frame materials part 3: Aluminum is it all its cracked up to be

Aluminum is a fickle material, in its basic form it has about half the tensil strength of 4130 steel and about half the weight. As already mentioned in the steel discussion this means that the strength to weight ratio of aluminum and steel is about the same, so aluminum is not always going to be lighter. But as mentioned in its "basic" form, we can use different materials mixed into the tubing to give different properties, now we can get the frame fairly lighter then steel, at least the basic steel frames. So what does this mean, well to me it means that when looking at a complete bike often in the sub 2000.00 price range aluminum can give us a fairly nice riding bike that is often lighter then the other materials. Things like hydroforming has opened the doors to shaping the materials, and some tuning of the frame for ride quality. Although not to the extent of the other materials when we start spending more money.
Aluminum back in the 80's looked like a steel frame, thinner tubes and they rode like noodles. Then in the 90's we went to beer can tubing, extra big and extra thin. Now we are in the middle, with some shaping thrown into the mix. So when someone tells you that aluminum rides stiff and harsh, remember it is not the material but what you do with it.
In my opinion aluminum is hard to beat for a road bike under 2000.00 and still dominates mtb frames across the board from the big companies. But if your throwing down some serious money steel, carbon and ti often are the materials of choice...
So is it all cracked up. Well the cracking problems that seemed to pop up in the 90's are gone like the 90's. We have refined the material and refined the production process, you still have to get the right frame for the right purpose but assuming you do it will last.
Next time lets talk about the space age material from" planet marketing department" titanium

We are ordering a shop jersey, orders must be in by june 14. reg. price 80.00, pre-order price 65.00 with 40.00 deposit. Come in and try one on, no discounts will be given after order is placed. Real jersey may differ slightly from picture this is our first draft.

Frame Materials Part 2 ( steel )

Is steel real, well I say it is the real deal. Steel has been used to make bicycles longer then any other material. And many say that if steel was NEW then everyone would want a steel bike, the problem is that steel is not new and many people think that it is a traditional and old material, but not at the cutting edge. Well they are wrong and right, steel is an older material and plain old 4130 might not be so cutting edge, but with materials like 859/953/platinum ox and the such the steel of today is not quite the same as the steel of the old. And here is a little thing, the tubing we are using in bikes is not even the most advanced steel out there we just dont have the demand to source the newest stuff, so if customer demand went the industry could afford to get the majical steels that are out there.
Some of the factors we look at when looking at materials are Stiffness, well steel is stiffer then aluminum and Ti. Density, Steel is more dense the aluminum or Ti. When we look at these to factor the stiffness to weight ratio is about the same between the 3 materials. Wait a miniute, the bike shop I went in said that this cheap hybrid was an upgrade because it is aluminum and it would be lighter, well I guess you should have went to a better bike shop.
One of the last things to look at is tensil strength, for the most part the minimum tube used in a good steel frame is aircraft 4130 which has a tensil stgrength of 90,000 ksi, strong enough for most applications, need more then just upgrade the tubeset for the needed strength.
lets not forget that steel rides nice, and last a lifetime. It can rust out, so take care of it and it wont. You can wreck it and it will usually hold up, if it dont you can have it repaired. and by choosing different tubes and having a custom build you can get it to do about anything you want.
Steel is a great option, next time lets look at Aluminum and see if its all its CRACKED up to be.

Frame material series PART 1

What is the importance of frame material, is carbon the only good thing. Why is it that when a customer comes into the shop looking at a more economical bike they ask if it is aluminum or steel, and why do they assume that aluminum is the better choice. If my frame says super high modulas carbon fiber does that mean I will win the Tour de France.
This will be a multi part series discussing different frame materials, there use, the marketing behind them, and what is tecnology and tradition in the bike world. And could you believe that most of the decisions in the bike world are based on the customers wants, desires, and beliefs. Even if the frame manufacture knows better, so next time you complain about the color, material, cost, etc. blame yourself-you are the reason they did it.
We will be looking at steel, aluminum, TI, and carbon fiber. Stay tuned for the next part of the series, Steel the real deal.

Holiday

Well the holiday's are almost here. I have the occasional christmas present sale in the shop, but december is still not a good month, I will just have to wait for the spring. Our spinning class is having a good turnout, so that is fun, I have a little company to talk to a couple nights a week. The weather has been hard to figure out, october was so wet and cold, november was pretty mild, and so far december has been all over the place, heck we had a big thunder storm the other night and it was in the 20's the night before, what is up with that.

SNOW

A little snow never hurt anyone. But if it scares you we are spinning at the shop tuesday and thursdays from 6-7pm. There is also a night ride tonight at bangert island 7-10pm if you are willing to brave the cold.
Things are slow at the shop right now with the first few days of really cold weather in st. louis. So stop by sometime and hang out