Bicycle frame construction, selection, maintenance, and repair.

learn more… | top users | synonyms (2)

1
vote
3answers
319 views

restoring the finish of an oxidized polished aluminum frame?

In the context of restoring the finish of an oxidized once-polished aluminum finish, is there anything better (easier) than 0000 steel wool with Marvel Mystery Oil? I am restoring an old Cannondale ...
2
votes
2answers
203 views

Carbon frame strengh

Almost every question Bicycles.SE about damaged carbon frames seems to get the same answer: "the frame isn't safe anymore." How strong of a hit is needed to break a carbon frame? There are little ...
1
vote
1answer
407 views

What is the frame called that fits 700c wheels?

I have a set of 700c wheels and am looking to buy a used frame. I want a frame that fits the 700c tires so I don't have to file down the front dropouts or use long reach brakes. What are the frames ...
4
votes
3answers
245 views

Down tube and seat stay

I've noticed that in a lot of bikes (though certainly not all), the seat stay and the down tube are parallel or nearly so. Is there any structural reason why a manufacturer might make that choice or ...
1
vote
2answers
268 views

Cannondale six13 52cm Carbon top tube?

One for the Cannondale nuts: I've got a real soft spot for the Cannondale six13 and have been after one for ages. A 52cm has popped up for sale which would be ideal but I've noticed that it has a ...
1
vote
2answers
244 views

Building a 36er bike [closed]

I'm casually researching building a 36er bike, preferably mountainbike style. I'm looking for the experience of others on this. I would like to own it more for curiosity sake than any other, but would ...
2
votes
2answers
223 views

Bike frame measurements

I'm 6'2 and ride an XL hardtail. I found a killer deal for a full suspension that is a Large frame. Since I am basically right in the middle of large and xl frames would it work riding a large? I'm ...
0
votes
1answer
83 views

Y-Foil Frames Rear Suspension?

I have a few questions about the Y-Foil frame (beam frame) Firstly as far as i have seen, there is no rear suspension system, does the fact that there is no seat tube offer suspension and dampening, ...
1
vote
2answers
588 views

Knowing what bicycle frame material I have

I have a bicycle frame that's really heavy. It's a mountain bike frame with shocks, so I decided to replace the entire frame with a city bike aluminum frame(I only use the bike if I have to pick ...
1
vote
1answer
143 views

measure dropout to fit chain tug

I want to buy a chain tensioner, like the one in the first picture in this answer. I did some research and it looks like they have different size, according to what they call "dropout size". In fact, ...
-1
votes
1answer
219 views

Is there a best suspension frame? [closed]

According to Wikipedia Trek holds two of the several suspension frame designs, and uses them both (combined) on their mountain bikes. The technologies are EVO link and Full Floater, being claimed to ...
1
vote
1answer
415 views

What make is my BMX frame?

I have a BMX forsale, but I would like to know what make the frame is so I can determine how much it is worth. Does anyone recognise this symbol on the frame? Thanks for your help Jon
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
1answer
71 views

rebuilding/frankenbike query

My son (teenager) has a second-hand Zombie bmx style bike - it's designed for kids, but as far as I can see the frame size is the same as any bmx. It needed a bit of messing around with, I've already ...
5
votes
1answer
168 views

Why would higher fork contribute significantly to breaking the frame?

When I recently cracked my frame near the headtube, every bike shop that I went to, asked me explicitly "Did you put a longer travel fork?". Putting aside that apparently fork travel and fork crown ...
3
votes
2answers
394 views

What would be the handling of a bike with reversed stem?

There are short and long stems: What effect does changing the stem length have on my bikes handling There are flat bars and there are curved back bars for comfort upright position: There even ...
5
votes
1answer
257 views

Repairing Carbon / Aluminum frame

My road bike is aluminum with a carbon rear triangle. The carbon rear slides into the aluminum, and I believe was bonded with some sort of epoxy. The pieces have begun to separate after 2.5 years ...
4
votes
4answers
203 views

Alternative uses for an aluminum MTB frame

Any alternative use for old mountain bike tyres and inner tube? So my frame has a large crack near the headtube and I am replacing it. Could I use the frame in any other way? E.g. give it away ...
8
votes
1answer
305 views

Help please to identify my Tandem

I have just purchased an old tandem, but don't know the make or year. Can anyone help me to identify it. The frame is steel and it has a frame number of 452599. There are no decals fitted but I attach ...
1
vote
1answer
195 views

May I ignore the frame damage (or should I get a budget carbon frame)

I was happily using my Canonndale F5 Hardtail to commute to work and other places (like shopping, going to a swimming pool and the like) until recently I had a very unfortunate accident with a car. To ...
6
votes
3answers
907 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
246 views

S shaped down tube (MTB)

Are there any advantages of S shaped down tubes over the traditional ones on MTB? For example: what do you think of this design? Jamis Exile Comp 2013
1
vote
2answers
354 views

top tube angle on steel and carbon road bikes

You generally see the top tube on steel bikes being parallel to the ground, whereas on a lot of carbon bikes it's angled. Why is that? (my observations are obviously limited, but it seems like a ...
1
vote
2answers
359 views

How to judge BB height visually and the effect on handling?

Is it possible by viewing a bike frame to tell roughly what the handling of the bike is going to be? This current question is about bottom bracket height in the above mentioned respect. I have ...
4
votes
5answers
2k 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 ...
9
votes
3answers
1k views

Should or can I (car) wax my frame?

Having spent the whole summer taking a bike apart, painting it and now in the process of building it again, I was thinking about waxing it. I want the finish to last as long as possible, after all, ...
0
votes
1answer
471 views

Fort bicycles company from Czech Republic: Where are the steel frames? Company renamed?

There is or was a company from Czech Republic that produced steel frames and forks. The name of this company is or was Fort. Why can’t I find anything about this company or their steel frames and ...
-1
votes
1answer
132 views

Replacing a road bike frame [closed]

I have a 2002 Calfee carbon fiber frame, with aobut 45,000 miles. If I replace it with a new one, what improvements can I expect? I have no complaints about the frame, other than a poor paint job.
15
votes
4answers
985 views

Why the penny-farthing?

The penny-farthing was the standard until the diamond-frame "safety bike" was "invented" and revolutionalized the world of bikes. It seems to me strange to have to "invent" to put the same size of ...
-1
votes
2answers
454 views

What is the right (best) bike for me? [closed]

RE: Disabled Vet, out of condition and trying to buy a bike I started biking back in 1985 and have been out of biking almost 20 years. I was fairly savvy on the equipment of the day. It's changed ...
5
votes
1answer
448 views

What is the significance of rear travel of a frame?

Every suspension frame has the the following two parameters: shock travel and rear axle travel at maximum shock compression. I have a lot of questions, regarding those two: What are they properly ...
5
votes
3answers
2k views

what type of bike/frame to use when overweight?

I'm around 230lbs. Since I do enjoy biking, I was looking up old school racing bikes on craigslist. Some of the frames are built with "Tange 1" steel which specify weight limits (180lbs). Is it really ...
0
votes
2answers
232 views

A bike smaller than is recommended

I have 180cm and the recommended size for me is 58cm or so, which i already have, a classic Peugeot racing bike. Works relatively ok but i found that i ride it better when i'm leaning forward and keep ...
2
votes
1answer
206 views

damage to carbon road frame at the seat stay and drop out junction

I just had a crash due to hitting a dog. My carbon fiber frame now has chip the size of a dime at the junction of the seat stay and drop out on the drive side. Should I be concerned about frame ...
2
votes
1answer
736 views

What defines a “compact” road bike?

I've been reading a lot about road bikes and looking at the differences between bikes called "compacts" but I don't see much consistency. I've read that compact road bikes have different gearing and ...
4
votes
3answers
2k views

Attach bottle cage to frame w/o mount screws

I'm planning on getting a bottle cage for my bike, but my bike does not have the standard mount screws for one. As I understand it, there are two types of cages: bolted cages and clamped cages. I'd ...
0
votes
1answer
927 views

What's an “Auto-Mini” folding bike? Can I use one for decades without having to replace the frame?

I've been thinking of buying an internally-geared folding bike for commuting (5 km each way) and errands. I want to spend $100-$200, but I want a reasonable-quality frame; I don't want to ever have to ...
0
votes
2answers
179 views

I need to change my bike from UK to US Spec

I bought a bike from the UK. The brakes and shifters are on the opposite sides. I want to change it so the front brake is on the left and the rear is on the right, Same thing for the shifters. I ...
1
vote
1answer
103 views

Any special issues with putting a larger internal gear hub on a smaller frame?

Can I safely put my 130mm internal geared hub on a 126mm spaced aluminum frame by forcing it? What are the consequences? How would the IGH be "damaged" by this? My IGH hub has a wheel laced and ...
5
votes
1answer
493 views

What bike do I have?

I have recently purchased a bicycle from a second hand shop. It seems to have all sorts of different parts. The frame however has a badge and markings of 'Kontroll' made in West Germany. Doing some ...
2
votes
2answers
577 views

Saddle or frame shape for painful Coccyx?

As a child I was very active, and in a weight-lifting injury I damaged my Coccyx, making it very difficult to sit in the same position for long periods of time. As such, bicycling, what once was a ...
3
votes
1answer
2k views

How to calculate bike stand-over height using frameset geometry and wheel radius?

While it's best to buy through fitting a bike in store, it's not always possible (discussed here). On some websites, the stand-over height of a bike may not be listed as part of the specifications. ...
4
votes
2answers
304 views

Does frame size inside a particular model affect the ride characteristics of the bike?

I read an article stating that the smallest of a particular model of bicycle doesn't fully reflect the original design concept of the model when I was about to buy the smallest (430mm seat tube) of ...
-2
votes
1answer
217 views

Can anyone identify this frame?

I've recently picked up a 'beach cruiser' frame from a local free-add site. It was claimed to be a Huffy, however I can't seem to verify this (I've emailed Huffy and I'm awaiting their response, and ...
4
votes
1answer
353 views

Can i stop my frame scratching my seatpost?

I have an On-One Scandal aluminium frame, into which i have put a carbon seatpost. I have been adjusting it to find the right height, and i have noticed that it is getting seriously scratched - see a ...
1
vote
1answer
741 views

Rear tire has started rubbing frame at one spot

Riding my bike within my suburban residential neighborhood, I felt a shock, like a snap although I don't think anything snapped, followed by a rubbing noise every few seconds. Pedaling and the brakes ...
2
votes
1answer
86 views

Could paint build up on a bottom bracket be considered a warranty issue?

On Saturday I received the new frame for a steel xc bike I'm building up. I went to start on the weekend but noticed a large paint build up on the bottom bracket. The build up is about 15x3mm (don't ...
1
vote
1answer
206 views

Derailleur Hanger replacement for GTS R5 road bike frame

I'm looking for an online site where I can buy a derailleur hanger replacement for my GTS R5 road frame. The frame is the one in the picture ...
0
votes
0answers
45 views

Is it cost effective to purchase a frame and components separately? [duplicate]

I was looking to buy a new MTB and was wondering if a purchase of a frame and components separately was cheaper then buying a bike with everything? I would assembling everything myself instead of a ...
-3
votes
1answer
338 views

Would a 53 cm track(cinelli mash bolt) frame fit a 6'0" tall guy? [duplicate]

I want to buy a friends but I'm not sure it will fit me