Go Back  Bike Forums > Bike Forums > Classic & Vintage
Reload this Page >

1974 Torpado mixte

Notices
Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

1974 Torpado mixte

Old 06-23-22, 04:57 AM
  #1  
oneclick 
Senior Member
Thread Starter
 
Join Date: Feb 2020
Posts: 1,960
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 734 Post(s)
Likes: 0
Liked 769 Times in 466 Posts
1974 Torpado mixte

Just arrived - a frame, fork, wheels, and brakes. This was one of those deals where shipping was more then the bike.

I know it's a 1974:



It's nothing special as far as a frame; weights are 2835gr and 770gr, and the seat tube measures 51cm from crank centre to the middle of the seat lug.
It came with Normandy hubs laced to unbranded steel 27" rims, they are dimpled a la Rigida, but they are not exactly the same profile, the spoke bed looks a little more curved.
The front is hollow, the rear solid.
There's a dirt-shadow that matches the outline of a Simplex front mech.
There are a lot of little braze-on guides for the cable housings, no stops - the housings run all the way.
For a 48-year-old bike it looks pretty good.
The patch on the fork is the worst bit, the chainstays underneath show slight flattening and paint-wear from a kickstand.
How many different colours of silver are there...







This will get built, likely french period (or at least acceptably old) stuff, probably with 700c rims.
It will need a nice alloy front mech, a Simplex or Huret, and that needs to have a cable stop.
And a set of condorino bars would really look the business.
oneclick is offline  
Old 06-23-22, 07:06 AM
  #2  
juvela
Senior Member
 
juvela's Avatar
 
Join Date: Feb 2013
Location: Alta California
Posts: 11,923
Mentioned: 331 Post(s)
Tagged: 1 Thread(s)
Quoted: 2890 Post(s)
Liked 1,473 Times in 1,074 Posts
-----

will be fun to follow along with the build project!

dropouts are Agrati Nr. 000.8002

fork ends Agrati Nr. 000.8010

fork crown Agrati Nr, 000.8058 (used in conjunction with the "AM" pattern lug group)

bottom bracket shell Agrati Nr.000.8507

seat lug Agrati Nr. 000.8059

Viva La Torresini!

-----
juvela is offline  
Old 06-24-22, 05:45 AM
  #3  
Kabuki12
Senior Member
 
Kabuki12's Avatar
 
Join Date: Jan 2016
Location: Ventura County ,California
Posts: 2,319

Bikes: 71 Stella,72 Mondia Special,72 ItalVega Grand Rallye, 73 Windsor Pro,75 Colnago Super,76 Kabuki DF,77 Raleigh Comp.GS,78 Raleigh Pro,80 Moto Gran Sprint,82 Medici Pro Strada

Mentioned: 28 Post(s)
Tagged: 0 Thread(s)
Quoted: 535 Post(s)
Liked 1,155 Times in 688 Posts
Oh how fun! Another build , perhaps a city bike? Racks and bags.
Kabuki12 is offline  
Old 06-26-22, 06:37 AM
  #4  
oneclick 
Senior Member
Thread Starter
 
Join Date: Feb 2020
Posts: 1,960
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 734 Post(s)
Likes: 0
Liked 769 Times in 466 Posts
a little bling check - before and after

Took a rag and some washing-up liquid over the whole frame, then had a go with that and the wire brush on the plating.

Left side is before, right after (should be obvious):




From this angle you can see the pinholes (grey blot on the upper right is paint):

oneclick is offline  
Old 06-29-22, 01:29 PM
  #5  
oneclick 
Senior Member
Thread Starter
 
Join Date: Feb 2020
Posts: 1,960
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 734 Post(s)
Likes: 0
Liked 769 Times in 466 Posts
Brake modification

This frame was built for 27" wheels, but it's going to have 700s. That meant a brake with a long reach, fortunately the bins-of-stuff contained a pair of nearly new CLB RACERs.

These brakes come with a boss cast on the frame side of the bridge, one that has a pair of curved surfaces that are supposed to mate with either a seatstay bridge or a fork crown:




Unfortunately Torpado liked to put a little tube in the bridge:




So the brake bridge needed modification:

oneclick is offline  
Old 06-29-22, 01:56 PM
  #6  
alcjphil
Senior Member
 
alcjphil's Avatar
 
Join Date: Jun 2002
Location: Montreal, Quebec
Posts: 4,995
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 1392 Post(s)
Liked 972 Times in 589 Posts
back in the 1970's pretty much all the entry level Torpados I saw in Montreal were equipped with Campagnolo Valentino derailleurs.
alcjphil is online now  
Old 06-29-22, 06:37 PM
  #7  
oneclick 
Senior Member
Thread Starter
 
Join Date: Feb 2020
Posts: 1,960
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 734 Post(s)
Likes: 0
Liked 769 Times in 466 Posts
Originally Posted by alcjphil View Post
back in the 1970's pretty much all the entry level Torpados I saw in Montreal were equipped with Campagnolo Valentino derailleurs.
Nasty things - the rear, anyway. But they were ITALIAN, so they got spec'ed on the better-entry-level bikes. The real bottom (like this mixte) got Simplex.
oneclick is offline  
Old 06-29-22, 07:21 PM
  #8  
alcjphil
Senior Member
 
alcjphil's Avatar
 
Join Date: Jun 2002
Location: Montreal, Quebec
Posts: 4,995
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 1392 Post(s)
Liked 972 Times in 589 Posts
Originally Posted by oneclick View Post
Nasty things - the rear, anyway. But they were ITALIAN, so they got spec'ed on the better-entry-level bikes. The real bottom (like this mixte) got Simplex.
Valentino was the Italian version of Simplex Prestige and didn't work as well. Bottom of the line Torpados were specced with Valentino derailleurs. The lines you see on the seat tube could easily have been from a Valentino front derailleur. I would not install Simplex derailleurs on a Torpado

Last edited by alcjphil; 06-29-22 at 07:28 PM.
alcjphil is online now  
Old 06-30-22, 02:41 AM
  #9  
oneclick 
Senior Member
Thread Starter
 
Join Date: Feb 2020
Posts: 1,960
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 734 Post(s)
Likes: 0
Liked 769 Times in 466 Posts
Originally Posted by alcjphil View Post
Valentino was the Italian version of Simplex Prestige and didn't work as well. Bottom of the line Torpados were specced with Valentino derailleurs. The lines you see on the seat tube could easily have been from a Valentino front derailleur. I would not install Simplex derailleurs on a Torpado
I checked (I have some of each). It matched a Simplex push-rod exactly.

The Valentino and similar rear mechs all had the same design issue - the pivots are so short that the variation in paralellism resulting from any wear/play is much greater than mechs with wider pivots. I wouldn't put them on anything.

Current plans are for a Sach-Huret New Success, if I can re-wind the top spring so it stops binding.
oneclick is offline  
Old 07-01-22, 02:02 PM
  #10  
randyjawa 
Senior Member
 
randyjawa's Avatar
 
Join Date: Apr 2007
Location: Thunder Bay, Ontario, Canada - burrrrr!
Posts: 11,304

Bikes: 1958 Rabeneick 120D, 1968 Legnano Gran Premio, 196? Torpado Professional, 2000 Marinoni Piuma

Mentioned: 201 Post(s)
Tagged: 0 Thread(s)
Quoted: 1261 Post(s)
Likes: 0
Liked 1,359 Times in 768 Posts
This is my entry level Torpado and I love the bike. It is not wonderful to ride or use but it is fun, fun to say the least. Mine came fitted with the Valentino transmission but I chose to upgrade it to Velox, mostly for the bling factor...





I do intend to try and install a Campy Tourismo rear derailleur with hopes of using a wider range freewheel...


I also have a Valentino Extra transmission tucked away that I, presently, have no need for, in case anyone is looking for such a system...
__________________
"98% of the bikes I buy are projects".
randyjawa is offline  
Likes For randyjawa:
Old 07-01-22, 03:12 PM
  #11  
bulgie 
blahblahblah chrome moly
 
bulgie's Avatar
 
Join Date: Apr 2009
Location: Seattle
Posts: 921
Mentioned: 41 Post(s)
Tagged: 0 Thread(s)
Quoted: 534 Post(s)
Liked 906 Times in 433 Posts
Originally Posted by randyjawa View Post
This is my entry level Torpado and I love the bike.
I had a negative reaction to the first pics, the "before". Luckily I kep scrolling... what a transformation! You turned ugliness into beauty, good on ya!

Mark B
bulgie is offline  
Old 07-01-22, 05:39 PM
  #12  
oneclick 
Senior Member
Thread Starter
 
Join Date: Feb 2020
Posts: 1,960
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 734 Post(s)
Likes: 0
Liked 769 Times in 466 Posts
More metalwork today

Those cable guides needed stepped ferrules, and I didn't have any.

What's worse, net searching showed there are ones with short small sections and those with long small sections - longer is better as it helps alignment more.

Longer ones cost more, and they all would take time, unless they cost a LOT more.

So I took some bar stock and made these:




The flat is necessary:



The other three go here:

oneclick is offline  
Old 07-02-22, 02:48 AM
  #13  
bulgie 
blahblahblah chrome moly
 
bulgie's Avatar
 
Join Date: Apr 2009
Location: Seattle
Posts: 921
Mentioned: 41 Post(s)
Tagged: 0 Thread(s)
Quoted: 534 Post(s)
Liked 906 Times in 433 Posts
Originally Posted by oneclick View Post
Those cable guides needed stepped ferrules, and I didn't have any.
<snip>
So I took some bar stock and made these:
Cool! But aren't those loops intended for housing all the way from shifter to derailer?
I still like your way better though.
bulgie is offline  
Old 07-02-22, 03:08 AM
  #14  
oneclick 
Senior Member
Thread Starter
 
Join Date: Feb 2020
Posts: 1,960
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 734 Post(s)
Likes: 0
Liked 769 Times in 466 Posts
Originally Posted by bulgie View Post
Cool! But aren't those loops intended for housing all the way from shifter to derailer?
I still like your way better though.
I think they were and I tried that, but the housing I've got for it won't fit.

Plus they'd obscure the logo.
oneclick is offline  
Old 07-16-22, 06:44 PM
  #15  
oneclick 
Senior Member
Thread Starter
 
Join Date: Feb 2020
Posts: 1,960
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 734 Post(s)
Likes: 0
Liked 769 Times in 466 Posts
More metalwork, and the bars are setup

I didn't have enough threads at the top of the headset for a normal centre-pull hanger, and they are always so short that the cable outer has a sharp turn.

This one loops over the bolt that clamps the bars in the stem - it's just a bent spoke silver-soldered into a brass wingnut, tapped to M5x.08:




I needed a downtube double cable stop, so I took one of these Simplex guides:



When you drill out this rivet there is a nice square hole in the band:



I turned a pair of brass cylinders, cross-drilled the appropriate holes, filed a matching square in the ends and silver-soldered them into the band.
The plating where the new bit was to attach was removed with one of those diamond-grit "files" - they are harder than the chromium.





And here's what the front end will look like.
The grips are from a Kettler Alu-Rad, they have little red reflectors in the ends.
They were moulded for a larger diameter handlebar; I built up the existing one with layers of aluminium foil tape.

oneclick is offline  
Old 07-21-22, 02:36 PM
  #16  
oneclick 
Senior Member
Thread Starter
 
Join Date: Feb 2020
Posts: 1,960
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 734 Post(s)
Likes: 0
Liked 769 Times in 466 Posts
Complete and ready for test riding

First off, here's how that front brake hanger fits. If you look carefully you can see the circle of silver around the ends of the spoke (they go through holes in the nut's wings), and places where the zinc has boiled off the surface of the brass leaving copper behind, I'm curious how this will tarnish with time.



It's part of a rather busy front end:



Drivetrain - those are MKS AR8 pedals with AFA clips, Sachs-Huret mechs, Huret ratchet thumbshifters:



Wheels are Weinman concave on Atom hubs, brakes CLB RACER with Altenbeger levers:





Last edited by oneclick; 07-25-22 at 09:48 AM.
oneclick is offline  
Old 07-25-22, 07:04 AM
  #17  
prairiepedaler
Senior Member
 
Join Date: Aug 2016
Location: Winnipeg - traffic ticket central
Posts: 1,374

Bikes: Looking for "the One"

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Liked 211 Times in 141 Posts
Ah, there she is. Lookin' good OC!
prairiepedaler is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.