Questions tagged [aluminum]
Questions related to bicycle frames made from aluminum alloy.
97
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Is it safe to ride an aluminium bike with a big top tube dent?
Someone tried to steal this bike - they damaged the top tube. The frame is designed with a wide flat top tube. Is this still safe to use?
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4
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1
answer
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Rear tire rubbing on both chainstays
I left my bike in our boiler room over the winter, and now the back tire is rubbing heavily on both chain stays. Before it was a very tight clearance, but it worked without a problem. Now, it ...
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0
votes
1
answer
104
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Dents in aluminum
I am looking at a good alloy road bike, cannondale caad12.
It is a good deal but there are some dents all the down the seatstays, not major but not nothing.
Is it safe?
Does it affect the bike?
Should ...
- 581
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5
answers
343
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Aluminum or steel for my first mountain bike?
For the past few months I've been planning to buy my first mountain bike. I'm struggling with buying an aluminum bike or a steel one. I recently read that aluminum bikes are as heavy as steel bikes: ...
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3
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Very tiny dent on new aluminium frame -- anything to be worried about?
I bought a new aluminium folding bike frame last week, and this weekend while I was cleaning the bike, I noticed this very tiny dent on the top tube of my frame. It was barely noticeable and I didn't ...
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1
answer
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What does the frame material name of "SC7 Scandium" mean?
I just realised that my frame material is SC7 scandium. What does that term mean? Is it aluminium alloyed with other elements?
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4
votes
3
answers
308
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Fork done for? Has slight cut on the steerer that
Got this cyclocross frame with a fork, didn't see the cut in the steerer tube until much later. Has a 1mm? deep cut on half of the steerer tube. Is this fork done for? Or am I just paranoid. Aluminum ...
4
votes
4
answers
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Reconciling the two aspects: carbon is stiffer for power, but offers a softer ride
At times composite (carbon) is touted as being stiffer than (aluminum) alloys as well as stiffer than steel (leaving Titanium to a different discussion).
This means that the frame will not yield (much)...
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4
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4
answers
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Drilling hole in aluminium frame
I want to attach a pump holder to my aluminium frame. Can I drill holes in it ? I would then use blind rivets with some glue for waterproofing to attach the holder.
Is there a place on the frame where ...
- 272
3
votes
4
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Can I cut the steerer tube with a pipe cutter?
I found out that Hozan lists a pipe cutter among its tools, and as far as I know all Hozan tools are made for bike mechanics.
From one of the pictures it looks like this could be used to cut an ...
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Looking for a good mountain bike for my daugher. Want disc brakes and Fork lockout [closed]
My daughter is a teenager and we love going biking, either on trails or during camping trips. We are not hard core bikers, but she is ready for a bike upgrade as she is using a 20" wheel bike ...
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Gravel bike frame material: carbon, aluminum, titaniul or steel? [closed]
For a long ride on a gravel bike, what is the best frame material?
4
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1
answer
288
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How can I tell whether any crank is cold forged, hot forged or cast aluminium?
I know that cold forging allows for sleeker designs because cold forged aluminium is stronger. Are there any other giveaways that indicate a certain manufacturing process?
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2
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Aerobar, why would carbon cost more than aluminum?
I think carbon parts are generally more expensive to their aluminum counterparts.
I'm perplexed because aluminum version is cheaper and weighs less too?
What am I missing?
Example:
Profile design ...
- 599
0
votes
0
answers
134
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Carbon fork crack?
I have aluminum bike with carbon fork, this is in the front of the carbon fork, it is in both sides of it?
It's a carbon crack or paint crack?
0
votes
2
answers
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Need help with gears and wheel alignment
i have an aluminium frame single speed. I wanted to know is it possible to add gears to it (correctly). I saw same model with gears installed but the rear wheel was not in line with front wheel and ...
2
votes
1
answer
159
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Aluminium "white rust" on roadbike. How bad is my situation?
After some research I did not find similar photos/examples to mine so decided to ask.
Recently I have bought used aluminum road bike. I did check all other parts and they are in good condition, but ...
1
vote
1
answer
151
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Aluminum fork: paint defect or sign of strained?
I know there's a lot of question regarding paint defect or crack.
But I need your opinion about this.
Recently, I bought new bike but discounted and it's the last piece of it.
On the back of the ...
- 45
12
votes
7
answers
3k
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What are the most basic parts of a bicycle which cannot be upgraded over a period of time?
After reading this question: Cheap MTB with future upgrades v/s costly fully ready MTB, I myself had a question.
What are the most fundamental parts of a bicycle? What are the things which we have to ...
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1
vote
0
answers
45
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bike-frame-jig: customizations of a standard model - interesting features added [duplicate]
good day
i am in the mid of creating a bike-frame-jig.
the model is oriented at tanner w s jig: https://www.instructables.com/id/Bicycle-Frame-Building-Jig/
see some the parts (here as Acronyms ) he ...
- 143
1
vote
0
answers
79
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Trying to estimate cost of replacement for a stolen bike [closed]
The frame says "Nova" and "Columbus". I don't know the serial number. I believe the frame is aluminum. Purchased 2nd (or third) hand in California about 6 years ago.
Above is a ...
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2
answers
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Can and should one install rivnuts into an aluminium frame?
I have an aluminium frame, and would like to add another bottle cage. But there are no mounts below the downtube. I've installed rivnuts into a steel frame before, which worked well.
Can I install ...
- 101k
1
vote
1
answer
406
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Aluminum (6061) frame dropout squeeze
I have a bicycle with a 6061 aluminum frame. I had to replace the rear wheel, and I bought a wheel with an axle length that is a few mm short for the dropout spacing.
In order to fit the axle into the ...
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18
votes
6
answers
7k
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How is this damaged aluminium frame likely to fail?
I had an unplanned collision with a car yesterday (everyone is fine, thankfully) but my bike – a Giant Revolt 1 – now has a lovely new pair of dents.
I cycled it home from the collision (~6km) and it ...
- 290
3
votes
2
answers
836
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 ...
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2
votes
1
answer
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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 ...
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1
vote
2
answers
558
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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). ...
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6
votes
1
answer
302
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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 ...
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3
votes
2
answers
102
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 ...
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1
vote
4
answers
813
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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 ...
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1
vote
5
answers
1k
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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 ...
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2
votes
2
answers
6k
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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 ...
- 303
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vote
4
answers
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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 ...
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votes
2
answers
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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 ...
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2
votes
2
answers
969
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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....
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5
votes
1
answer
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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 ...
- 198
3
votes
0
answers
337
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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 ...
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9
votes
1
answer
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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 ...
- 101k
3
votes
2
answers
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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 ...
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3
answers
242
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?
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1
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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 ...
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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?
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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 ...
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1
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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 ...
- 429
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2
answers
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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 ...
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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
4
answers
587
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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 ...
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3
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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-...
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2
answers
4k
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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 ...
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votes
1
answer
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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 ...
- 246