to safely accept a JIS headset.

So if you see a CK headset on a NJS frame, the chances are someone modified the frame to make it accept it, which would be the only normal thing to do.