I have been searching the forums for awhile looking for a link to a reference for NJS bike specs. I thought I looked at them before but I may be remembering schematics from a builders site. Any ideas?

Thanks

vjp

i'm sure tomity can explain alot of these, but from what i know / understand some specs are

loose ball bearings for the pedals, bb and headset
steel frames
araya gold tubulars

I am actually looking for specs for frame angles, tube dimensions etc., if they are specified, not certified parts.

Thanks

made out of quality steel, check
300% price increase because of a little stamp, check

there you go! enjoy your new njs parts!

This is pure recollection, but I seem to remember someone posting a keirin frame with aero steel tubes. Apparently it's allowed, although it never caught on in a meaningful way. Sort of like fillet brazing, I believe.

are u talking about the peloton with apparent filet brazing over lugs?

bridgestone anchor is like 75.3 and 75.5 on head and seat, rake is probably like 30mm. they have the angles on their site but i'm not sure which year they are for.

300%? Not even close, hater. I find most NJS parts and frames to be quite reasonable. $1200-1300 for a basic frame, $150 for Sugino 75 cranks, $100 + for pedals etc etc. Steep, yeah, but super well made, classy, good looking, what else do you want? Don't forget they're all manufactured in Japan, so you're paying that "wealthy nation premium", esp with the weak dollar. They're also distributed in relatively small numbers, so you're paying higher shipping costs and overhead (?) as well.

Yeah, they cost, but they nice.

I am not debating NJS monetary value I am interested in Bike design and want to find out the specs that are applied to a Keirin frame and fork.

300% would be imposed by US importers.
Buying NJS parts in Japan and building your bike is about the cheapest way you can go.
My bike is 95% NJS because of that reason.
All the non-NJS parts werent cheaper and often much more expensive.

man i got called a troll for posting an njs post

do'nt worry, this thread isn't any better

i don't think there are specs for frame geometry.. keirin builders seem to vary this a lot..
tubing i assume has to be the traditional 25.4/28.6

i think your question has to be 'what does it take to become an njs certified builder ?'

like someone said, tomity probably knows this

Well they all vary from frame to frame, depending on the rider/builder. I have had tons of frames, and all have very different dimensions all round. angles, tube diameters, tube lengths, track end widths, fork styles, seat stay styles, fillet brazing, lugs.
I do not understand what you want to know really....