Questions related to bicycle frames made from aluminum alloy.

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12
votes
4answers
830 views

Why use multiple materials on chainrings?

Why is it that on a typical mid-level road triple crankset, the outer rings (larger rings) will be aluminum, while the inner ring (small ring) is chro-mo? It seems to me that if aluminium was good ...
12
votes
2answers
303 views

Last grand tour won on aluminum?

What was the last grand tour won on an aluminum frame? Also, any details about the bike itself and the rider would be appreciated.
11
votes
4answers
4k views

Why would a bike feature a “carbon wrapped aluminum frame”?

I saw a link to what appeared to be a Carbon bike on amazon. The price was extremely lower than any carbon bike I had ever seen. After reading a bit, it seems that the bike frame is really made of ...
10
votes
3answers
782 views

non-steel frames and longevity

Until recently, I had a late 80's Schwinn aluminum frame bike (now a thief has a 80's Schwinn aluminum frame bike, but that's another story). I had heard a number of horror stories about early ...
9
votes
3answers
769 views

Are curved aluminum forks safe?

This is an entry-level road bike made by "Upland", a Chinese company. That fork is aluminum. You usually only see steel (and sometimes carbon) forks curved like that. The only reason you would ...
7
votes
10answers
5k views

Steel vs. Aluminum Wheels

I was at my local bike dump looking for a spare set of wheels for an older bike I have. He said that they have lots of steel wheels but very few aluminum. Whats the deal on this? What are the ...
6
votes
1answer
216 views

Stress on front fork from car transport

It's often easier to transport a bike in the back seat of a car with the front wheel off, rather than setting up the bike rack. I've noticed that, due to the way the car seats are built, there's often ...
5
votes
5answers
1k views

Is there anything special to pay attention to when preparing a bicycle for powdercoating?

I am thinking of having an old bike powdercoated to spruce it up a bit. What do I need to do to prepare the frame? Remove all components? What about stickers and decals? Some kind of chemical etching ...
5
votes
3answers
117 views

Slipping aluminium seatpost in aluminium frame

I've already seen this question: Problems with a slipping seatpost The main difference is that I have an aluminium frameset and a forged alloy seatpost - lightweight clamp. After every couple ...
5
votes
6answers
5k views

Aluminum seatpost stuck to a steel frame

I'm trying to free my aluminum seatpost corroded to a CrMo frame. One of the methods is to heat the aluminum seatpost and then to let it cool. In theory, the aluminum will expand twice as fast as ...
5
votes
1answer
583 views

Repairing Carbon / Aluminum frame

My road bike is aluminum with a carbon rear triangle. The carbon rear slides into the aluminum, and I believe was bonded with some sort of epoxy. The pieces have begun to separate after 2.5 years ...
4
votes
2answers
374 views

Seatpost maintenance : removing rust

I have an aluminum seat post in a steel frame. The post was really hard to extract and I don't want this thing corroding on me. You've discussed how to take care of the rust on a steel frame and on ...
4
votes
1answer
597 views

Steel vs Aluminum Spokes and Rims

I'm looking at a couple of cruiser bikes on Craigslist. I want to take them to my beach house for guests. How can I tell if the rims and spokes are steel or aluminum? The steel spokes on an ...
3
votes
5answers
245 views

How long will this alum frame last?

I picked up this very cool 96-97 GT rage from Craigslist with the intention of restoration- a few rusty pinch bolts, spider eggs in the brake hoods, grinding bearings and pitted races, and all the ...
3
votes
3answers
3k views

Tight Seatpost Installation

I'm having a bit of a problem installing my seatpost. I have a 31.6mm carbon-wrapped aluminum seatpost which fit perfectly fine in my previous aluminum frame. Unfortunately, that frame cracked, ...
3
votes
1answer
143 views

Specialized Allez - Upgrade to Carbon Seatpost for Long Distance Comfort?

A bit of background: I've been riding a stock 2012 Specialized Allez since I bought it (in 2012). I am a larger guy (105 kg), and tend to go for rides in the 50-100+ km range. No matter what I wear ...
3
votes
2answers
4k views

Trek Aluminium Grade Comparison

Looking through the Trek archives, I see they have frame materials described as: Alpha Black Aluminum Alpha White Aluminum Alpha Gold Aluminum Gold Series Aluminum 100 Series Alpha Aluminum etc ...
3
votes
2answers
40 views

Can I replace a 26“/2,0 rim with a 26”/1.75 rim?

My bike's front rim bent and I want to replace it. I bought a Apollo Summit 10 for 250$ After some time the front rim bent when I fell down on the street and when I asked in the market its 120$ for ...
3
votes
4answers
4k views

restoring the finish of an oxidized polished aluminum frame?

In the context of restoring the finish of an oxidized once-polished aluminum finish, is there anything better (easier) than 0000 steel wool with Marvel Mystery Oil? I am restoring an old Cannondale ...
3
votes
0answers
42 views

What's the strongest way to bond a cable stop to an aluminum frame?

I recently picked up another well loved GT road bike frame- it's in great shape aside from a missing downtube cable stop. The model is a ZR 4000 probably from 1999, it's 7005 heat treated aluminum. My ...
2
votes
2answers
409 views

Should I force an 130 mm hub into my old vintage alu frame

I have a classic vitus 979 aluminium road frame where the rear dropout width is 126 mm. Most of the things I hear is that you should not use force on an alu frame and try to fit in an 130 mm hub in ...
2
votes
2answers
1k views

Maintenance on an Aluminium frame

I have an aluminium frame. The top tube has become slightly scratched or pitted (by something hard, presumably, I don't know what; maybe while it was parked). Does it need maintenance (e.g. does the ...
2
votes
2answers
6k views

Knowing what bicycle frame material I have

I have a bicycle frame that's really heavy. It's a mountain bike frame with shocks, so I decided to replace the entire frame with a city bike aluminum frame(I only use the bike if I have to pick ...
2
votes
2answers
138 views

Corroded brake levers

I think this corrosion comes from sweat. How can this be removed?
2
votes
1answer
153 views

Carbon-wrapped Aluminum seatpost?

I have the seatpost shown in the pictures below. It came on a 2010 Specialized Tricross. It looks like Carbon fibre on the outside, but when you look at the open end of the tubing, it actually looks ...
1
vote
4answers
4k views

Correct inflation pressure for old road bike

I have an old Fuji road bike that I got a garage sale a while back. It's probably from the 70s or 80s. This summer, I've been trying to fix it up into good condition for some longer-than-usual rides ...
1
vote
2answers
574 views

Does “Carbon & Aluminium” really mean cheap plastic coated aluminium?

I'm looking to replace the suspension fork on my MTB (which has blown a seal) with a rigid fork now that I'm exclusively commuting in the city. During my research I came across the MOSSO 26" MTB ...
1
vote
2answers
2k views

Where can I get a new steer tube or 1 1/8" 6061 Aluminum Rod Stock?

I have an Anti-Gravity fork that features a removable steer tube, but it is a threaded fork. Where can I buy a threadless steer tube to clamp into it to convert it? All I can find are threaded steer ...
1
vote
3answers
3k views

Is this aluminum “rust” in my frame?

I found an aluminum bike in the trash and it seems like it has been exposed to the rain, especially because some of the metal is slightly rusty. The frame is a different thing, because altough it is ...
1
vote
2answers
289 views

painting an aluminum/carbon frame

I have a frame I would like to get repainted. It is a composite of aluminum and carbon fiber (Al main triangle, carbon fiber seat/chain stays). The carbon fiber is unpainted (maybe a clear coat) and ...
1
vote
1answer
213 views

How much is a mass production aluminium frame worth? [closed]

There are several entry level bikes under $600. I actually own one, an excellent Felt F95. I was just curious, how much is a frame of such a bicycle worth? In total, what is the cost of a frame in a ...
0
votes
1answer
62 views

Spraying frame of GT Transeo

I've got a GT Transeo 1.0 bike (bought in 2011 or 2010 as best as I can remember) and I'd like to try painting the frame to get rid of some (very minor) surface rust and paint damage. I've read a ...
0
votes
2answers
7k views

Carbon Fiber vs. Aluminum [duplicate]

I am a new cyclist who is on my 2nd year of biking. I bought a cheapo Schwinn MTB at Walmart to start with but now I want a real road bike. I currently have $2k saved up and am looking into a ...
0
votes
2answers
136 views

What are the advantages of having a aluminium frame? [duplicate]

are there any advantages that an aluminium body brings to the tables over carbon frames?
0
votes
4answers
230 views

MInor (I think) dent in top of Orbea Alma top tube - frame ok or no?

UPDATE: My lbs mech / owner (same guy) looked at it this AM, says it is good to go, 'ride the hell out of it', he 100% backs it up. And FWIW re: the specifics of this frame and why it's purely ...
-1
votes
3answers
351 views

Is my old bike safe?

The old bike is a Cannondale R-600 purchased in 1999. Original key components. Frame, fork. (Aluminum frame, carbon fork) Ridden for several thousand miles. Well maintained. (Various parts have ...