Bikerumor Monday Mystery Pic

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!

To send in your own Mystery Pic to be considered for the Monday feature, click here and attach your photo with all pertinent information.

Comments

david - 07/09/12 - 7:03am

Shimano AX brake caliper

Adam - 07/09/12 - 7:08am

Dura Ace AX brake caliper.

Atganirider - 07/09/12 - 7:15am

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

Atganirider - 07/09/12 - 7:20am

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?

David - 07/09/12 - 7:29am

Shimano AX brake caliper, despite captcha

Kris Hicks-Green - 07/09/12 - 7:32am

Shimano 6300 Series 600 AX aero brake, circa 1981.

warthog - 07/09/12 - 7:35am

Looks like a Shimano Dura-Ace AX caliper to me.

David - 07/09/12 - 7:36am

Shimano Dura-Ace AX front brake caliper, despite captcha

Patrick Fowler - 07/09/12 - 7:37am

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

Sean - 07/09/12 - 7:39am

Shimano 600 AX Aero brakes? http://positivo-espresso.blogspot.com/2011/05/mobs-big-box-of-small-wonders.html

atganirider - 07/09/12 - 7:50am

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?

Yarden Bar-nov - 07/09/12 - 7:58am

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

hjhanny - 07/09/12 - 8:49am

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

Patrick AKA Wiper - 07/09/12 - 8:52am

adamo !

jerm - 07/09/12 - 10:58am

http://www.classicrendezvous.com/Japan/shimano/Shim_AXgrp.htm

Check out the entire group on Dave Wares Stowe Shimano/Onion River team Tommasini AX bike. It is hanging on the wall at cycles de ORO.

http://www.classicrendezvous.com/Japan/shimano/shimano_ax_team.htm

PRF - 07/09/12 - 11:48am

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.

Chis - 07/09/12 - 5:52pm

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!

Jeff Wills - 07/10/12 - 12:55am

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:
http://www.sheldonbrown.com/shimano1982/pages/15.html
http://www.sheldonbrown.com/shimano1982/pages/16.html

Kristibee - 07/10/12 - 7:22am

Answer from Jeff at First Flight Bicycles: “Shimano Dura Ace AX road brake.”

jimmythefly - 07/12/12 - 1:34pm

@ Atganirider – 07/09/12 – 7:20am
“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?”

The ones with an eccentric were the DX BMX cranks as seen here:

http://martin-bike.com/BikeShop/slides/Shimano%20DX%20cranks%20-%20blue.jpg

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