Bicycle frame construction, selection, maintenance, and repair.

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3
votes
1answer
63 views

Dual crown fork or not?

I currently own a 2015 GT Verb Expert. And after watching a Red Bull rampage video I started wondering can I put a 200mm fork on my Verb Expert. Or does my head tube need to be more angled. And is it ...
2
votes
1answer
105 views

How to build a lugged fork [closed]

I have an idea to build a carbon fork with aluminium joints. I don't have any experience in frame building but I want to read about it somewhere. Is there any good literature about how to build a bike ...
6
votes
2answers
191 views

Should I worry about rain getting inside my frame?

I commute to work every day and lock my bike on the street. I have a nice saddle so I remove my seat post and take it into work with me. This obviously leaves a hole open to the inside of the ...
4
votes
3answers
196 views

Bicycle frame identify HELP

A few day ago I got this bike from a friend for a restoration. He thinks it's bianchi but I am sure it's not. It has Wienman brakes, simplex derailleurs, 3ttt steam, ofmega hubs and ofmega crankset. ...
6
votes
2answers
126 views

Lugged carbon frame repair

In broad terms, I'm wondering if it is possible to repair a high quality lugged carbon frame, say a Colnago C60, that has been cracked in the top and/or down-tube. Normally once a carbon frame has a ...
0
votes
1answer
92 views

What is the best gear ratio for speed on 20inch frame [closed]

I'm trying to figure out the best gear ratio for my 20 inch frame
4
votes
3answers
893 views

optimum frame size for very small 5'2" female

I have a lady friend who's interested in getting into road cycling. The smallest frame sizes I've seen so far in the market are 48 and, in one instance, a 47. Is this about the most common and/or ...
1
vote
1answer
81 views

I just bought a frame off this kid in my neighborhood but don't know who makes it?

I bought this frame off a kid in my neighborhood for 100$. I looked like a cool freestyle frame. I built the bike up and just wanted to know if anybody had a clue to what company makes this frame? ...
4
votes
1answer
134 views

When to change road bike

I own this Fuij Roubaix 2008 model road bike, its an aluminium frame with carbon front and rear forks. I already did 25000km on the bike and replaced wheels, chainring, a couple of cassettes, chains ...
4
votes
1answer
558 views

Am I too tall to bother modifying my old trek?

I bought an old Trek 500 series road bike a couple months ago and have put love and parts into it but it's just too damn small for me (I'm 6'4"). All the post adjustments are at their safest limits. ...
4
votes
2answers
131 views

Seat Stay Replacement - Bridgestone MB-3

I am working to restore my first mountain bike frame, a "vintage" 1993 Bridgestone MB-3. Early on, I swedged the left seat stay so that it buckled a bit & rotated about 15 degrees inward. I have ...
0
votes
1answer
231 views

Why are post ~'80s bike finishes so “dull”?

It seems that (with some notable exceptions) bikes from about the '80s and earlier seem to have more pleasing finishes than later bikes-- is there a verifiable reason for this, either economically or ...
8
votes
2answers
238 views

How to carry a step-through/mixte bike

How can one carry a bike with a step-through/mixte frame effectively?-- In comparison, any diamond-frame bike is a breeze for me to shoulder regardless of weight (okay, carrying a 25+-kg roadster is ...
1
vote
2answers
421 views

25 degree rise stem vs 6 degree rise stem with taller head tube - how is handling affected?

All, I’m shopping for a new road bike with endurance geometry (more upright position and shorter top tube), 9mm drop saddle-to-bars. I’ve had a Guru fit done by a professional fitter. The main ...
0
votes
1answer
76 views

Comfort vs comfort [closed]

New to the sport of cycling and considering two bikes. The Domane trek 4.3 Disc 2015 and the Domane 4.3 trek 2014 . It's for a 120 km event. Which would give more body comfort in such a distance ? I'...
3
votes
3answers
263 views

Can an aluminium frame rust from the inside if water has been in it for some time?

My bike has been sitting out in the open for a few months due to lack of space. When I finally decided to strip it down and bring it inside, a lot of water came out of the frame. It could have been ...
1
vote
1answer
84 views

[MTB ]How much can my bike endure? [closed]

I recently bought a (Mountainbike) Bergamont Revox 3.0 and I'm concerned that I'm not taking proper care of it. I want to know if I can, for example, ride down a flight of stairs or switch the gears ...
5
votes
4answers
980 views

Advantages of mounting bottle under frame

I'm wondering if there are any advantages to mounting ones water-bottle on the bottom of the down tube, near the ground, versus on top of the tube. I'm mainly interested in the advantages, or lack ...
-1
votes
2answers
95 views

Identify: 26in dirt jumper/bmx bike “fetish” brand?

I bought a 26in dirt jumper/bmx bike. No markings but the guy said it was a fetish. The set up is bmx but the frame looks like a jumper. Bmx cranks and dropouts. The serial number is SNFSD13BF1725.
3
votes
5answers
296 views

How long will this alum frame last?

I picked up this very cool 96-97 GT rage from Craigslist with the intention of restoration- a few rusty pinch bolts, spider eggs in the brake hoods, grinding bearings and pitted races, and all the ...
-1
votes
1answer
95 views

Can anyone identify this bike please?

I bought this bike at a police auction and it is all aluminium and I was told it is a track bike. The serial number under the frame is VISP120888 OR V1SP120889 On the crank it has 1R9CBA and R9FAA ...
4
votes
2answers
131 views

Brompton pump mount?

I have recently acquired a Brompton, which came with this zefal pump, which doesn't clip onto the frame: The rear frame on my Brompton doesn't appear to have the cage-like mounts that new models ...
0
votes
2answers
156 views

What are the advantages of having a aluminium frame? [duplicate]

are there any advantages that an aluminium body brings to the tables over carbon frames?
0
votes
1answer
124 views

Pitted rust on frame [duplicate]

Hello I have some small pitts of rust on my 1980 Raleigh royal frame. I don't want to strip the paint and sand blast it are there any non invasive treatments? Some of the chrome surfaces also appear ...
0
votes
4answers
150 views

Are 29“ and 26” bikes come with different size frames?

I am going to buy a cycle. In this regard I got my framesize 20". Now I would like to know is it for 26er or 29er ?? Is frame size will be different for 29er and 26er ?? I am going to buy a GT ...
3
votes
3answers
663 views

What's this part of the bike, and is it safe to alter it?

The video shows someone installing a gps bike tracker, however there is not much room in the top of the head tube, so he hammers down what's already in there in order to make room for the tracker. In ...
0
votes
1answer
80 views

How to fit forks to fixie frame [closed]

I have just ordered a fixie frame with no forks. I will need to order a set of forks and cut them correctly (to the right size) so I can install my headset. Are there any tips/ tutorials on how to ...
5
votes
2answers
190 views

How to stop the corrosion?

I have a silly question maybe.. How to protect the frame of my bike from corrosion? The bike is not new. Are there any accessories? Thanks
2
votes
1answer
303 views

chain stay protection on carbon frames

I am worrying about this type of protection against chain sucks. After 1-2 months with a new Cannondale F29 2, I've found out that this part was not where it should be. Instead, the chain did it's ...
1
vote
1answer
58 views

DIY Bamboo bike? [duplicate]

I am wondering whether or not I can build my own bike. I was thinking of buying some steel lugs or maybe carbon ones or whatever off the internet, and a steerer tube too, and was hoping I could ...
1
vote
2answers
806 views

What is the weight difference between frame sizes?

I was wondering if any one has an idea of how much more weight a larger size bike weighs. Specifically S-works Tarmac. So for example what would the difference in weight be between a 56 compared to a ...
0
votes
2answers
252 views

Can anyone help me identify my bike please?

Can anyone help me identify my bike please? It has a slight story attached as it was one of the bikes in the new Lance Armstrong film. It was badged up as a Gazelle TVM (and as far as I can see, re-...
1
vote
1answer
279 views

What model and year is this bike?

What model and year is this bike? Stickers/Decals say Cannondale but not 100% sure if it is. I have looked at catalogues of cannondale from 1997 to 2010 and can't see this bike. If anyone could help ...
3
votes
1answer
143 views

Understanding the bike geometry through riding [closed]

Though this question has been asked a lot of times, and there are very good answers out there, all the answers talk about the effect of individual parameters in isolation. That is, they take trail, ...
7
votes
4answers
689 views

To Cold Set or Not To Cold Set?

I have a Trek 620 (Reynolds 531 lugged steel frame) from the mid-80s the rear dropouts are spaced at 126 mm. I'd like to be able to run an 8- or 9-speed cassette and I was wondering about the issues ...
0
votes
1answer
47 views

How to exchange a seat stray on a 2013 Cube AMS 150 Super HPC Race carbon bike?

The derailleur was torn apart so I ordered new seat stays and have to exchange (one of them). I'm not sure how to do it, there are some bearings fastened by screws where hex-wrenches seem to fit on ...
6
votes
4answers
170 views

Fracture in folding frame - safe to ride?

I cycle every day because I live in a city and I find it a fun, fit and convenient mode of transport. I am not a cycling hobbyist, am only averagely fit and know pretty much nothing about bike ...
5
votes
1answer
138 views

How is a frame designed for an easy step-thru?

My question is very specific towards bikes which have a curved top-tube. How is it decided that a particular height of the top tube above the ground for a set of people in a certain height range is ...
3
votes
1answer
163 views

New trend of seat stay for road bike?

I have seen quiet a few road bike with a Z-shape seat stay until now, e.g. specialized Roubaix Does it serve any purpose? What's the advantage of this design in comparison to a straight-bar seat stay?...
13
votes
5answers
5k views

Can the top tube on a mens bike be cut off?

I want to cut the crossbar on a mens bike to make it easier to get on and off. Will it damage the bike?
4
votes
1answer
200 views

What caused this seat clamp / frame failure?

Here's my "long distance" ride, which is an old steel MTB without suspension. I picked it up by the saddle to move it and felt some play, I thought the saddle rails might have been loose, but as per ...
0
votes
2answers
322 views

Lemond Frame - what model/year?

I bought this Lemond frame online. I have an opportunity to get some components for it before I actually receive the frame. Hoping to get more info on the bike (model/year) in the hope of getting some ...
1
vote
1answer
235 views

How much is a mass production aluminium frame worth? [closed]

There are several entry level bikes under $600. I actually own one, an excellent Felt F95. I was just curious, how much is a frame of such a bicycle worth? In total, what is the cost of a frame in a ...
0
votes
2answers
1k views

I am 182 cm tall. Is a road bike with a frame height 54cm good for me? [duplicate]

I have an option to buy a road bike that has the height of the frame 54 cm : https://www.willhaben.at/iad/kaufen-und-verkaufen/sport-sportgeraete/top-rennrad-ktm-strada-nur-9-3-kg-alles-shimano-...
1
vote
1answer
295 views

Is it possible to buy a frameset from Trek that isn't listed separately?

I am thinking of buying a Trek CrossRip or 720 touring bike, but I want it with Ultegra Di2 and the bikes are only listed on the Trek website with lower-end components. So I'd like to buy a frameset ...
6
votes
1answer
424 views

3D printing frames?

Are there any technical limitations that make 3D printing frames impractical? And, if it is just a matter of time before our technology is able to overcome any limitations (like manufacturing ...
4
votes
4answers
582 views

What is the purpose of a serial number?

It seems like pretty much everywhere I look, serial numbers can't do the things that it seems they should be able to do. They can't help people figure out what bike they have. They can't help at all ...
0
votes
1answer
82 views

How do i figure out the maker of my bike?

There are no words on it, it is a chrome frame and the only markings i found on it were a serial number that reads G1109025563. Is there any way i can get any information on it?
1
vote
1answer
194 views

What steps to take to replace bike frame

I've always known my bike frame was too big for me. I got a great deal on the whole bike when I bought it seven years ago. It was an S-Works, probably from the '90s, with all Ultegra gear in great ...
0
votes
1answer
65 views

Spraying frame of GT Transeo

I've got a GT Transeo 1.0 bike (bought in 2011 or 2010 as best as I can remember) and I'd like to try painting the frame to get rid of some (very minor) surface rust and paint damage. I've read a ...