The Bare Frame and Fork Weight Thread

tedsbikes
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Re: The Bare Frame and Fork Weight Thread

Postby tedsbikes » Tue Mar 07, 2017 1:31 pm

Speedway (made in Adelaide) c.1930 -
bare metal before refinishing.

Frame 2211gm

Fork 724 gm

Total 2935 gm

stucad
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Re: The Bare Frame and Fork Weight Thread

Postby stucad » Fri Mar 24, 2017 5:06 pm

I see your reference to Pete Corbin being a custom bike builder. I recently picked up a steel framed Pete Corbin from my local Op Shop for $5. It has Mavic MA2 wheels and Campag front and rear derailleurs. The bike is very light and has some quality about it. I am in the process of restoring it and would love to know a little more of it's history. Google is almost silent on Pete Corbin. Is there any information you could give me about him and his bikes? Thanks.



ironhanglider wrote:Early 80's(?) Tandem frame 531 Tandem tubing - 5kg

As far as I can tell it is a custom build by Pete Corbin from Sydney. Forgot to weigh the forks - sorry. They are also 531 Tandem tubing. The previous owner reckons that it was 1996 however the 126mm rear spacing and the top of BB cable guides suggest otherwise to me. Possibly NOS at the time.

Cheers,

Cameron

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Re: The Bare Frame and Fork Weight Thread

Postby Torana68 » Sat Mar 25, 2017 6:07 pm

[quote="stucad"]............... Is there any information you could give me about him and his bikes? Thanks.

probs a real good idea to start your own thread rather than mess up the frame weight thread...... :D
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Re: The Bare Frame and Fork Weight Thread

Postby Lots of steel bikes » Sat Mar 25, 2017 7:46 pm

Torana68 wrote:
stucad wrote:............... Is there any information you could give me about him and his bikes? Thanks.

probs a real good idea to start your own thread rather than mess up the frame weight thread...... :D

and we would all like to see photos of your bike.

stucad
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Re: The Bare Frame and Fork Weight Thread

Postby stucad » Sat Mar 25, 2017 8:26 pm

Apologies if I have posted in the wrong thread, I am new to forums and only acme across this from a Google search. I am happy report that, based in some advice from some Facebook retro groups, I have met witn Kerry Hopkins, who, it turns out, is the original builder of the frame. He built frames for Pete Corbin, who had a shop over Sutherland way, in the 80's and 90's. I am meeting again witn Kerry next week to look at the bike and work out some replacement parts. I am. Era exvited to have met the builder and am very happy that I will be able to restore the bike, and know some of its history.

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find_bruce
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Re: The Bare Frame and Fork Weight Thread

Postby find_bruce » Mon May 22, 2017 10:41 pm

Tange aero dynamic "Castle cycles" - unknown maker 52 st, 54 tt

Frame 1,960g

Fork 700 gm

Total 2,660 g
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Re: The Bare Frame and Fork Weight Thread

Postby QuangVuong » Mon May 22, 2017 11:49 pm

54cm? Did I measure it up wrong? Will it still fit you?
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P!N20
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Re: The Bare Frame and Fork Weight Thread

Postby P!N20 » Tue May 23, 2017 12:07 pm

^^ What's that seatpost?

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find_bruce
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Re: The Bare Frame and Fork Weight Thread

Postby find_bruce » Tue May 23, 2017 12:33 pm

QuangVuong wrote:54cm? Did I measure it up wrong? Will it still fit you?
Size is perfect Quang - basically the same as my shogun. 54 was the top tube - you said 53 centre to centre, I just checked & it is probably 53.5.

Seat tube I measured 52 cm centre to top - you measured 50 cm centre to centre, so same same.

P!N20 wrote:^^ What's that seatpost?
Suigno Aero Mighty 19.2mm x 31.5mm, length =190mm giving ~60mm adjustment, 232g - looks like a 26mm tube that has been pressed to a tear drop shape

Photos of a similar post on fleabay
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Re: The Bare Frame and Fork Weight Thread

Postby P!N20 » Tue May 23, 2017 12:48 pm

^ How's the fit? My DA AX seatpost doesn't fit all that great in the Tange seat tube - eg; gaps all around. I had to stuff some cut up inner tube in there and tighten the bejesus out of the grub screw...also impressed you have a clamp set up.

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Re: The Bare Frame and Fork Weight Thread

Postby find_bruce » Tue May 23, 2017 12:57 pm

Seems to fit well, but the real test will be when I get it built up & some weight on the seat. I thought you might be interested in the aero, & will start a new thread when I have some photos.

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Re: The Bare Frame and Fork Weight Thread

Postby QuangVuong » Tue May 23, 2017 1:18 pm

There's a few different aero seatpost shapes around. Columbus Air with its own Columbus seatpost, then Tange Aerodynamics with three different shapes(round, and two different ovals).

This is called the E type.
Image

This is the sharper oval shape called the C type.
Image

Asher(a.davis12) prob can tell you even more about the different types.
http://www.fixed.org.au/forums/showthread.php?t=32379
Last edited by QuangVuong on Tue May 23, 2017 1:36 pm, edited 1 time in total.
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P!N20
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Re: The Bare Frame and Fork Weight Thread

Postby P!N20 » Tue May 23, 2017 1:34 pm

The mystery is what happened to the A-type - was it just the same as the B-type?

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singlespeedscott
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Re: The Bare Frame and Fork Weight Thread

Postby singlespeedscott » Tue May 23, 2017 6:51 pm

P!N20 wrote:The mystery is what happened to the A-type - was it just the same as the B-type?

Image

A type was your standard round insert with an aero top shaft
Image

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Re: The Bare Frame and Fork Weight Thread

Postby P!N20 » Wed May 24, 2017 8:45 am

singlespeedscott wrote:A type was your standard round insert with an aero top shaft


OK then, what was the B-type?

Velobase lists the B-type (SP-7310), C-type (SP-7320) and E-type (SP-7322), so where is the A-type? And how did it differ from the B-type which looks round to me (despite the catalogue scan saying it was 'semi-oval'.)

I know Velobase isn't without its errors, but even if the B-type listed is actually the A-type, that still begs the question what was the B-type? In other words, there are three known types, but four in the catalogue, where is the fourth?

I also know catalogues differed from actual production, so maybe they just canned the semi-oval job and called the round seatpost the B-type.

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Re: The Bare Frame and Fork Weight Thread

Postby find_bruce » Wed May 24, 2017 9:53 am

We seem to be drifting away from frame weights.

As you say Velobase is good, its not god. Looking at the catalogue photo of the 3 posts, I see standard round with fluting, round insertion with aero top and oval insertion with round top. I haven't seen a 7300 standard round seat tube with or without fluting. The way I read it is
  • 7300 A-type - standard round seat post - ie round all the way
  • 7310 B-type - round insertion, semi oval aero top
  • 7320 C-type - tear drop insertion, round top
  • 7322 E-type - oval insertion, round top

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Re: The Bare Frame and Fork Weight Thread

Postby P!N20 » Wed May 24, 2017 10:37 am

^ Good point, back to frame weights. See here for further inane AX discussions.

tedsbikes
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Re: The Bare Frame and Fork Weight Thread

Postby tedsbikes » Sat Jun 24, 2017 3:33 pm

Cinelli 1984 SLX tubing

Frame 1913 gm
Fork 669 gm

tedsbikes
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Re: The Bare Frame and Fork Weight Thread

Postby tedsbikes » Tue Jun 27, 2017 2:18 pm

Colnago 1970s 56cm

Frame 1953gm
Fork 721gm

DD
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Re: The Bare Frame and Fork Weight Thread

Postby DD » Mon Jul 23, 2018 5:07 pm

Hi Folks,
Im trying to get infomation on my fathers Speedwell track frame and fork from his youth, i was told it was a 1938 speedwell gold cup track bike.
I read a few years back that all gold cups had serials starting with a G, mine being G28285.
Overall weight of forks and frame are 2770g including lower steering cups on forks.

Some pics below
Any information would help.

Thanks
Dave

Image
Image
Image

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Re: The Bare Frame and Fork Weight Thread

Postby Torana68 » Mon Jul 23, 2018 9:32 pm

There is a Speedwell thread here , find that and post there . Answers will follow:)
viewtopic.php?f=23&t=96584&hilit=Speedwell+appreciation
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thecraig
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Re: The Bare Frame and Fork Weight Thread

Postby thecraig » Thu Jul 26, 2018 11:13 am

Picked up an old Mittaga (Adelaide Brand).

Tubing - Oria .8 (Presumably Hi -ten)
54cm sq

Frame - 2250gm
Fork - circa 700gm

Craig

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Re: The Bare Frame and Fork Weight Thread

Postby cage » Thu Jul 26, 2018 6:09 pm

Well that's interesting. My Mittiga frame which is bigger weighs 2.09gm.

ST 57 c-c
TT 56 c-c

Unfortunately no forks with this one.

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Re: The Bare Frame and Fork Weight Thread

Postby uart » Thu Jul 26, 2018 6:33 pm

cage wrote:Well that's interesting. My Mittiga frame which is bigger weighs 2.09gm.

ST 57 c-c
TT 56 c-c

Unfortunately no forks with this one.


Yeah that does seem unusual, to have a larger frame in the same tube set to weight that much less. I wonder if there is a measurement error involved or perhaps some (or all) of the BB included in the other measurement. (Or is it possible that just the headset cups could make that much difference?)

Still, 2.09 kg seems pretty good for a "Hi Ten" frame, a lot lighter than my crmo repco superlite frame. That's going to come in well under 3.0 kg with any half decent fork.

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Re: The Bare Frame and Fork Weight Thread

Postby thecraig » Sat Jul 28, 2018 3:33 pm

cage wrote:Well that's interesting. My Mittiga frame which is bigger weighs 2.09gm.

ST 57 c-c
TT 56 c-c

Unfortunately no forks with this one.

Image

Image


You got me thinking and I went back a reweighed with a better scale and you are spot on - 2050gms for the frame.

Interestingly, your colour scheme is the exact opposite of the one I have. Mine's white where yours is black and visa versa. Same decals though.

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