Questions tagged [aluminum]

Questions related to bicycle frames made from aluminum alloy.

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3
votes
2answers
94 views

Failure statistics of carbon fiber vs aluminum mountain bikes?

I've read a lot of carbon fiber vs aluminum debates. The anecdotal evidence for one being better than another is not very interesting to me. I'm interested in the statistics. Does anyone know where I ...
2
votes
1answer
52 views

Safe to use 10-speed wheel in a aluminum frame bike made for a 7-speed

I have a '91 Trek aluminum road bike which was originally equipped with a 7-speed drivetrain. I upgraded the drivetrain on another bike, so I transferred the old 10-speed drivetrain, to the Trek. The ...
1
vote
2answers
139 views

Bottle holder - aluminium or titanium bolts?

I'm a "weight-weenie" and optimize the bolts I'm using. Replacing steel with aluminium or titanium, depending of the location (to summarize: exerted forces, and dangerosity in case of breakage). ...
3
votes
0answers
44 views

Why have my crank arms started corroding?

I have a set of Rotor 3D cranks and I've just noticed that the non-drive-side crank arm is corroding at the end and around the pedal bore, beneath the surface finish. The drive-side arm is fine. I ...
3
votes
2answers
67 views

Deformed Headtube Around Bottom Cup

Crashed into a fallen tree at speed on my bike. I disassembled the front end to inspect for damage and noticed I could wiggle the bottom headset cup back and forth slightly. On further inspection, the ...
1
vote
4answers
194 views

badass-stuck seatpost [duplicate]

I've recently found a nice bike with a steel frame. Well I noticed the aluminium seatpost was stuck but had no idea how heavily. To be honest I never had a similar problem and underestimated that ...
1
vote
5answers
411 views

Carbon vs aluminium commuter for 50km per day [closed]

Is it worth it to purchase a carbon bike for commuting daily 50km. I'm thinking I would be faster and also be able to train on weekends for my first iron man this year. I don't have the funds to ...
2
votes
2answers
837 views

2014 vs 6061 vs 7075 aluminium components

I saw a crankset made of 2014-T6 aluminum alloy (so it was claimed). I read that this alloy is somewhere in between 6061 and 7075 in terms of strength. I also learned that it is also more brittle ...
1
vote
4answers
352 views

Aluminium Aerobars on Carbon Handelbars

Since I want to build up a new bike with road or gravel handelbars and aerobars I try to get as much information about it as possible. Now I have just watched a video where the person in it says (at ...
2
votes
2answers
322 views

Is this damaged aluminium frame unsafe to use?

Hello I have a Giant Seek 3 aluminium frame where somehow the rear rim has rubbed the frame creating a hole as shown in the picture. On the other side there has also been some rubbing/scratching but ...
2
votes
2answers
326 views

Help please - Dent in top tube of double butted aluminium frame

I have a ridgeback velocity which is labled as double butted aluminium. Around the middle of the toptube is a dent shown in the photo. There is also a short line above it which I can feel with my nail....
5
votes
1answer
338 views

Can I repair this valve stem hole?

Today I got a stick wedged between my frame and tubeless valve stem. In addition to snapping the stem I widened the hole a bit. Any suggestions on how to fix it? Current plan is to go over the whole ...
3
votes
0answers
113 views

Mavic Cosmic SLS - carbon separation

Some aero’ wheels are an aluminium rim with a carbon fibre shroud. On a Mavic Cosmic SLS rear wheel, I’ve found that the carbon fibre shroud is separating from the aluminium rim. Just visible in the ...
9
votes
1answer
175 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
2k 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
159 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
281 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
2k 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
4answers
2k 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
495 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
350 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
247 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
4answers
420 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
2k 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
2k 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 ...
3
votes
1answer
198 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
544 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
2k 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
853 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
491 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 ...
2
votes
2answers
16k views

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

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 ...
-2
votes
1answer
558 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
9k 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
998 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
4k 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
200 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
4answers
4k 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
281 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
7k 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 ...
2
votes
1answer
742 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
2k 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 ...
11
votes
2answers
826 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
809 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
147 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
3k 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
483 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
4k 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
598 views

Corroded brake levers

I think this corrosion comes from sweat. How can this be removed?