The Thread about Nothing....
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The Thread about Nothing....
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mrkott3r
The Thread about Nothing....
either that or just pretend your this poor bastard.....
http://www.youtube.com/watch?v=NKt4EhTXrCI
thats the one I was looking for!
A fair few remixes of it out there. I heard the kid was suing the school/kid that taped it.
I dunno why the kid became an internet celebrity
matagi
The Thread about Nothing....
internal caliper:
http://www.ruler-manufacturer.com/rimages/244/diving-caliper-HM-03-S.jpg
Now you've done it! Mr Matagi likes those. :(
miyata610
The Thread about Nothing....
OK, I've tried two seatposts off my two steel bikes, both 1984, a Miyata and an Apollo MTB.
Both have very similar seat posts made by Laprade, the Miyata is 26.8 and the Apollo is 25.8. It says so on the post.
The unknown frame is somewhere between, so 26.0 26.2 26.4 or 26.6, duh.
Trying to measure the ID at the lug is pointless, it's cutaway for the integrated clamp and it has some distortion due to use etc.
The internal micrometer looks neat, I like buying tools that I only ever use once :) .... hmmmm, a visit to the tool shop :D
62vette
The Thread about Nothing....
You need the calipers, your local engineering store is waiting for you :D
I've taken a few days off to ease the shock of another birthday, so I went for a good long ride today. 135km across to Lake Rotorua and back round via the coast, with (thank <insert deity here>) a tail wind on the way home. About 40 of the first 60km were a gradual uphill with a few 10%-ish killers chucked in for good measure. My quads hate me now.
I tried out the Keywin (http://www.keywin.com/crm.htm) pedals today. Pedalling wise they do the job the same as any pedal, but no sore feet which I get from the LOOKs (http://www.roadbikereview.com/cat/drivetrain/pedals/look/PRD_97408_2503crx.aspx), and no squeak. Good pedals, although the cleats make your shoes like ice skates on a smooth surface.
Thylacine
The Thread about Nothing....
You need the calipers, your local engineering store is waiting for you :DMy Verniers have both an internal and external feature. Everyone should have one. (Actually, they belong to the missus!). The frame will either be a 26.8, 27.0 or 27.2 I'd be guessing, Matagi. I'm also guessing the LBS has crappy posts in those sizes just lying around so you can test em all out.
I've taken a few days off to ease the shock of another birthday, so I went for a good long ride today.Sounds like a good plan. 8 days til I'm a whole 35 years old myself.
I know, I come across as much younger, huh! :rolleyes:
matagi
The Thread about Nothing....
My Verniers have both an internal and external feature. Everyone should have one. (Actually, they belong to the missus!). The frame will either be a 26.8, 27.0 or 27.2 I'd be guessing, Matagi. I'm also guessing the LBS has crappy posts in those sizes just lying around so you can test em all out.
Now you have me confused, if a 25.8 seatpost is too small and a 26.8 is too big, how does the frame end up 27.0 or 27.2. :confused:
Anyways, not about to make a special trip to the shops (60km round trip from here) so if we can't improvise a way of measuring, we will have to wait until we venture out of the cave again. :)
531Aussie
The Thread about Nothing....
My Verniers....:hey Thylo, here's another chance for you to flex your knowledge :p
Bike #1 has a 73.5 degree seat-tube angle and a 57.5cm top tube.
Bike #2 has a 72 degree STA and a 57cm top tube.
with the saddle rails approx 74cm from the BB, how much further
back from the head-tube is the saddle on bike #2?
jock.c
The Thread about Nothing....
Ok, just to plunge Jock into the depths of despair, a serious question .....
How do I get an accurate seat tube ID on a lugged tube? Calipers don't work coz the split in the top of the tube means the very top is slightly distorted and the jaws aren't long enough to get down beyond the split.
Suggestions not involving expenditure on an expensive use once tool would be greatly appreciated.You need a deformable insert that you can remove and measure with the calipers. Tapered section of wood with a shank on the end should do the trick. The taper has to be slightly wider than the seat tube. It also needs to be lubricated with dry soap otherwise you'll never get it out again!
Bang the little bugger into the seat tube to the desired depth then remove it. Whack your calipers onto it where the taper has become deformed for the measurement. Repeat 3 times just to be sure that the wood isn't springing back into shape.
This method obviously assumes that the top of the seat tube is wider than the section you wish to measure.
No responsibility taken for bits of wood stuck in the seat tube!
62vette
The Thread about Nothing....
No responsibility taken for bits of wood stuck in the seat tube!This might be why the tube is an odd size, some other bugger has used Jock's method and had to drill it out :D
Gusboh
The Thread about Nothing....
If there is a lug there, my method might be a bit tough, but you could still get it done. Measure OD, Measure wall thickness, basic maths, viola.
Thylacine
The Thread about Nothing....
hey Thylo, here's another chance for you to flex your knowledge :p
Bike #1 has a 73.5 degree seat-tube angle and a 57.5cm top tube.
Bike #2 has a 72 degree STA and a 57cm top tube.
with the saddle rails approx 74cm from the BB, how much further
back from the head-tube is the saddle on bike #2?What do I get for a correct answer? A cracker?
miyata610
The Thread about Nothing....
hey Thylo, here's another chance for you to flex your knowledge :p
Bike #1 has a 73.5 degree seat-tube angle and a 57.5cm top tube.
Bike #2 has a 72 degree STA and a 57cm top tube.
with the saddle rails approx 74cm from the BB, how much further
back from the head-tube is the saddle on bike #2?
Not enough info. We need the position of the top tube on the seat tube. The length of the seat tube would suffice.
edit... if the seat tube is 54 the answer is zero. If the ST is 49 the answer is 0.1 approx. If the ST is 39 the answer is 0.375
(cos(73.5) x (74-x) + 57.5) - (cos(72) x (74-x) +57) where x is seat tube length.
Maybe.
matagi
The Thread about Nothing....
The answer is .... 42! :D
miyata610
The Thread about Nothing....
If there is a lug there, my method might be a bit tough, but you could still get it done. Measure OD, Measure wall thickness, basic maths, viola.
It's lugged.
On closer inspection it looks like some idiot has hammered a lump of wood in to it at some stage. :mad:
climbo
The Thread about Nothing....
The unknown frame is somewhere between, so 26.0 26.2 26.4 or 26.6, duh.
26.2mm would be the most common of those in my dealings with old frames. Find someone with a 26.2mm post and try it out.
miyata610
The Thread about Nothing....
26.2mm would be the most common of those in my dealings with old frames. Find someone with a 26.2mm post and try it out.
How about this one....
http://cgi.ebay.com.au/Campagnolo-Super-Record-26-2-Seat-Post-NIB-NOS-Campy_W0QQitemZ170015038143QQihZ007QQcategoryZ58101QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
flipper
The Thread about Nothing....
Easiest/cheapest way (apart from dropping into a shop or workshop):
http://www.ruler-manufacturer.com/rimages/244/diving-caliper-HM-03-S.jpg
....use to have one of these babies:
http://www.swissinstruments.com/internal_measurment.gif
fwooaaarrrr!!
climbo
The Thread about Nothing....
How about this one....
http://cgi.ebay.com.au/Campagnolo-Super-Record-26-2-Seat-Post-NIB-NOS-Campy_W0QQitemZ170015038143QQihZ007QQcategoryZ58101QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Campag, can't go wrong ! :)
matagi
The Thread about Nothing....
http://www.swissinstruments.com/internal_measurment.gif
You'd have trouble getting that down a 26mm hole though.
It's a bore guage, right?
Gusboh
The Thread about Nothing....
It's lugged.
On closer inspection it looks like some idiot has hammered a lump of wood in to it at some stage. :mad:
Or an ill fitting seatpost...
There should be a vertical gap in the lug for the clamp to compress. Use the gap to measure wall thickness.
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