Alan Frame
Gnu
- Location
- Lost In Space
In my day it was for the sake of a measly 3.2 mm, whatever that is in feet and inches.
Is there a shim to convert a 31.8mm front mech clamp for use on a 28.6mm tube?
- Thread starter Cyclopathic
- Start date
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In my day it was for the sake of a measly 3.2 mm, whatever that is in feet and inches.
Pumpkin the robot
Guru
3.175mm not 3.2mm
Alan Frame
Gnu
- Location
- Lost In Space
9mm
OP
OP
Cyclopathic
Veteran
- Location
- Leicester.
Quite. I realized this when I was measuring the relevant tubes with my vernier calipers.
OP
OP
Cyclopathic
Veteran
- Location
- Leicester.
I won't quibble over 1/40th of a mm3.175mm not 3.2mm
I hate that they have not devised a way to make my vernier calipers display fractions when I'm using the Imperial setting. How the hell am I supposed to know what 0.25 of an inch is. I mean, really.
Pumpkin the robot
Guru
Are you using vernier calipers or digital calipers? Depends on the type of job you do as to whether 1/40th of a mm makes a difference!
OP
OP
Cyclopathic
Veteran
- Location
- Leicester.
Is there a job on a bike where 1/40th of a mm makes a difference? An appreciable one that is. I think normal temperature fluctuations would make this level of tolerance a nonsense on a bike. Certainly the fluctuations in my workshop.
I am using digital vernier calipers. A perfectly acceptable and much used term, therefore correct.
If they are much used, like the term, then maybe you need to check their accuracy with a new set of slip gaugesA perfectly acceptable and much used term, therefore correct.
Pumpkin the robot
Guru
Is there a job on a bike where 1/40th of a mm makes a difference? An appreciable one that is. I think normal temperature fluctuations would make this level of tolerance a nonsense on a bike. Certainly the fluctuations in my workshop.
I am using digital vernier calipers. A perfectly acceptable and much used term, therefore correct.
No such thing as digital vernier calipers! Pet hate of mine, I think everyone at work calls them that because they know it winds me up!
Well, if it is any consolation as a 55 yr old, I had not appreciated the imperial relationship.
Cubist
Still wavin'
- Location
- Ovver 'thill
They aren't better, but as they were the unit of choice when the industry standards were established, they continue to be relevant. Once people insist on converting not only to decimals, but also to a different (metric) measurement, so decimals become more complicated as you need to ensure consistency. If a tube is measured to 1"3/8 it's precisely that. Convert the measurement twice and watch the discussions on tolerance and acceptable number of decimal places bloom!
Cubist
Still wavin'
- Location
- Ovver 'thill
You can have a lot of fun with unit comparison/conversion too. I remember one maths teacher getting us to calculate the speed of his Austin 7 in furlongs per fortnight.
OP
OP
Cyclopathic
Veteran
- Location
- Leicester.
He must have been a hoot at parties.
OP
OP
Cyclopathic
Veteran
- Location
- Leicester.
If everybody calls them that then I think there is an argument for their existence. Consensus is how we arrive at the usage of words. If it gets used enough and put into print there's a good chance the O.E.D. will include it in their publication as a perfectly cromulent word. Would you rather be French with their Acadame Francaise or whatever they call it?
