Worksman INB geometry

[One-eyed Sailor]

Greetings Rats,
I measure and draw .... for a living. I hope this info is useful to someone.
Peace!

Include metric because it's better. Bone up!

 

[One-eyed Sailor]

I forgot to label everything, these are more complete.

 

[MattiThundrrr]

Believe it or not, that's the first time I've seen actual measurements of the INB frame. That's very helpful.

 

[Wildcat]

I had one but it always felt small riding it. My inseam is only 31". It must have different geometry from the usual cantilever 18" frames.

 

[Karate Chicken Industries]

That seat tube angle seems to help the ETT stretch out a bit, but I'm left wondering how the handling is for us long inseam riders. It's borderline foot-forward and I'd have to ride one to make a properly legit determination.

 

[One-eyed Sailor]

You're right @Wildcat.
Schwinn Cruiser - Stack is about 21", Reach is about 15.7"
Worksman INB - Stack is about 20", Reach is about 15.7"
Effective top tube is about the same on both bikes at 23.5".

 

[axeman88]

That's very interesting, especially as compared to the geometry geeks frame drawing. Are frame SIZE dimensions, as cited by manufactures, C/T or C/C for seat tube?

It would be cool to be able to superimpose one frame drawing over another. A DXF library maybe?

Would you talk about how you take off the various dimensions? Do you just use sticks and a tape measure, or are laser levels or some other tech involved?

 

[One-eyed Sailor]

I'm a stick and tape measurer kind of guy.

 

[DesmoDog]

I don't think there's a standard for reporting frame sizes. Back in the day I'm not even sure if Schwinn did it the same model to model.

Tape measures will get you close enough. Keep in mind if the bike has a suspension, a lot of these are simply baseline numbers. Add springs and frame geometry becomes dynamic rather than static. They'll change as soon as you sit on the bike and the suspension sags, not to mention as it's being ridden and the suspension does it's thing.

 

[One-eyed Sailor]

I don't think there's a standard for reporting frame sizes. Back in the day I'm not even sure if Schwinn did it the same model to model.

Tape measures will get you close enough. Keep in mind if the bike has a suspension, a lot of these are simply baseline numbers. Add springs and frame geometry becomes dynamic rather than static. They'll change as soon as you sit on the bike and the suspension sags, not to mention as it's being ridden and the suspension does it's thing.

You could be right Desmo, I always assume C-T, usually close to reported frame size.
I'm a semi-retired carpenter and am used to working in 64th's of an inch but for my purposes I eyeball most dimensions on a bicycle. (I wish we would all just agree on the metric system, porra!).

Good points about suspension bicycles. I cheat a little and use floor-to-axle on some dimensions (BB drop), obiviously this involves tire size and air pressure at that moment. I started out using a Stabila level to get accurate reach and stack dimensions, for example. Decided it's not worth the hassle and this info is for my own purposes anyway.
I'm still new at this, if I mess up let me know.