Bicycle frame construction, selection, maintenance, and repair.

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13
votes
5answers
971 views

Why is it common for cheap bikes to have the frame sawn in half below the saddle?

These days cheap bikes often seem to come with the frame sawn in half below the saddle. What does the manufacturer gain from this design, and why is it associated mostly with cheap, low quality ...
2
votes
3answers
6k views

What belt-drive compatible frame and belt-drive kit would you recommend?

I would like to build a custom belt-drive bike for my daily commute. I am looking for a frame and a belt-drive kit for a total budget of about 500$. I ride all year long, and winters here (Montreal, ...
4
votes
1answer
396 views

What tools are required to begin building a frame?

What tools are required to begin building a frame? Are there DIY substitutes for any of them? Are there things that aren't requirements, but simplify the process enough to be worth the cost? Aside ...
1
vote
2answers
2k views

Does anyone have experience with Bottom Bracket Tap/Facing sets?

I'm interested in recommending my boss get the workshop in which I work a bottom bracket tap and facing set. As it's quite an investment it's important to me to know what you're getting for your ...
2
votes
2answers
99 views

Putting brakes from a fat frame onto a skinny frame

I took a bunch of parts off of a bike with a hybrid titanium/carbon frame (it died), and am using them to build up a bike from a sweet steel frame I got on ebay for a song. It's my first time building ...
4
votes
2answers
1k views

Is torque relevant for steel/aluminium? Where do I find torque specs?

When you are not dealing with carbon, is torque relevant? I've never seen it mentioned on the hundreds of answers here, or the hundreds of how-tos I've read elsewhere. Should I just tighten ...
1
vote
3answers
2k 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 ...
5
votes
3answers
4k views

Metal seat post with carbon fiber frame?

Is using a metal seat post on a carbon fiber frame advisable or not? I want to use a seat post mounted rack on my road bike (no regular rack mount points are on this bike), but I have been told that ...
5
votes
4answers
1k views

Why aren't sportive' 'bikes popular outside the UK?

I recently bought a 'sportive' bike, i.e. very much like a road bike but with a taller head tube to give a slightly more upright, more relaxed, less 'heads-down' riding position, and a triple chainset ...
5
votes
1answer
912 views

Experience with welding Titanium frame?

My Litespeed Tachyon, a 1996 model, of which I am the second owner, (So Litespeed will not honour the warranty) has now developed its 3rd crack. First was in the seat tube above the deraullier and I ...
3
votes
1answer
1k views

How do I fix a dent on my frame?

I suspect that something has pierced my frame. At any rate, I have a dent in my bike frame. I would like to avoid the possibility of corrosion, with minimium cosmetic trade off. So, how do I go about ...
2
votes
2answers
648 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 ...
8
votes
1answer
482 views

What's the definition of a Mixte?

What makes a mixte frame? Further, what's the etymology of 'mixte'?
13
votes
3answers
6k views

Repairing a bent bike frame, is it worth it?

I have a bike with an incredibly bent frame. The bike itself I have tried to replace with other inexpensive bixes, but this one just had a certain geometry that I keep wanting to resurrect it. It is ...
3
votes
1answer
214 views

How to find a frame given a geometry

In 2007, I bought my first bike: a Bianchi Boardwalk 2006. It was a great bike, but I didn't treat it well and it now needs about $300 worth of work. I've been thinking that maybe I'd like to take ...
14
votes
6answers
2k views

I keep breaking my road frames - why?

I've gone through four frames in the last decade or so, all from different manufacturers, all steel but both lugged and welded. Every one of them has eventually developed a crack, been repaired and ...
4
votes
1answer
464 views

Cyclocross bike frame considerations

I'm considering putting together a cyclocross type bike together for fun and variety. Is a typical road frame suitable for this? And, what do I need to consider in terms of sizing? On sizing, it ...
7
votes
2answers
770 views

Switching Parts to a New Frame

What things do I have to consider when planning to switch parts from one frame (old one) to another frame (new one)? Will all the parts transfer? What items may need replacement because they won't ...
7
votes
2answers
1k views

What should I consider when choosing a bike frame?

In thinking about building a road bike from scratch, what should I consider when choosing a frame? I'll be building from all new components and plan on just doing day rides of a few hours a piece, ...
17
votes
1answer
9k views

Road bike carbon fiber frame life span

I have read in several places that the carbon fiber has a shorter life span than the aluminium, and i was wondering just what would it be. I am not referring to accident related failures of the ...
8
votes
3answers
538 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 ...
14
votes
2answers
2k views

Dealing with rust on a steel frame

I have a small spot of rust on the bottom side of my steel frame's top tube (Columbus Niobium tubing). It's from abrasion during transport that I didn't notice until it was too late. The spot is ...
13
votes
2answers
776 views

How to prepare a frame for a new paintjob

I want to have my bike frame repainted. What should I do before I give it to the paint shop? How would they like to have it prepared?