'57 Lenton Grand Prix project

Discussion in 'Vintage Lightweight Bicycles' started by bulldog1935, Mar 4, 2017.

  1. #21 Posted Mar 18, 2017

    Cruisin' on my Bluebird

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    so another afternoon of tinkering as I'm waiting on the majors to pan out - yes, I know, you're supposed to build a bike from the bottom up, but I'm keeping all this stuff out of the way.
    Routed my brake cables and even adjusted them near enough with a couple of wood blocks I use to adjust to the Synergy rims on my other bike when the wheels are out
    [​IMG]

    again, this is just a mock up of the bottom - my tap is supposed to be here in a week.
    The FD, along with the chain guard, is intentionally high right now to make room for working on the bottom end.
    [​IMG]
    But I did cable the FD and left side Huret shifter, because none of this will be in the way, and the operating derailleur lets me better see how the chain guard will finally fit up.
    But again, the chain guard can't be finally fit until the wheels are on and the derailleurs are fully adjusted.
    [​IMG]
    you Schwinn guys should like this, though Huret reads upside on the shifter band.

    Found two good places to use some 4mm brass ferrules from a handful I have around
    [​IMG]
     
    #21 bulldog1935, Mar 18, 2017
    Last edited: Mar 19, 2017
    Eric Amlie likes this.
  2. #22 Posted Mar 19, 2017

    Cruisin' on my Bluebird

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    [​IMG]
    When I removed all the parts from my wrecked '77 Grand Prix and moved most to my '74 International, I couldn't use the Esge double kickstand, because they intentionally did not leave enough room between the chainstay bridge and bottom bracket - they didn't want a kickstand on the butted Reynolds tubing. The cut stand was too short to use on my high-BB Viner, so tried some fit-ups on the Lenton.

    The problem with the Lenton is the rear derailleur cable - it's right where the clamp block for the kickstand needs to be.
    [​IMG]

    The kickstand has plastic blocks to distribute the load and protect the tubing. I had already gouged the drive-side block when it was on the 77GP to clear the ring stack bolt heads on the cyclotouriste triple crank. So I drilled and dremmeled the block to make a route for the RD cable and to fit the step on the BB lug.
    [​IMG] [​IMG] [​IMG]
    Here the blocks are in place on the chainstays
    [​IMG]

    and it works great - derailleur cable routed through kickstand.
    [​IMG]
    [​IMG]
     
    #22 bulldog1935, Mar 19, 2017
    Last edited: Mar 20, 2017 at 3:50 AM
    Eric Amlie likes this.
  3. #23 Posted Mar 20, 2017 at 6:44 PM

    Finally riding a big boys bike

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    Nice work!
    Do I assume correctly that you tried local bike shops to see if one could chase the bottom bracket threads for you?
    It's a shame to have to buy a tool that you will likely only use once, though a man can never have too many tools. ;-)
     
  4. #24 Posted Mar 20, 2017 at 6:49 PM

    Cruisin' on my Bluebird

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    Thanks - I have a lot of time to think about it.
    At this point, it's do it or not - a 1.370" 26 tpi LH tap is not too common.
    I don't know of any local bike shops with the tool. Everyone has the 24 tpi, but I already have the BB parts.
    Buying the single tap didn't cost much more than finding someone with the tap, renting/ mailing it around, etc.
    For me it's worth it.

    Got the word my hubs are being made, my rims arrived today (discounted price), so I'm just a few weeks away from riding this bike.
     
    #24 bulldog1935, Mar 20, 2017 at 6:49 PM
    Last edited: Mar 20, 2017 at 7:26 PM
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  5. #25 Posted Mar 23, 2017 at 12:54 PM

    Cruisin' on my Bluebird

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    A timely discussion came up on CR.
    [​IMG]
    It was an example the original derailleur mounted chainguard.
    That led to photos and catalog examples of the suicide-FD-mounted chainguards made by Cyclo and Huret - the Huret catalog page is '58
    [​IMG]
    [​IMG]
     
    #25 bulldog1935, Mar 23, 2017 at 12:54 PM
    Last edited: Mar 24, 2017 at 5:23 AM
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  6. #26 Posted Mar 24, 2017 at 9:48 AM

    Cruisin' on my Bluebird

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    I hunt these down on ebay, and use them everywhere they're needed on all my bikes
    [​IMG]
    (where these spread wide on big tubes, cut a slice of road butyl inner tube - makes a great rubber band to keep them firm)

    The plastic cable clips from the 70s/80s.
    [​IMG]
    They protect the cable ferrules, the bolted or brazed ferrule bosses, the cables themselves, and make any cable operated control more positive by eliminating flop of the cable. Needed where any cable coming from your bars hits the frame triangle.

    This is especially useful on side pull brakes, where a third of your brake lever travel can go into flopping the cable housing around.
    [​IMG]
    [​IMG]
    They may not be elegant, but it's a case of form follows function.

    This RD boss was a very useful place for one - the housing wanted to bend the cable at 30-degrees coming out of the boss.
    The torsion was too great for the clip alone to hold the cable, so I used a zip-tie behind the cable clip.
    But this should eliminate a usual source of ghost shifting problems, and keeps the cable moving straight and smoothly through the boss.
    [​IMG]

    btw, paid for and ordered my custom hubset today. I will say the modifications cost $150 more than the normal hubset price.
    [​IMG]
     
    #26 bulldog1935, Mar 24, 2017 at 9:48 AM
    Last edited: Mar 24, 2017 at 10:21 AM
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