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how do NJS bike size

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how do NJS bike size

Old 08-10-17, 05:00 PM
  #1  
Ziyi
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how do NJS frames fit. njs size

Hi bike fans
I'm posting because I came across a real question.
I've been riding kilo tt for 2 years as daily commute and really fancy how track bikes ride on road. But my kilo is a bit too big for me and I decided it's time to replace it. I'm 5'6 girl, short torso, long legs and arms. My kilo tt measure top tube 52.5cm and seat tube 53cm. The seat tube height is perfect for me. I even have my seat post set higher so my legs have all the rooms they need to be the most effective. However the length of top tube makes it too long of a reach... ( honestly 52.5cm is not even that long on tracks but I prefer shorter tt). I currently have a riser to compromise for the uncomfortable reach, which I'm not a fan of.

After tons of research I've set my eyes on NJS frames to be my replacement.

How accurate is NJs measurement? I got my kilo tt from bike direct, it says 50cm top tube center to center on the website but it actually measures 52.5. (Yes, I do know their different measure system about c-c and c-t but no it didn't measure 50cm c-c but 52.5cm).
Does anyone here have experience with njs frames? How do their top tube measure. I can do a seat tube 50cm-53cm but it's very rare to find a top tube within 52cm in that range...
There are a few I'm interested. One is top tube 51 c-t and 52- c-c, one is 49.5 c-t and 50 c-c.
Would it be a bad choice to go with second one and set the seat post super high? I think 52 c-c might still be too long for me.....

Help a leggy girl out lol!!!

Last edited by Ziyi; 08-10-17 at 05:06 PM.
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Old 08-10-17, 05:37 PM
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seau grateau
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Best way to go is probably to contact the seller and ask for precise measurements, ideally with ruler/tape measure photos, of the dimensions you need. NJS frames probably aren't going to have a geometry chart you can look at.
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Old 08-11-17, 10:15 AM
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Originally Posted by Ziyi View Post

Help a leggy girl out lol!!!












Shorter stem?
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Old 08-11-17, 04:13 PM
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i have two njs frames (bridgestone, vivalo) advertised 52cm. The top tube for both is measured 52 centre to centre with a 48cm and 49cm seat tube respectively. I'm 5'7 and they both fit like a glove. I don't mind having a shorter seat tube, with a high seat post as the tt fits like a glove with a 80mm stem.
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Old 08-11-17, 05:24 PM
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Ziyi
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Originally Posted by acoustophile View Post
i have two njs frames (bridgestone, vivalo) advertised 52cm. The top tube for both is measured 52 centre to centre with a 48cm and 49cm seat tube respectively. I'm 5'7 and they both fit like a glove. I don't mind having a shorter seat tube, with a high seat post as the tt fits like a glove with a 80mm stem.

It's helpful to know that the measurement is accurate!
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Old 08-12-17, 07:42 AM
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Something seems to gone wrong with this forum so I will attempt to get it back on the right track...

Sup?
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Old 08-12-17, 09:06 AM
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Only if in Japan & racing for money bet on you does NJS matter.
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Old 08-13-17, 06:42 AM
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Don't listen to fietsbob. If you want an NJS frame, get one. I have two. They are awesome. Hand crafted, well made, and beautiful to look at.
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Old 08-13-17, 06:51 AM
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Is NJS a certain factory that made a bunch house brand frames or something?? I see this term used a lot but never really understood what it really was.
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Old 08-13-17, 08:06 AM
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NJS is just a stamp of approval for the Japan Keirin Association. They basically regulate bike racing in Japan and in order to level the playing field they have requirement for bikes/parts so there is a guarantee of sufficient quality and that no rider will gain any exceptional advantage because of the bike itself.
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