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Questions tagged [aluminum]

Questions related to bicycle frames made from aluminum alloy.

9
votes
1answer
114 views

Is this aluminium rim saveable?

I have an 8 inch rear wheel off an adult scooter. It appears to have suffered crush damage - at a guess someone's driven a car over the wheel while on its side. The bend is smooth and covers perhaps ...
3
votes
2answers
250 views

Suitable bicycle grease for aluminium and steel materials?

I hope you enjoy your day. A few days after of using my bike I have some troubling feeling about it. I can hear a cracking sound or something similar, and on the internet I found out the cause. I ...
2
votes
3answers
137 views

Is it cheaper to mass produce a carbon frame than an aluminium frame?

I've heard this comment but I have not found any information about it. Is it true?
3
votes
1answer
113 views

How to evaluate different alloy types used for bicycle frames?

Only certain alloys are used for bicycle frames besides other materials like carbon fibres (at least for the mass market). I often stumble over aluminium alloy 6061 and 7005 (and I think I saw 8004 ...
5
votes
1answer
347 views

How serious is the dent on alu frame?

I have crashed on my cyclocross bike and got a dent on it's alu frame. I don't see cracks. How serious is this dent? Can it lead frame to suddenly fail?
6
votes
3answers
457 views

Crack/fissure in the headtube

My 2007 Ghost AMR 5700 developed a crack or fissure at the upper end of the headtube. I do not know whether it developed over time or whether there was a specific event leading up to it; it looked ...
0
votes
1answer
146 views

How to remove alu seat post from carbon frame?

My aluminium seat post is seized into my carbon frame. To make matters worse the seat post is snapped at the seat post collar - nasty crash. Anyone have a way to get it out? Or is it time for the ...
3
votes
2answers
81 views

Is it safe to polish aluminum rims?

Everyone loves polished aluminum, but you typically have to pay a good 30% more for it vs. any other finish. Since polishing is a simple process requiring widely-available tools, I thought I could ...
0
votes
1answer
127 views

Is Trek Emonda ALR have thinner or thicker diameter tubing than the carbon model?

I'm wondering if Trek Emonda ALR have thinner or thicker diameter tubing than the carbon model SL/SLR? I might actually get the aluminum one if it's thinner.
4
votes
3answers
165 views

Aluminium rigid fork for winter

I'm looking for the bike for winter riding and found this one. It's all good, except for the fork: some people say that aluminum rigid forks can not absorb vibration and therefore are bad for the ...
2
votes
3answers
929 views

Harsh Winters bike - Steel vs aluminum frame?

I am looking to a buy a single speed commuter bike which I can also use through the harsh winters here. I have narrowed it down to two bikes - One has a 6061 Aluminium frame while the other has a hi-...
2
votes
2answers
1k views

Is it ok to sit on the top tube of my Cannondale CAAD12 (2017 model)?

I just picked up my new Cannondale CAAD12 bike the other day. During my first ride I occasionally was sitting on the top tube (waiting for traffic lights etc). After the ride was over I actually ...
4
votes
1answer
177 views

Can this frame be saved?

I had a little accident and went over the handlebars. I'm okay, I was able to ride the bike home, but it is obviously bent. Everything else on the bike seems to be fine, the wheels are true and ...
2
votes
4answers
337 views

Kickstands “designed for steel frame”

While looking for a rear kickstand, I came across one which says "designed for steel frames". Besides carbon frame which I am pretty sure cannot be "squeezed", is there a real difference among steel ...
7
votes
2answers
1k views

Aluminum frame quality - how much variation can there be and how to tell?

Take a look at these two aluminum frames. The first one is a $1k bike, and the second one is a $200 bike. Is there a significant quality difference between these frames? And if so, how can I appraise ...
4
votes
4answers
669 views

How do different frame materials affect the handling of a bike?

I can appreciate that some materials are lighter than others and some have more flex than others, but overall, how do different frame materials affect handling of the bike? Assuming the same geometry ...
1
vote
1answer
267 views

Restoring Aluminum Cranks

Is it all right to strip and then anodize (at a shop, I suppose?) aluminum cranks? I'm trying to build a bike and I saw second-hand cranks on eBay. They look like they're fine except for the ...
1
vote
1answer
8k views

Aluminum forks vs. carbon forks (with aluminum frames) what are the trade offs?

The all-aluminum frame bike will be cheaper. The aluminum fork should be more robust and less prone to breakage. The carbon fork will be more shock absorbing and comfortable. That's kind of how I ...
-3
votes
1answer
465 views

Aluminum alloy or carbon fibre handlebar? [closed]

Should I buy a carbon fibre handebar or an aluminium alloy one for a mountain bike? I would prefer the stiffest, as I do tricks but I don't really know which one is the stiffest. I seen both aluminum ...
2
votes
1answer
5k views

What is the life expectancy of aluminum alloy frames? [duplicate]

I learned for the first time that aluminum alloy frames are said to have a "life expectancy". This is the bike in question, my 2007 Felt Z80. It has an aluminum alloy frame. I really like it and don'...
3
votes
2answers
440 views

aluminium fatigue how to know if some thing is going wrong?

I have an early 00' road bike with aluminium frame. I have read some stuff about aluminium having life expectancy of ten years. What it exactly means? I cant see any thing wrong in the frame (there ...
8
votes
1answer
3k views

carbon vs aluminium frame vibration absorption? bumpiness?

is there any data/measurements of any aluminium road bikes vs carbon road bikes wrt to vibration. it is widely stated that carbon is a smoother ride, but the best i can find out on the subject is ...
1
vote
2answers
132 views

How can I treat an aluminium frame ready for restoration?

I have an old aluminium framed mountain bike which has developed some 'oxidation / corrosion' underneath the lacquer -- it kind of looks like little white worms! The frame as original has a nice ...
6
votes
3answers
3k 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 ...
3
votes
2answers
116 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 ...
5
votes
3answers
4k 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 ...
3
votes
1answer
595 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 ...
12
votes
4answers
2k 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 have ...
5
votes
6answers
1k 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 ...
12
votes
2answers
567 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.
0
votes
2answers
577 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?
1
vote
1answer
1k views

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

I was just curious, how much is a frame in a entry level road bicycle worth? In total, what is the cost of a frame per unit in a bicycle built using i.e. a Shimano Sora groupset, white-labelled ...
1
vote
1answer
138 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 ...
1
vote
4answers
2k 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 ...
2
votes
1answer
374 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 ...
5
votes
1answer
3k 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 ...
2
votes
2answers
354 views

Corroded brake levers

I think this corrosion comes from sweat. How can this be removed?
5
votes
2answers
11k 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 How ...
1
vote
2answers
658 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 I'...
0
votes
2answers
8k 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 ...
2
votes
2answers
941 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 ...
3
votes
4answers
8k 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 ...
5
votes
2answers
17k 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 up/...
5
votes
1answer
1k 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 ...
16
votes
4answers
2k 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 ...
4
votes
2answers
915 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 ...
-1
votes
3answers
574 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 ...
6
votes
9answers
13k 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 ...
1
vote
2answers
652 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
5answers
8k 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 (...