Bicycle frame construction, selection, maintenance, and repair.

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2answers
321 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
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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
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3answers
246 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
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1answer
83 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
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4answers
835 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 ...
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2answers
90 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
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5answers
268 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 ...
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1answer
93 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
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2answers
118 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 ...
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2answers
147 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?
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1answer
103 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 ...
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4answers
135 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 ...
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3answers
660 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
76 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
183 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
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1answer
283 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
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1answer
55 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
663 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 ...
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2answers
239 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
252 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
140 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
647 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
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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
164 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
133 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
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1answer
157 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?...
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5answers
4k 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
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1answer
184 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
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2answers
276 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
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1answer
227 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
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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
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1answer
278 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 ...
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1answer
423 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 ...
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4answers
483 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
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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?
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1answer
165 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
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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 ...
1
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0answers
146 views

anyone know what kind of frame this is? [closed]

Can anyone identify this bike frame? I'm thinking it was stolen, painted, and is being sold on a website, so I was hoping to do a search on a stolen bike database. The original color looks to be ...
5
votes
5answers
412 views

How to estimate price of an old CrMo frame?

So it happened. My old good CrMo friend got hit by a car and the blow was heavy enough to affect the whole frame. Now the car driver is expected to pay back the expenses but I am not sure how to ...
0
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1answer
136 views

Tapered suspension fork on a 2003 Surly Karate Monkey frame

Is there any way I can run a modern tapered 1 1/2" to 1 1/8" tapered suspension fork on a 2003 Surly Karate Monkey (Original frame style with V-brake and Disc Brake Mounts). I think it only works with ...
0
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4answers
302 views

MInor (I think) dent in top of Orbea Alma top tube - frame ok or no?

UPDATE: My lbs mech / owner (same guy) looked at it this AM, says it is good to go, 'ride the hell out of it', he 100% backs it up. And FWIW re: the specifics of this frame and why it's purely ...
2
votes
1answer
318 views

Can a bike frame be retrofitted with internal cable routing without Disassembly?

Would I be able to have a local framebuilder retrofit an existing steel mountain bike frame to install internally routed cable guides on the top tube without disassembling the frame? I would probably ...
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3answers
95 views

Safe to shorten a dual-pivot caliper mounting nut?

I have a 2006 Specialized Langster. Unfortunately the brake bridge is not deep enough to insert the shortest caliper mounting nut I could find (10mm). The head of the nut should insert all of the way ...
3
votes
1answer
354 views

What is the cost saving from manufacturing bikes in China vs USA or Taiwan?

I went to a bike shop recently and was surprised to see big "Made in China" stamps on the Trek mountain bikes. I did some research and apparently all the big bike makers manufacture in China now. I ...
1
vote
1answer
470 views

How to repair a broken steel frame, at the rear drop out /chainstay location

I have a Raleigh technium , recently broke at the rear dropout. Angelo had a post w a picture of a broken rear dropout and commented, that this failure on a steel frame was totally repairable, btw......
1
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1answer
66 views

Have some new parts on hand but need new frame - frame swap reasonable? or sell and purchase new bike?

Purchased my first "decent" bike, a Motobecane 700HT about 5-6 years ago as a 'gateway drug' of sorts for myself to get into XC biking. Ended up using it for commuting for a few years as well. Over ...
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2answers
106 views

Fort Frame head tube cracked

I have raced my Fort Bike for some time now. The head tube holding the forks has split /cracked open. What do I do now, who do I contact ? Dennis
3
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1answer
280 views

Bicycle Frame: anodized Aluminium?

I need help with identify what materials is this frame I need to know if this is indeed aluminium? (weight 1.2 kg for 15 inch frame hybrid, is not ferromagnetic). If it is, why would it have a ...
1
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4answers
2k views

Disadvantages of Riding Larger Frame Sized Bike than Reccomended Frame Sized Bike

I unconsciously bought a bike which's frame size is larger than recommended. (My height is 163cm bikes frame size is for people 174-190cm) (I dont have any problems with reaching ground with my feet ...
4
votes
3answers
2k views

Convert old road bike to comfortable commuter

I have an rather old road bike, that I'd like to convert to a comfortable commuting bike. The bike should be used for everyday commuting (< 5km) and occasionally day tours. I'd like to keep the old ...