Bicycle frame construction, selection, maintenance, and repair.

learn more… | top users | synonyms (2)

15
votes
3answers
9k views

Explaining the effects of frame geometries

I asked about buying a bike here, and someone asked on my behalf about test-riding a bike before buying. My question is, what should I know, or should have known, about the sizing or 'geometry' of a ...
1
vote
3answers
2k views

Can a (relative) beginner adjust spacing on a 501 cromo road frame?

Have acquired a cheap old Peugeot road bike from ebay; nice cromo frame, but it needs a new rear wheel and unfortunately I didn't check the dropout size before buying. It has an OLD of ~120mm, but I ...
17
votes
3answers
20k views

DIY Painting a Bike Frame: Is it possible?

I have painted a couple bike frames (think really cheap garage-find rebuilds) with varying degrees of failure. Can you help me correct/fill in the missing pieces of my frame painting process? ...
4
votes
4answers
682 views

Type of cycle for losing weight and staying fit for a beginner [closed]

Over a year ago I was diagnosed with a collapsed arch in my left foot and despite trying many times I have not been able to get back on the treadmill. I have been thinking of getting a bicycle to ...
13
votes
2answers
731 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?
4
votes
2answers
1k views

Why don't frame manufacturers ream/face their frames?

Before building up a new frame, it's crucially important to ream/face the headtube and crown race seat (and the bottom bracket, if using press-fit cups). You should also ideally chase the threads of ...
2
votes
2answers
602 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
365 views

Bamboo Bike Frames

I've seen some bamboo bike frames out there in the world. I am curious as to how they ride? Is it similar to a steel, aluminum, or carbon fiber frame? Do you think it's worth the effort to build one ...
13
votes
8answers
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 ...
14
votes
9answers
6k views

How does a bike's weight affect the overall experience of owning it?

Naturally, carrying a light bike up the stairs is much more enjoyable compared to a heavier bike. Are there any other aspects of a bike which are affected by its weight? For example, would the weight ...
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 ...
5
votes
3answers
3k 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 ...
6
votes
5answers
3k views

Which type of frame is better for a touring bike, steel or aluminium?

I hear that a steel frame is more comfortable to ride for a long tour but that it is heavier and easier to rust than aluminum. Which material is better for a touring frame?
5
votes
2answers
790 views

Is it possible to compensate a short sized frame by adjusting seatpost and stem?

Could you achieve the same position you would have on a bigger frame by raising seatpost and stem? And how could I adjust those to "simulate" a bigger sized frame?
4
votes
1answer
297 views

How much does non-ideal frame size matter?

I have an opportunity to buy a barely-used Allez Elite for a very small amount of money (around $100). However, its frame size may be slightly different than the "ideal" size for me. If this ...
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 ...
13
votes
3answers
5k 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.
8
votes
3answers
815 views

Is there any difference between professionally painting a car and a bike frame?

I'm getting ready to purchase a new bike which I love but I hate the color scheme. I can't find any custom bike paint shops in the area. Can I simply take it to a car paint shop and get a ...
8
votes
7answers
17k views

What are the advantages and disadvantages of riding a smaller Mountain Bike frame?

I am 182cm (5' 11'') tall and am looking into buying a new frame for my mountain bike. Right now i have a 19'' frame and i found a good deal on a 17'' frame. The guy from the shop told me that it ...
8
votes
1answer
457 views

What's the definition of a Mixte?

What makes a mixte frame? Further, what's the etymology of 'mixte'?
7
votes
4answers
5k views

What should a big guy look for when buying a road bike?

I'm 6ft 4" (1.8m) and 22st (139kg). I do a fair bit of cycling, mainly spinning and mountain biking. I would like to get into road riding so I'm looking to buy a road bike. I want to spend between ...
6
votes
3answers
824 views

Is my derailleur hanger too bent?

I bent the derailleur hanger on my 9spd cassetted Bianchi Volpe about 1.5 yrs ago, and I just did it again, but worse. This time the derailleur got sucked into the wheel and really did a doozy with ...
5
votes
1answer
782 views

How feasible is it to transfer modern (2010) components to a 90s frame (road bike)

My 2010 aluminum frame may be toast (stripped bottom bracket) and I was considering getting an older chro-mo frame and transferring the components to it. It's a racing/sport style with drop bars and ...
4
votes
5answers
1k views

Don't integrated headsets wear out, ruining the frame?

I came upon this marvelous explanation of headset types. However, this got me wondering. Isn't the role of the headset cups similar to that of the derauler hanged - to not waste the frame as soon as ...
4
votes
3answers
467 views

Cable routing and why is there no optimum solution

This is a general question, regarding the routing of the cables of both brakes and derailleurs on a frame. I find it highly practical to mount all cables along the bottom of the top tube. This ...
4
votes
2answers
50k views

Frame sizing: “medium” vs. inches vs. centimeters

How in the world does 17-18 inches match up to 53-54 cm?? I was looking up bicycle sizing charts and found the ones on the Evans website interesting, if somewhat confusing. For example, see the ...
2
votes
2answers
136 views

I am having trouble identifying the manufacturer of this bike

What brand is this logo? Can anyone identify this?
2
votes
3answers
981 views

Vibrations in frame when pedaling

Recently, when I pedal sufficiently hard, I begin to feel vibrations through the whole frame of the bike. They are not so strong as to make the bike un-ridable, but neither are they road chatter. I ...
1
vote
2answers
96 views

Where can I find touch-up paint?

I need grey touch-up paint for the headtube on a 2014 Whyte T-129s. How can I find out which colour exactly to buy?
1
vote
2answers
754 views

FEM: How to Design weight-distribution in bike prototypes?

Inferio! No-one can understand this bloated question here, now more focussed. Suppose you are doing a new bike. How can you be certain that some critical point won't get too much force and the right ...