bikerumor monday mystery pic first flight bicycles

Photo from the collection of Jeff Archer of First Flight Bicycles. If you think you know what this is, post your answer in the ‘comments’ section– the correct answer will be posted there on Tuesday!

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  1. Shimano Ax brakes from the early 80’s

    First aero componentry – very ahead of its time

    Much prized by UK time triallists

    Brake blocks unique to this model and VERY hard (read impossible) to obtain

  2. btw – any pictures of the unique chainset / pedal combination?

    From memory, they had a much larger than usual spindle-diameter for the pedals

    Now I may well be making this up, but were they on an eccentric, enabling one crank to cover 170 – 175mm effective length?

  3. Shimano Dura-Ace AX brakes. I have two pair still! Not much good for stopping a bicycle, but tiny & “Aero”

  4. Shimano 600 AX brake caliper from the early 80’s

    First set of aero componentry, much prized by UK time triallists

    Unique brake block, almost impossible (no, actually impossible) to find

    Chainest also featured an oversized hoel for the dedicated pedal

    I may be making this up – was there an eccentric to allow one crank length serve an equivalent 170 – 175mm effective length?

  5. Hello I’m Yarden Bar-nov from Israel and the part Is…. Campagnolo C Record Delta brake without the front cover.

  6. Definitly Shimano AX, came both as Dura Ace and 600er. DA much rarer, brake pads are impossible to find but todays Swisstop can be shortend to match. Found a complete groupset and equipped an old Gios Torino Aerodynamico with it to rebuild of a late 70’s early 80’s aero bike :-). I have another complete groupset if someone is interested

  7. If I remember correctly the crank pedal combo featured a large whole in the crank and a pedal with a dropped platform. It put the sole of the shoe below the center of the pedal axle. I believe they were popular with Alexi Grewal even after their day had passed.

  8. The crank was called DynaDrive and yes, the idea was to put the ball of the foot inline with the pedal axle by moving the pedal bearings inside the crank. This of course required a MUCH larger pedal spindle and the cranks had a much larger hole in them as a result. The AX group was a sign that the sake was flowing freely around Shimano HQ. I used to have a Lotus frame built around this group. They recessed the spoke heads, the headset had a clear plastic cover to make it more aero, they had an airfoil shaped water bottle, an airfoil shaped seatpost (requiring airfoil shaped tubing), etc. The whole thing was pretty crazy but also kind of neat to look at. BTW Lance Armstrong used one of these brakes on his Trek/Litespeed TT bike back in the Tour. The brakes were a paint to adjust, didn’t stop well, were relatively heavy, and had no less frontal area and drag than a regular sidepull. Modolo had a similar brake around this time – the Kronos – that was much lighter and much smaller. It was also a pain to install and almost completely useless for slowing down, especially if you were running a disc wheel!

  9. Yep- Shimano Dura-Ace AX brake caliper. I remember hearing Wayne Stetina calling them “death brakes”- not really effective due to the small brake pad area.

    There were a couple of the AX pieces left over when I worked at Euro-Asia Imports in the late ’80’s. Pedals, toe clips, stuff like that. I have a rear cassette hub in my collection now.

    Atganrider- yes, there was a Shimano BMX crankset from that era that had an eccentric in the oversize hole. This allowed adjustable crank length.

    Sheldon Brown’s site has scans of the 1982 catalog on his site:

What do you think?