Bicycle frame construction, selection, maintenance, and repair.

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4answers
2k views

Is there a quality alternative to powder coating when it comes to repainting a steel frame?

I'm not a paint expert and want to make a choice that will last a few years. I know that powder coating will last a long time, but I'm restoring an older bike and don't want to spend too much. Maybe ...
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3answers
292 views

Could you make a bike frame out of 24kt gold?

Obviously it's a silly idea. Apart from the cost, it's far too dense and not stiff enough to be a good frame material. What I'm asking is would it be possible to make a ridable from gold? What ...
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5answers
465 views

What type of bike is appropiate for my situation?

First off, sorry for being unable to phrase my question more precisely. Currently, I ride a 26" hardtail mountain/trail bike to and from work/university (around 7km each way). Surely, this is not the ...
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4answers
323 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 ...
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2answers
591 views

How to build a fixie bike? [closed]

I’m thinking about building a fixie and was wondering what are the best types of frame, wheels etc to use and how long the whole building process may take?
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3answers
433 views

Skid on small frame

I bought a new, cheap and maybe nasty fixed gear bike. They were only in sizes 54cm and 56cm, so I had to go for 56cm, even though my road bike is 61cm and I'm 186cm. My first few skidding attempts ...
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1answer
2k 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 ...
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2answers
940 views

Why does a bike frame have to be above 56 cm usually to fit 700c tires?

I first came across this when I was looking at the Surly LHT, but I started to see it everywhere. It seems to me they can just put on a longer fork or something, or is it more for the back wheel?
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2answers
216 views

What is the measurement in inches of a XL frame?

What is the conversion of a (XL) frame to it's measurement in inches?
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4answers
676 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 ...
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2answers
599 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 ...
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3answers
1k views

Is it safe to ride with bent fork?

My bicycle went from this when I bought it: To this when I crashed (note the front fork bent where it attaches to the stem; front wheel almost touches the down tube): Update: Just looked at the ...
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3answers
130 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 ...
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1answer
144 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 ...
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9answers
7k views

Are there any manufacturers of steel road bikes today? [closed]

Is there any major bike manufacturer that still makes steel road bikes today? The frame of my old Bridgestone got cracked and the crack is too close to the alloy BB lug for me to be able to weld it. I ...
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2answers
612 views

How to convert 17“ bike to 18” without changing frame

I bought Author Basic (2012) with 17" frame. But I have some back aches after 2 or more hours of cycling (just cycling or with little jumpings) and sometimes I feel little unsure while riding ...
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2answers
318 views

Can a tandem's front bottom bracket fail catastrophically?

Many tandems have a front bottom bracket that looks like this: The front bottom bracket is mounted off-centre in an aluminum shell called "the eccentric." When the pinch bolts shown in the ...
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3answers
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 ...
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1answer
95 views

Swapping a road bike frame for a bigger one?

I happened to be given a decent bike - Trek 1000 - in a good condition. The only problem is that the frame is only 56 cm while I am quite tall so I need ~62 cm. Is it possible to take all the nice ...
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1answer
122 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 ...
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2answers
208 views

Where can I find touch-up paint?

I need grey touch-up paint for the headtube on a 2014 Whyte T-129s. How can I find out which colour exactly to buy?
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2answers
2k views

Does anyone have experience with Bottom Bracket Tap/Facing sets?

I'm interested in recommending my boss get the workshop in which I work a bottom bracket tap and facing set. As it's quite an investment it's important to me to know what you're getting for your ...
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2answers
462 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 ...
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1answer
297 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 ...
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2answers
633 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 ...
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1answer
183 views

How bad is this damaged lug

I have noticed a little crack in one of the lugs of my gazelle steel frame. I hav not ridden it since, because I am worried it will break. Here are some pictures. The lug in question is the one ...
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2answers
393 views

Carbon seatpost dip in?

Can I insert a carbon seatpost up to 20cm deep into seat tube? The seattube is carbon as well. Total length of the seatpost is 35cm. The shape of the seatpost is aero seatpost (tear drop shape). It's ...
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2answers
899 views

FEM: How to Design weight-distribution in bike prototypes?

Inferio! No-one can understand this bloated question here, now more focussed. Suppose you are doing a new bike. How can you be certain that some critical point won't get too much force and the right ...
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3answers
360 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 ...
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1answer
43 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?
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3answers
217 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? ...
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1answer
92 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 ...
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1answer
393 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 ...
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1answer
970 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 ...
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2answers
397 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 ...
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1answer
995 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
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1answer
130 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 ...
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1answer
217 views

How can I use a small Shimano BB on any frame?

I have a Shimano BB-ES25 bottom bracket and 45T crankset that was removed from a Giant-CRX City with an eccentric hub (it had Shimano Alfine internal hub gears). They have literally never been used, ...
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1answer
2k views

What difference does bike size make?

I am 6.2 feet tall, and I have a mountain bike that is 17 inches long. I know it looks bit small for me, but will I hurt myself by riding this bicycle? What should be the preferred bicycle length for ...
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1answer
339 views

Purpose of partially filled in rear drop out

I have an old MTB frame that has the drive side rear dropout partially filled in as if it was part of the original forging of the dropout. And, I have seen this on a few other frames -- even ...
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1answer
406 views

Will a track wheel work with the dropouts on my frame?

I've got an old 7 speed steel frame. I've ordered a track wheel with a spacing of 120mm. My frame has correct drop outs for it, but does it have the correct spacing? If not, what are my options? ...
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3answers
517 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 ...
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1answer
112 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 ...
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1answer
333 views

Fitting questions - Effective top tube vs horizontal

I'm stuck in understanding size tables of a bike. For example this size chart: Am I right in my thoughts? Effective top tube (ETT) is horizontal value so, it's B1 on the chart. BS is the length of ...
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1answer
240 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, ...
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1answer
252 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 ...
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1answer
401 views

34.9mm front derailleur on steel frame?

Can I fit a 34.9mm front Shimano derailleur on my steel frame? I understand that steel frames are narrower. However, is there some sort of adapter that I can use, or can I even wrap the frame around ...
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0answers
141 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 ...
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0answers
138 views

Lowrider style bent forks techniques

Would a 24 inch bent fork fit on a 20 inch frame? Is there even a 24 inch fork? Would a 26 inch fit? Also if it doesn't fit in could I just add to the 20 inch - would you be able to extend it making ...
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2answers
808 views

Where can I go to change the vertical drop out for a horizontal drop out?

I have an aluminum road bike frame that I want to use to build a fixed gear. My problem with this frame is that it has vertical drop out and no derailleur hanger. Fr