Bicycle frame construction, selection, maintenance, and repair.

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8
votes
3answers
3k views

Is my derailleur hanger too bent?

I bent the (steel) derailleur hanger on my 9spd cassetted (steel) 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 ...
4
votes
3answers
7k views

What benefits does a tapered head tube afford?

I've just read a review of Tom Zirbel's Jamis Xenith SL on Bike Radar and flicking through the pictures there is one of the head tube with the following caption: Tom Zirbel's (Jamis Sutter Home) ...
2
votes
0answers
32 views

Is it safe to use aluminium seatpost adapter (27.2mm to 31.6mm) for a carbon frame?

I have Cane Creek Thudbuster Seastpost (aluminium) 27.2mm x 400mm which i want to use for a bike with a carbon frame (31.6mm seat-tube). I'm thinking about getting a seatpost adapter/shim from 27.2mm ...
4
votes
3answers
215 views

How much longer will my 10 year old frame last?

My friends say it will last forever, and not to worry about it. Online results show anywhere from two years to 25. I have no clue what to expect!! Let me give some context. I bought a decade old ...
0
votes
0answers
25 views

Does anyone know the model of this Legnano bike?

Hi everyone, I've recently just bought this bike for a really good price with the intention to work on it (a new paint job etc..) yet, I can't seem to figure out the model of the bike. I've done ...
37
votes
3answers
13k views

Why do men's bicycles have a top tube while women's bicycles don't?

Bicycles intended for men have a top tube that always hits me on that embrassing part when I brake. Conversely, women's bikes often don't have a top tube. Why is this?
-1
votes
0answers
50 views

Sourcing a cheap road bike frame [closed]

I'm looking to build a budget road bike for the girlfriend (154cms in height, 68cms leg) and i figured a frame would be a good place to start. The problem is that I'm on a budget, and don't really ...
10
votes
2answers
1k views

Frame with bottle cage boss ripped out - how serious is the damage?

I'm a huge fan of Greg Lemond so naturally when this frame showed up in my local Facebook page with just the frame and headset, no fork. I got very excited. The seller says that the bottle cage boss ...
0
votes
0answers
39 views

Can someone help me identify this Serotta model?

so I have recently acquired a Serotta bike from a friend of mine and am having a really hard time finding out what year and model it is. All I can seem to discover is that the frame is made by ...
2
votes
3answers
143 views

Crack in frame near forks

This is a Raleigh 06 grand prix. I've been trying to find a stem that gives me reasonable comfort. I ran a stem that didn't have the proper spacing and rode it a while observing a knocking sound with ...
1
vote
1answer
77 views

The name of my frame

Can you tell me what the name of this frame is? The handle is Philips.
24
votes
2answers
13k 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 frame....
2
votes
1answer
249 views

Size advice needed for Revolution Country Traveller touring bike

I'm about to by my first touring bike. I've got a very tight budget so I will probably order a Revolution Country Traveller from Edinburgh bicycle cooperation as it looks like it will suit my needs. ...
4
votes
3answers
167 views

Frame Or Paint Crack (Cannondale Super Six Carbon)

I am about to pull the trigger on a used 2012 Cannondale SuperSix bike. This would be my first bike and I'm very excited. However I am a bit concerned about some cracks. Seller claims paint is ...
2
votes
0answers
78 views

What kind of frame and brakes are these?

I just bought a bike and I can't figure out what kind of frame and brakes it has. I found that the derailleurs were made by DNB Japan somewhere around 1960 and that the handlebar is french (Guidonn ...
5
votes
2answers
238 views

Is it normal for seat stays on new CAAD12 frame to be slightly warped/not straight?

The seat stays on my brand new Cannondale CAAD12 frame are slightly warped (not straight and slightly different on both sides), especially around the welding spots for the rear brake mount. I could ...
15
votes
1answer
909 views

What is this frame feature for?

I have a Kinesis Tripster ATR. The drive-side seat stay has a lug on it whose purpose I can't work out: There's no such feature on the other seat stay. What is it for?
6
votes
3answers
683 views

Frame manufacturer not covering crack as saying it was crash damage

My Ti frame developed a huge crack in the frame a week or so ago. A pain I thought bit it'll be covered by warranty... The frame builder is now saying that it's crash damage. I really really doubt ...
1
vote
0answers
36 views

Fork trail vs chainstay length in steering

Is fork trail or chainstay length is a bigger determinant in the overall steering of the bike? Consider an arbitrary frame that I think is steers too slowly. I'm going to rebuild it because I want a ...
6
votes
3answers
187 views

What's the strongest way to bond a cable stop to an aluminum frame?

I recently picked up another well loved GT road bike frame- it's in great shape aside from a missing downtube cable stop. The model is a ZR 4000 probably from 1999, it's 7005 heat treated aluminum. My ...
-4
votes
0answers
60 views

Do you know this brand?

Hey I'm trying to find the name of this brand. It is a BMX Bike, I am familiar with most brands and their logos, but not this one. Can anyone help?
0
votes
2answers
183 views

Mongoose stamped vs. unstamped

What's the difference between a Mongoose that has logo stamped on frame and a Mongoose with no stamp on it?
3
votes
0answers
51 views

Uncut steerer tubes too short for 21" Frames

I am restoring two old bikes a 1996 Trek 8000 and 2000 Fuji Aloha. Both are 21" frames. The problem I am having is getting forks that do not cost $1000 and have steerer tubes with sufficient lengths. ...
0
votes
4answers
337 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
63 views

Unknown Balfa Road Bike

I have a Balfa road bike which I cannot find any information on or pictures anywhere. I would like some help identifying the bike model, the original parts, and the frame. What I have found so far: ...
1
vote
1answer
99 views

Bike Fit Confusion

A friend of mine has just purchased a 2016 Trek Emonda SL6 in a 54 cm frame size. He is 169cm tall and according to the Trek sizing chart (attached) he could fit a 52 cm or easily fit a 54. The ...
0
votes
1answer
52 views

Building a traveling bike, frames and components: where to buy in Europe [closed]

I am about to either buy either build a bike for medium-long travels, and I am struggling with differences between the european and american market offer (I live in France). Talking about the ...
3
votes
0answers
53 views

Internal cable routing blocked on '80s steel frame. What are my options?

I have a new-to-me ~80's steel frame with a rear derailleur cable that is routed through the chainstay. There's a blockage close to the BB end, and I'm wondering what my options are? My assumption is ...
5
votes
2answers
215 views

Should I ask for my money back - crack in Titanium frame

About 2 years ago I got my new bike - an Enigma Ti bike. The frame was customised for Di2 and I had hydraulic disk brakes fitted. An expensive bit of kit that was supposed to last forever and make my ...
5
votes
2answers
94 views

Steel Frame Creaks while Braking

My steel BSO has developed a creaking sound when I apply the front brake. I only hear it when I am beginning to brake, when there's not a lot of pressure being generated. I can recreate this sound by ...
15
votes
8answers
78k views

What are the differences between men's and women's bike frames?

Why do women's bikes have a diagonal bar in the frame instead of a horizontal frame? Is this the only difference? Sorry if this has been asked (but I cannot find it by searching) and I also just ...
0
votes
2answers
93 views

How do I bend my rear derailleur hanger (part of frame) back into place

Somehow I bent my rear derailleur hanger, how would one suggest bending it back into line? In my case the rear derailleur hanger forms part of the frame and therefore if I snap it when bending it back,...
1
vote
1answer
93 views

Are there any major drawbacks to using a track frame as a frame for a fixed-gear or single-speed commuter?

I follow a few communities which have a lot of fixie and single-speed riders. Most of the riding discussed is commuting around the city, and often, riders will show off their new bikes, upgraded ...
1
vote
1answer
76 views

Posture on mountain bike long term

I have been looking at sizing guides because I'm contemplating ordering a new bike and found out that I'm the totally wrong size for the bike I actually have. I'm normal proportions and 5 foot 7, but ...
3
votes
1answer
977 views

Lifting a road bike by one of the seat stays ok?

Is it ok to lift a road bike by one of the aluminium seat stays? Yesterday I realised I was doing this when inspecting the rear derailleur during a ride (front of the bike facing down, all the weight ...
1
vote
4answers
3k views

Is this aluminum “rust” in my frame?

I found an aluminum bike in the trash and it seems like it has been exposed to the rain, especially because some of the metal is slightly rusty. The frame is a different thing, because altough it is ...
0
votes
1answer
202 views

What kind of bike is this

Good day. Need help regarding a bike I found. No idea what kind of bike it is, does it have value or not, and could I have it restored with its current condition? Any idea/information about this bike ...
3
votes
8answers
32k views

How can you remove logos from a bike frame?

I'm trying to remove all these annoying labels from my bike. On the main frame there is one big logo, but I'm not sure if it's a sticker or not. The frame is black, but it's very cheaply made, and the ...
1
vote
1answer
48 views

How do I keep smallest gear on my crank shaft from contacting frame

I have an old Trek 8000 ZX that I am fixing up. I had to replace the bottom bracket and I believe I successfully did that. The bike did not have a crank set to work with so I salvaged one from a pile ...
0
votes
1answer
58 views

Single speed dirt jump specific frame for general riding

I am in the market for a new bike and come from a background of mainly cross country (XC) / all mountain (AM) type riding but have ridden BMX also in the past. I'm not averse to standing up and only ...
1
vote
2answers
48 views

How can I treat an aluminium frame ready for restoration?

I have an old aluminium framed mountain bike which has developed some 'oxidation / corrosion' underneath the lacquer -- it kind of looks like little white worms! The frame as original has a nice ...
12
votes
3answers
640 views

What is this spring between the fork and the frame?

Sometimes on a bike I see a short spring, most often covered in rubber, connecting the fork with the frame: What is the purpose of it? The only thing that comes to mind is stabilising the fork so it ...
-1
votes
1answer
119 views

how can i determine the model of dyno bike i have

I have a dyno vfr 3d dropout flat oval bike. How can I find out what it is? The serial number is S9ET18105.
4
votes
1answer
153 views

Denied warranty claim on carbon bike due to impact?

I saw a little crack on the bottom section top tube of bike which is a kestrel talon. I took it the bike shop to see if it was covered under warranty. I have fallen once or twice from the bike but I ...
4
votes
1answer
84 views

My santa cruz heckler ghost shifts from frame flex. Is there anything I can do?

I just bought a 2013 heckler used and found that it ghost shifts under heavy pedaling. I weight 230 so I am probably putting more pressure than average. But this only happens when I have smallest cog ...
7
votes
4answers
2k views

Should I Get the Paint Job Touched Up

My wife's bike recently got scraped up and the paint got scratched down to the frame. It's an alloy frame. Should she be concerned about rust or any kind of damage? If so, do we need to get it ...
3
votes
1answer
3k views

Is it possible to run standard mechanical shifting on a Scott Foil Premium frame?

The Scott Foil Premium is the highest end frame available from Scott Sports, and it is designed to run an electronic drive train, routed internally. The original reports were that this frame would be ...
0
votes
3answers
182 views

Can I use a hardtail for MTB trail riding?

So, I have a tight budget of 600 USD. Now, I just wanted to say that I live in a big city, but I do want to ride trails more often. My intended use with the bike is to ride trails, and perform ...
10
votes
3answers
10k views

How many years an aluminium frame lasts in a touring bike?

How long does an aluminium frame lasts in a touring bike? [Removed extra questions to be clear.] Background So far I preferred aluminium vs. steel for many reasons, but if steel lasts ...
1
vote
4answers
390 views

Creaking sounds from the saddle tube?

I've started to hear creaking/clicking sounds from the saddle tube. Is the frame giving up? I could look for a longer saddle post, if that would relieve some of the strain on this part of the frame, ...