Frame identification by frame number

A positive number means your head angle will increase; you’re installing a shorter fork. The diagonal row of zeros shows, of course, that if you replace an old fork with a new fork of the same length, there will be no change in head angle. If all else remains the same, a steeper head angle is quicker handling, while a shallower head angle is slower handling. Red Values in the Table I’ve changed the color of a few values in the table to red. These are the changes in head angle that are greater than half a degree in magnitude. I’ve made them red because, in my experience, any change over half a degree will probably be noticed.

Sigma 1BC 14.16 – 14 Function Computer

Are there other things to look for to try and determine the date? Centerpull brakes and 5-speed freewheels went out of fashion around I have another interesting one. It says made in Japan on the Seat stay by the Bottom bracket but no mention of type of tubing. Nicely lugged, Has Dia-Compe center pull brakes which according to Sheldon Brown puts it before I think it’s a local distributor’s brand, perhaps DC area.

VERY IMPORTANT: THIS WILL NOT FIT A REGULAR BMX FRAME – a standard 1″ threaded fork BMX frame takes mm bearing cups – this headset has mm cups and is designed for road bikes – but it may fit old school MINI BMX frames (these are for smaller riders and .

April 12, The Unicrown Fork Those who have been reading this blog for some time, are no doubt familiar with my rants against unicrown forks. When the topic comes up, some agree, others question my fixation on this detail, and others still want to know what a unicrown fork is. Now that I am temporarily living with a unicrown forked bike , the time seems right to elaborate.

A vey basic primer in bicycle fork construction: There are many fork crown designs in existence, but the general concept is the same. Now, a unicrown fork is constructed differently in that there is no crown. The two fork blades are bent towards each other at the top, then typically welded together at the steerer tube.

A unicrown fork is simpler and less expensive to make than a lugged crown fork, which is why it has become so ubiquitous among contemporary bicycle manufacturers. For some time now I’ve been trying to figure out the history of the unicrown fork, and I keep reading about the first mountain bikes, BMX bikes, and the quest for rigidity – suggesting that its origins were in the s. I have also seen what I can only describe as antique crownless flat-top forks – which appear to be similarly constructed, but are squared-off, rather than round.

Would someone care to educate me on their history? The thing about unicrown forks, is that I don’t actually dislike them per se, at least not in of themselves. What I dislike is when they are incongruent to the overall design of the bicycle.

One more step

Thats funny Chuck and I went to Hooters one time and we had a blast. May 29, I was fortunate to purchase a rare cooks 26″ cruiser made of stainless steel.

MTB suspension forks that use elastomers for the spring (and “damping”!!!) are ancient and generally crap. Being ancient the elastomers will generally be hard, cracked and no longer springy. There are a few places that sell elastomer kits but for rarer forks or non-common applications, it is .

This began to turn around in the camera and electronics industries in the s, but Japanese companies didn’t figure out how to make and sell bicycles for the U. As the s opened, the U. While Japanese bicycles were manufactured to very tight tolerances, and nicely finished considerably better than their European competition , the Japanese had not yet come to terms with the average American’s being taller and heavier than the average Japanese.

This gap was wider at the time than it is now, due to the privations the Japanese population suffered during and after the war. Royce Union he most widely distributed Japanese bike of this era was sold under the name Royce Union. This was a speed, pretty much all steel except for the handlebar stem and the Dia Compe brakes. This bike was only available in one size, 20″, which was considerably too small for an average American man.

It was equipped with Araya steel rims, which were beautifully made, much smoother and truer than European steel rims of the era This was partly due to design, and partly due to the fact that Japanese steel was not as good as European nor American steel. Even though these bikes were not durable, they did have their good points, most particularly the Shimano Lark rear derailer. Although the Lark was quite heavy, it shifted markedly better than the French Huret Allvits and Simplex Prestiges that were coming through on the bikes from Europe.

The Sugino Maxy cotterless crank was a game changer. The inner chainring was attached using the mm bolt circle, which survives to this day in very wide use.

Classic Redline BMX project

Posted by John Ellsworth at 5: I retired the Kestrel, got rid of the Columbia cruiser and my Trek MTB, and most recently sent the Shogun in triple form off to live with my folks with the hope that Dad would make some use of it in the coming years. But moving from a house with a barn to an apartment with no onsite storage has given me the need and the opportunity to think more about simplifying my bicycle situation.

Throw in the SE Racing Bear Trap pedals, Big Honkin’ cruiser bars, Cowboy Cut forks, and new Lightning Bolt padset, and it’s obvious that the SE Big Ripper 29″ is a BMX cruiser bike that rules the streets.

I get to the red lights and wait at the line. Then some older solidly built bloke with a big bushy grey beard of about 50 pulls in in front of me on a hefty looking touring bike, panniers, big tyres, disc brakes, more mountain than road in style. Due to the size of his bike, I thought he would be a challenge to get past when the lights went green. So, green light, off goes greybeard and off I go. He was pretty sprightly, to my surprise, up that hill onto the bridge. Being fixed and with toeclips I take off a bit slower, so I had to catch him up — I got past him near the crest of the bridge and thought nothing more of it.

Ten minutes later at Kings Road, near Edith Avenue, after a pretty speedy run, there is greybeard, having caught me again at the red lights. He did pretty well. Red light, about to change, so like a lot of twats he goes a few seconds ahead of the green. Green light, the rest of us take off, including quite a few speedy looking riders on decent road bikes.

Do you hook up the dead battery first

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The tubeset is Tange Champion, and the only real lapse in the frameset is the matching set of stamped steel rear dropouts, complete with derailleur claw and bolt-on rear wheel. But my sister is a causal cyclist, and this thing is only a few upgrades away from being a perfectly nice bike for her to use with her kids around the neighborhood.

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Elina Ultra Light Snake Seat and Post White

Larger Image The name says it all – the top of the Schwinn line. Schwinn today is part of Pacific Cycle. While Schwinn often had a reputation for building heavy bikes for kids, the Paramount line had a reputation for finely crafted, relatively light road bikes. That is obviously a great price. The very nice woman selling it was good natured about the low price. The bike had belonged to her uncle who no longer used it.

OLD SCHOOL MONGOOSE bmx tange forks – $ Mongoose motomag 2 tange forks Excellent condition for age no dints, cracks or rust Has scratches thread is perfect nut go s to bottom by hand No offers BIDDERS with 0 feedback immediate payment required Contact and payment within 5 days or item will be relisted and reported Post worldwide or cash on pickup bacchus marsh victoria Please.

But after recently concluding forty years of ownership, please indulge me the privilege of sharing its story. Maybe we can think of this as the Impala Sport Coupe of bikes, if that helps. The story begins with a much cooler bike and my first totalled vehicle. I had been a dedicated Stingray rider since my 7th birthday, but the old gold Stingray was showing its age and I was ready for something new.

My friends were getting upsized five speeds. Kevin next door had been on a Schwinn Typhoon for awhile, but Tim down the street got a new Collegiate which sort of set the curve for the rest of us.

How to Remove Forks & Stem /Headset Bicycle Bmx Haro