Bicycle frame construction, selection, maintenance, and repair.

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101 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
378 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
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1answer
516 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......
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1answer
69 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 ...
4
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3answers
3k 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 ...
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2answers
140 views

What accommodations might be made for riding a frame 4'' too large?

I have been offered possession of a very old and interesting bicycle, made in 1933. It appears to be in quite good condition, and has a lot of interesting history. However, it features a 26'' frame, ...
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4answers
3k 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 ...
3
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1answer
299 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 ...
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2answers
245 views

unknown make model and year

enter image description here! Can someone please help me identify this frame? I have tried searching the net for same lugs design but I can not find anything that is similar to the lugs of this frame....
3
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1answer
375 views

What are these holes in my frame for?

I have two threaded holes on the inside of my frame on my 2007 Stumpjumper FSR and I don't know what they are for. Can anyone tell me why they're there?
3
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2answers
332 views

How to identify lead paint?

I'm starting renovation work on an old bicycle. One of the things I want to do is a new paint job. I guess before that I'll need to sand the current paint off the frame. So I bought sandpaper. On the ...
4
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1answer
270 views

How to find a frame given a geometry

In 2007, I bought my first bike: a Bianchi Boardwalk 2006. It was a great bike, but I didn't treat it well and it now needs about $300 worth of work. I've been thinking that maybe I'd like to take ...
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1answer
168 views

determining make model and year of a BMX frame

is there a specific website where I can simply enter the bicycle serial number to determine the make model and year primarily BMX frames
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2answers
553 views

Can I change my bike's frame?

A failed stealing attempt left my Bianchi Via Nirone 7 road bike with an ugly damage to the frame. The bike is still in place, and it hurts me every time I go to the bike shed. They removed the front ...
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0answers
185 views

Help identifying MTB frame

Apologies making ANOTHER one of these threads...Anyhows: Bought a bike third hand, frame has been stripped and painted. Trying to find make & model so I can get some offset bushings for the shock. ...
2
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1answer
400 views

Rear disc calliper won't fit, disc mount bent?

I am upgrading my MTB to disc brakes. I have disc compatible wheels and a set of Shimano M446 Postmount callipers and 160mm rotors. Front fork is a Manitou who decided to jump on the Postmount wagon ...
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2answers
401 views

Rear derailleur hitting chainstay (video in the post)

I filmed a little video of the process: https://youtu.be/ejJsIWrrFTU Does anyone know how to solve the problem? Apart from attaching piece of rubber to the chainstay? It is really annoying, because ...
3
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1answer
227 views

Vandalized top tube

My bike was vandalized and the top tube is completely bust, is it possible to get this repaired/replaced? any advice here would be great, thanks a lot.
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0answers
82 views

Bike Frame Brand and Model?

enter image description hereI purchased this bike at a thrift shop and it rides like a dream. Out of curiosity I'm trying to figure out the make and brand. The parts on it seem to be very nice so I'...
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4answers
9k views

what type of bike/frame to use when overweight?

I'm around 230lbs. Since I do enjoy biking, I was looking up old school racing bikes on craigslist. Some of the frames are built with "Tange 1" steel which specify weight limits (180lbs). Is it really ...
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3answers
236 views

First Road Bike - Some Options and Issues

I am looking the market for my first road bike. I am planing to be using the bike, couple times per week for 1 - 2 hour rides, and maybe on the weekend some longer ones, around UK Yorkshire. There ...
4
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1answer
2k views

What does a good weld look like

Reading various questions and answers around here, I've heard a lot of people say you can tell the quality of the bicycle by looking at the welds. How do I know what a good weld looks like as opposed ...
3
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3answers
865 views

Best kind of bicycle for lower back issues?

I've ridden bikes all my life. Now nearing 50, for the past year or two I've noticed that when I ride over 20km or so, my lower back gets extremely painful - enough to make it not possible to ride. ...
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1answer
710 views

Shimano Hollowtech II bottom bracket: milling the frame necessary?

In a bike shop I recently asked for bottom brackets. The seller said, when choosing a Hollowtech II bottom bracket (like SM-BB70), compared to Octalink/square taper bottom brackets the outer (lateral) ...
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1answer
197 views

Trying to figure out the Brand/Make of this bicycle?

Got this from a friend hand-me-down style. Got some work to do on it to make her roadworthy. But it's been painted, and I can't see a logo or name on it anywhere. Steel Metal Frame. That's about all ...
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3answers
407 views

Water inside bike frame

My latest "project" involves my bike, i.e. I want to perform a complete renovation of it. This involves changing rim, complete shift group, brakes, hubs, carrier etc, just keeping frame, seat post and ...
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10answers
14k views

How does a bike's weight affect the overall experience of owning it?

Naturally, carrying a light bike up the stairs is much more enjoyable compared to a heavier bike. Are there any other aspects of a bike which are affected by its weight? For example, would the weight ...
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1answer
173 views

Frame not faced for BB. Strip the paint or leave as-is? [duplicate]

So I just got my new frame from the LBS. They were supposed to face the frame, but only faced the head tube (hopefully, can't check it since the headset is already installed.). Sadly, they didn't ...
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2answers
5k views

What defines a “compact” road bike?

I've been reading a lot about road bikes and looking at the differences between bikes called "compacts" but I don't see much consistency. I've read that compact road bikes have different gearing and ...
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2answers
1k views

Do I need to chase a thread before installing a bottom bracket on a new frame?

Currently I'm building a new Surly Cross Check, and it needs a 68mm BB (english threaded). Furthermore, I plan to use a cheap $15 shimano BB with JIS square tapered interface, nothing special. Do I ...
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2answers
153 views

Remove paint from the head tube

I'm planning to build a new bike from scratch. Part of that is buying a new frame, and possibly facing/reaming it. That's actually the part I'm scared of the most. Fortunately, the brand I'm ...
12
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4answers
7k views

Should or can I (car) wax my frame?

Having spent the whole summer taking a bike apart, painting it and now in the process of building it again, I was thinking about waxing it. I want the finish to last as long as possible, after all, I'...
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1answer
235 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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3answers
3k views

long distance touring: is high tensile steel silly?

I am planning a touring trip, let's say around 10'000 km, across Asia more or less. I have no intention at all to buy one of those several thousands - worth touring bikes. Apparently, on a lot of ...
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1answer
6k views

Calculate frame stack and reach

Is is possible to calculate stack and reach for framesize 63?
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3answers
7k views

Why are steel bikes more expensive than aluminum?

It's hard to find a chrome moly bike for less than $1000 these days. Is it because it's actually less expensive to manufacture aluminum bikes these days or is the market for chrome moly bikes so ...
2
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1answer
2k 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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5answers
2k views

What can I do about a cracked frame?

I noticed the other day that my frame has a crack in it! I believe that it's my seat post causing the problem. A couple of questions really, a) how serious is this? and b) can it be repaired? Edit: ...
4
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2answers
2k 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 ...
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3answers
226 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
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2answers
5k 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 ...
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1answer
472 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?
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1answer
528 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, ...
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2answers
110k 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 ...
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5answers
2k 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 ...
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1answer
432 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 ...
3
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4answers
5k 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 ...
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0answers
158 views

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

Does anyone here know anything about this old Fondriest bike? Thanks!
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4answers
1k 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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1answer
534 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. ...