seat post and handlebar stem

mycam8u2 · #1 (**permalink**) 05-14-2009, 11:50 PM

my seat post measures 1 inch and my stem meas. 7/8. just wondering what the metris fquivalent is on those..also when measurind the handle bar do i measure the tube or the actual part that fits inside the stem? thanx for any help

Finfan · #2 (**permalink**) 05-15-2009, 12:12 AM

One inch is just over 25mm, 7/8" is just slightly over 22mm.

motorhedfred · #3 (**permalink**) 08-23-2009, 08:54 PM

Remember the number 25.4 Divide millimeters by 25.4 to get inches. Multiply inches by 25.4 to get millimeters. Remember, inches must be converted to decimals. Example.....

1 1/8" = 1.125 inches 1.125 times 25.4 = 28.575 28.575 millimeters

33mm divided by 25.4 = 1.2992125984251968503937007874016 for all intents and purposes 1.3 inches

Kevlarr · #4 (**permalink**) 08-24-2009, 12:32 AM

AAAAKKKKK! MATH!

I just use Online Conversion - Common Length Conversions

restapukin · #5 (**permalink**) 08-25-2009, 07:35 PM

yeah, if anyone's interested, an imperial lathe (with it's orig imperial gearset) is well able to cut near-enough metric threads - i can't remember the tolerances except to say that no further investment on gearing would be required for pretty much any motorcycle work at all - the 'near enough' tolerances of an imperial lathe/std gearset turn out to be very very close indeed in theory & well and truly close enough for real-world practical purposes...

just in case anyone's thinking of buying an engineer's lathe

heck of a lot of milling ops can be done on the lathe too...

innit .... anyhow....

bandito · #6 (**permalink**) 08-25-2009, 07:42 PM

Whats the Imperial system? Sounds like sumtin to measure the queens boobs with. In American its called S.A.E

restapukin · #7 (**permalink**) 08-25-2009, 10:22 PM

Imperial measures - feet, inches, M.P.H. pounds, ounces; ....

Metric measures - grams kilos; millimetres, centimetres, metres

pretty mainstream stuff...

the world went metric a long time ago

The british isles dragged their feet...

The U.S. are still dragging their rear quarters you might say.

Swimming pools are the exception in the states, i have heared...

restapukin · #8 (**permalink**) 08-25-2009, 10:32 PM

must be a load of old lathes going cheap around the north east 'states

Main thing to check would be the main head bearing... but i'm a rank amateur thinking used car used bike used lathe ... & all day to fool around