Bicycle frame construction, selection, maintenance, and repair.

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3
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2answers
148 views

Is it safe to ride a steel bike with a dented/buckled frame?

I just noticed, to my great sadness, a small-ish buckle/dent in my diagonal lower tube. (I'm riding a Cooper T200 single speed.) I just moved house; I hope I didn't do it. I probably did. It's about ...
1
vote
3answers
107 views

How do I make my frame water tight?

I am trying to remove the rust from inside my steel frame. There are, however, a few small holes in various places along the frame. Any tips on how I can make these water tight so that I can fill it ...
3
votes
2answers
82 views

Trek Aluminium Grade Comparison

Looking through the Trek archives, I see they have frame materials described as: Alpha Black Aluminum Alpha White Aluminum Alpha Gold Aluminum Gold Series Aluminum 100 Series Alpha Aluminum etc ...
2
votes
1answer
98 views

Linseed oil application to the inside of a steel frame

Is the application of linseed oil to the inside of a steel frame still recognized as a good way to prevent the formation of rust on the inside of the frame?
0
votes
1answer
63 views

Is there a way to remove the dent/bend?

I have a 2005 KHS Flite, which I am fairly sure is a Reynolds 520 frame, that I absolutely love and have morphed through many variations (the original brakeless fixie, then both breaks free-wheel, ...
5
votes
2answers
62k 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 ...
17
votes
5answers
1k 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
vote
1answer
78 views

2mm clearance between the chainstay and the rear tire

I use a pair of club roost cross terra (27 1 3/8) on a vintage raleigh bike (maybe it's raleigh record). Originally the bike had 27 1 1/4 tires. If I'm correct, 1 1/4 is 32mm wide and 1 3/8 is 35 mm ...
2
votes
1answer
3k views

Calculate frame stack and reach

Is is possible to calculate stack and reach for framesize 63?
4
votes
2answers
115 views

Size question. Performance v Comfort

I was checking some bikes on Decathlon (a large sports orientated chain store) and I found this size guide for some of their BTwin bikes. On their chart [pdf] that maps rider measurements to bike ...
3
votes
4answers
996 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 ...
0
votes
0answers
38 views

Finding out make and year of my bike

I was given this bike just days ago. On the bottom of the bike where the pedals are connected to the frame there are two numbers stamped in the frame. They are as follows... 661-475820 and 000637390. ...
1
vote
0answers
103 views

Schwinn Vestige no longer lights up; why not?

I have the Schwinn Vestige and a very long, bumpy, dirt/gravel driveway. A few weeks ago, we rode downtown and the frame lit up amazing, as it should. On the way home, it was not lit up. Hmm. After ...
0
votes
0answers
61 views

Who has information on this Fondriest Bike we found? Any good?

Does anyone here know anything about this old Fondriest bike? Thanks!
1
vote
4answers
564 views

Tough road or touring frame/bike

I recently had my bike destroyed by a car. I love cycling, and since I'm no longer a research fellow, I'm considering replacing it with a bike with great longevity (N.B. I know that until a process is ...
-2
votes
1answer
71 views

What is the correct frame size for me?

Well I want to buy this used giant escape 3 for a good price but the frame size seems to be a bit big. It is a shame though, Because it's at a great price. I am 5'7 and the Frame size is 23 inches. ...
0
votes
2answers
99 views

How to protect underneath the frame?

I've searched and only found this and this. But what I am really after is on a solution on how to cover/protect the underside of your frame. I have a carbon road bike with mostly a white painted ...
0
votes
0answers
104 views

What frame is this?

could you help to find out the brand, type, & year model of this MTB frame (attached) ? Best regards.
0
votes
1answer
95 views

would I be able to put new rear wheel with 12mm x 142 axle on my 2007 RM Element 70 frame?

would I be able to put new rear wheel with 12mm x 142 axle on my 2007 RM Element 70 frame in terms of dropouts compatibility?
2
votes
3answers
325 views

Does a high MTB seat post risk frame breaking

On a full suspension MTB, does a high seat post (extending from frame by 25cm, 10" or more) contribute to frame weakness, should one look to have a bike with a tall seat tube, or are MTB's designed ...
4
votes
3answers
4k 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) ...
1
vote
3answers
248 views

Is there a cheap touring bike that is as light as a road bike

I want a touring bike that is as light as a road bike - basically I want a road bike with a touring bike geometry - ie around 10 or 11Kg, excluding pannier racks, and other add-ons. My price range ...
1
vote
4answers
270 views

What are the practical limitations of a road bike compared to a mountain bike?

I grew up on a big box store mountain bike. I want to get a road bike for my commute, but I'm curious about the limitations I'll experience. I know the benefits of a road bike: lighter weight, less ...
0
votes
1answer
216 views

Does anyone know what kind of bike this is?

I found this bicycle a while back and have been planning on either fixing it up (if it's worth it) or selling it. All I have, really, is the frame. I haven't been able to find out exactly what it is ...
1
vote
1answer
93 views

Decal or paint?

Can someone tell me whether the visible part of the logo on the frame is a decal or a pain directly on the frame? If it's a decal, then where can one get a custom decal with a metallic finish? If ...
1
vote
3answers
284 views

safety of carbon fiber bonded to aluminum fork crown

I recently experienced the failure of the carbon fork on my 2001 K2 Mod3 road bike at 20 miles per hour. Yes, I was injured. My question is the bonding agent that secures the carbon fiber fork to the ...
-2
votes
1answer
6k views

How to tell what BMX frame I have?

How can I determine what kind of BMX frame I have if I there no decals on the bike when I got it? I got it from my dad who found the frame and we put it together, but I am clueless as to what brand or ...
0
votes
1answer
93 views

Behring custom made bike

Hoping someone can help me as I don't know much about bikes. I bought a 10 speed bike at a garage sale which the owner said was custom made by a bike maker in St. Louis, MO. She said the frame was ...
11
votes
1answer
2k views

Name that frame! (Likely Japanese, likely made in 1986, with known serial number, likely a Bianchi)

(This post was substanically edited/updated on 5/8/14.) I have a bike frame of unknown lineage. What is known: The serial number under the bottom bracket is IS513786. This fits with the serial ...
15
votes
4answers
11k 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 ...
2
votes
1answer
1k 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 ...
5
votes
1answer
352 views

Strange logo on the frame

I just bought this bike, but it seems like the frame is not Bianchi, all marks and texts are stickers. Also, there are quite a few logos on the frame. Does anyone know which frame this is? Thanks! ...
1
vote
1answer
41 views

Changing Frames

I just had a crash and wrecked my Cube hardtail mountain bike. Can I put all the parts, wheels, Reba Rock Shock, Shimano gears etc off my hard tail on to a full suspension frame?
26
votes
6answers
22k views

Why is carbon fiber inherently weak? Or is it?

This question got me to thinking: If it were possible for me to use a carbon frame, I would, but the expense and my riding style keep me using steel and aluminum. (I like hauling stuff on racks and ...
6
votes
1answer
255 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 ...
1
vote
3answers
121 views

Reuse oversized hardtrail frame to build a commuter bike? [duplicate]

I have a spare hardtrail frame which is too big (20.5") for me (5'7") for riding trails. Would it make sense to build a commuter bike for me as road/touring bike frames are generally larger than MTB? ...
0
votes
4answers
191 views

Bike too big for me

I bought a bike online based on a recommendation that a 56cm frame would be ok for me (I am 5ft 10, with 30" inside leg). However I think it is slightly too big. I have to lean forward a lot and my ...
2
votes
1answer
73 views

Can I swap my fixie frame and still keep all my old components?

I would like to change the frame of my fixie, it's too small for me now. It's a PureFix Bravo 50 cm, these are the specs. I would like to change the frame for a bigger one, a 54 or 58 cm one. Is it ...
5
votes
2answers
457 views

How bad is this fire damaged alloy frame?

I got this Shimano Ultra groupset bike for free, all I need now for it is shifters as the carbon and rubber melted in them and the original seat. But now I am wondering if I can get away with it, I ...
7
votes
3answers
3k views

Why offset the rear rim to the hub and not the hub in the frame?

I'm currently reading The Bicycle Wheel by Jobst Brandt, and I'm reading all of the issues with offsetting the rear rim toward the drive side of the hub... Asymmetry in a rear wheel built for a ...
4
votes
2answers
1k views

Is there much of a difference between flatland and park/street frames?

I am a newbie at biking, and I've been wanting to get into BMX for a few years, and I can now since I actually have some money. Primarily I've been wanting a 20" BMX bike with front and rear brakes ...
4
votes
3answers
342 views

Titanium frame has a crack - advice needed

I've found a Titanium bike frame on eBay. It's very cheap and the owner says that it has a very small crack on the seat tube where it connects to a bottom bracket. See at the image below: I've ...
1
vote
1answer
103 views

How to test the endurance of a frame?

I am planning on throwing a challenge to create a bamboo frame for a unicycle, but to declare a winner I shall test some endurance criteria. The frame should be able to withstand this kind of ...
7
votes
3answers
1k 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
4answers
322 views

What is this brown goop on my new bike frame?

I'm building a single speed bike, and ordered parts from various different places. My EAI Bareknuckle frame got delivered this morning, and it looks great, except for this part of the fork, that has ...
-1
votes
1answer
129 views

What differs between the Cervelo S5 and S5VWD

Looking at the Cervelo S5 series there are two different models but the Cervelo page offers no mention of what differences are.. could someone enlighten me? Looking just at the framesets is there a ...
1
vote
1answer
83 views

Where to buy (carbon) framesets? [closed]

I'm looking for online suppliers of carbon road framesets, the major online retailers Wiggle, Evanscycles and Chainreactioncycles don't seem to have much choice available (~<10 each) with low ...
1
vote
1answer
251 views

Carbon frame cracks

I have a 2010 Gary Fisher Cronus, when I brought the bike in for a tune up this spring the bike shop told me they wouldn't do it because of cracks around the seat post. They pointed out that I had my ...
4
votes
5answers
22k views

How to tell if a carbon frame is damaged or if the paint just has stress cracks

I am looking at a carbon framed road bikethat has me concerned.On the topside of the bottom bracket,drive side there is a very small hairline crack in the paint.The seller states that it has been ...
13
votes
9answers
5k 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 ...