Bicycle frame construction, selection, maintenance, and repair.

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13
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 ...
26
votes
6answers
20k views

Why is carbon fiber inherently weak? Or is it?

This question got me to thinking: If it were possible for me to use a carbon frame, I would, but the expense and my riding style keep me using steel and aluminum. (I like hauling stuff on racks and ...
8
votes
1answer
477 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 ...
4
votes
1answer
457 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
749 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 ...
20
votes
4answers
9k views

How can you recognise a quality steel frame?

I'm looking to buy/build a road bike and I would like it to: last 100 years have a low environmental cost As I'm not interested in shedding grams (a diet would be more helpful for me), I'm leaning ...
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 ...
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, ...
8
votes
3answers
515 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
9answers
4k views

Removing Seat Post rusted into downtube

I have an old steel frame (Columbus Number 2 I think) that has the seat post (Suntour Superbe Pro - see, I said it was old!) rusted in. I have tried lots of WD-40 but it will not budge. Any tips on ...
13
votes
2answers
758 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?
11
votes
3answers
2k views

What are the advantages of investment casting?

I'm starting to see more and more frames using investment casting for head tubes, drop outs, seat tubes, etc. Such as the new WTP c.r.e.a.m. frame . It looks nice, but I'm suspect on how much more ...
13
votes
5answers
4k views

Rear wheel slipping out under load

My commuting/cyclocross bike (a Surly Crosscheck) has a problem. If I tighten the quick release skewer to a normal level, sort of firm to close it, then if I step on the pedals hard at some point, ...
5
votes
1answer
900 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 ...
13
votes
3answers
6k views

How do I measure the size of my bicycle frame?

From what point to where do I start measuring? I suspect the bike I'm trying to measure is a 56cm because I usually ride a 54 and this is slightly too big, but I want to be sure.