Questions tagged [frames]

Bicycle frame construction, selection, maintenance, and repair.

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7
votes
1answer
726 views

Chain damaged carbon frame. How to remedy?

During a recent fall, my chain came off my front chainring, and scratched up my frame. It looks to me like it's just the paint that's damaged but would appreciate a second opinion. The bike is a Trek ...
0
votes
1answer
122 views

Can anyone Identify this bike frame?

I was given this Aluminium frame probably form a 1990s tourer or hybrid. It has been resprayed in a similar colour to original paint job. Please see photos which show two frame mounts, one presumably ...
-2
votes
3answers
148 views

Is it sometimes best to abandon the make/model you really like and go to a different make/model because you're right in-between sizes?

When shopping for a bike, do you commit to a make/model from the outset, select a size, then fine tune the bike to fit you, or choose a make/model that makes it possible to pick a size that fits you ...
1
vote
1answer
662 views

Making bigger steel frame smaller

i bought old Peugeot carbolite 103. With size 60cm which is very big for me, so I have an idea to cut it to 50cm. Do you think it's worth it and the risks? Edit: Guys thanks for the fastest ...
4
votes
1answer
573 views

Dent below seat stay on a steel frame safe to ride?

This is a Surly Krampus frame; I just noticed this small dent while cleaning. It was purchased brand new, I've had it for about 2 weeks. Should I be worried?
-1
votes
1answer
101 views

this is my bike i have bought and i want to know what it is? Or how old? I would appreciate it s/n AS01104299? [closed]

MY NEW BIKE NEED TO KNOW WHAT IT IS? help me know please
6
votes
2answers
339 views

Will a rack fit on these rear-facing eyelets?

I have a gravel bike, a Nukeproof Digger, and I'd like to fit a lightweight pannier rack to it. It comes with 2 rear facing eyelets on the seatstays. Pannier racks seem to mount using eyelets on the ...
7
votes
4answers
1k views

Do I need to apply something on thru axle?

I've just bought my first carbon frame roadbike and realised that it has thru axle (previously I had quick release). Before I would do anything stupid, could someone give me advice if I should apply ...
7
votes
5answers
2k views

Should I replace this frame with a badly scraped chainstay?

I crashed yesterday and damaged this aluminum frame. At first I thought I shouldn't worry, but giving it a second thought, I think I should just replace before it breaks while riding. I would say it's ...
0
votes
5answers
249 views

Aluminum or steel for my first mountain bike?

For the past few months I've been planning to buy my first mountain bike. I'm struggling with buying an aluminum bike or a steel one. I recently read that aluminum bikes are as heavy as steel bikes: ...
14
votes
3answers
6k views

Why are all road bike frames now squashed parallelograms?

I am currently shopping for a road bike and have questions about current frame designs. My height is 6'3" and decade(s) ago I always liked frame designs for which the top of the seatstays joined ...
0
votes
1answer
144 views

What year, make , and model is this bike frame

The link, best as I can extract it: https://photos.google.com/share/AF1QipPqwbpMKmSm-noaaUrWOg9vwT-NsmKlunFvknVfCcUNY7eJGKzgFoK3ShSC06o2dw?pli=1&key=dTNWYlFiVHJUenFNVHpZVEJQbkxRaG40ZGJsZFhB
5
votes
3answers
1k views

Very tiny dent on new aluminium frame -- anything to be worried about?

I bought a new aluminium folding bike frame last week, and this weekend while I was cleaning the bike, I noticed this very tiny dent on the top tube of my frame. It was barely noticeable and I didn't ...
6
votes
2answers
989 views

Rear wheel centered at seatstays but offset at chanstays

Built up a new bike. All components are new and unused. As title suggests, rear wheel sits right in the middle of two seatstays (checked with ruler and vernier caliper) but is off by ~3mm at ...
0
votes
1answer
82 views

Carbon Bike Frame Chip At Rear Wheel [duplicate]

I was wondering if this is fixable?
9
votes
3answers
2k views

Vintage road bike with scratched-up bird logo

I recently bought this old road bike to fix up, but I haven't been able to identify it, as the brand stickers are partly scratched out.
4
votes
2answers
164 views

Help identifying a vintage Colnago frame

Can anyone provide a second (or third etc.) opinion on the type of Colnago frame? It looks to be identical to an early 80’s Super but has oval chain stay tubes, a braze on front derailleur mount and ...
6
votes
1answer
621 views

What does the frame material name of "SC7 Scandium" mean?

I just realised that my frame material is SC7 scandium. What does that term mean? Is it aluminium alloyed with other elements?
4
votes
3answers
531 views

Frame size: a little too small vs a little too big [duplicate]

The bicycle I want to buy comes in three frame sizes. Each of them has the recommended interval for the rider's height. These intervals do not overlap, and with my height I am right at the boundary ...
0
votes
0answers
95 views

My brother gave me a bike for my son, its a Diamondback. Serial # is F5C94618, C is backwards. Can anyone help me with some more info on this

My brother gave me a Diamondback for my son, I'm guessing it's an 85' but not sure. S# is F5C94618 (the C is backwards). Thanks for the help.
0
votes
1answer
108 views

How can I shorten the frame of a "Duchie shopper" bike?

The cycle is a "Duchie shopper". The bike is to big for my wife. Is it possible to shorten it for her? She is 5 ft (152 cm) tall. The bike has a 27 inch wheels. I want to shorten it by ...
0
votes
0answers
65 views

carbon frame bike ktm revelator 4000 2017 damaged

KTM 2017 revelator 4000 in the bottom of the frame I have noticed this failure/puncture. Would you trust the damage here in the picture?
0
votes
1answer
85 views

Lugged steel frame ID

Can't find any sort of serial number stamped anywhere. I am going to strip it down and rebuild it. the downtube shifter cable clamps have 333 on them. Link to the imgur gallery
2
votes
2answers
155 views

Vertical mark on chainstay?

I bought a used 1990's steel bike the other day and have disassembled it for repainting. However I came across a small patch of missing paint on the drive-side chainstay, which had apparently been ...
1
vote
0answers
53 views

Building a MTB choosing a frame [closed]

I am thinking about building a mountain bike, a trail hardtail with mabye 130 to 140mm fork up front. Any suggestions on what to look for in getting the right frame?
5
votes
1answer
283 views

Buidling my own bike - what are these VERY small rings for in the fork?

I am trying to build my own bike. I ordered a frame that came with a fork and the stem locks. Now I am finished and i unfortunately see two of these VERY small rings.. they came with the fork+frame ...
1
vote
2answers
301 views

Do recumbent bicycles cause knee pain?

I've been thinking about the way the body is positioned on a recumbent bicycle and it seems like knee pain might result. Even if you use a low gearing I think the force direction will always be in a ...
35
votes
5answers
7k views

How to choose a bike for a very tall and heavy person?

So I have wanted to ride a bike for a long time, I do strongman training, I am 6'6 (200cm) tall and kinda fluctuate between 440 - 480 pounds (200-220 kg) depending on what training I am on. We are ...
1
vote
1answer
190 views

Help with identifying this "Cinelli" bike frame

Found this being sold for cheap locally, and I was wondering what type of frame this is, or if it is even a legit cinelli frame: Tried googling it, but I can't find any leads. Thanks for the help! ...
3
votes
1answer
91 views

Correct saddle height v correct frame size

This is something that has always intrigued me. I expect there are numerous answers to this here. Apologies in advance! I'm 178cm tall with a 73cm inside leg. I've cycled for more years than I'd like ...
13
votes
7answers
6k views

Is it worth buying a high end light bike (8.5 kg) from 80' vs recent mid range bike (10kg)

I want to acquire my first road bike with a limited budget (~400€) but I'm faced with a lot of choices, found an old vitus 979 equiped with campagnolo chorus, a little rusty but really pretty and ...
-1
votes
1answer
67 views

Warranty nukeproof mega elite 290 carbon M

Does anyone have any info on what the warranty would be for all parts on my carbon nukeproof mega have (bought from chain reaction cycles)? Thanks!
4
votes
2answers
693 views

Slightly bent seat stays. Should I worry about it?

I just realized my seat stays are slightly bent The frame is steel. Is this something I should be worried about? PS: notice how also the top of the seat stay is naturally bent. Perhaps a normal design ...
11
votes
4answers
2k views

I have a question regarding the structural integrity of my aluminum frame after its having... incurred damage;

Apologies if this has been covered previously, but I didn't see it if it had been, and at this point I'm at a loss. For context, the bike in question is this year's Haro Double Peak Sport 29 https://...
1
vote
1answer
141 views

How unsafe is it to ride a bike with this dent in aluminium top tube?

This didn't happen as part of a crash. In fact, I'm not sure what might be the reason. I just looked down and saw this while riding on a sunny day. My bike is always in my room and I live alone. I sit ...
5
votes
1answer
867 views

Dent near bottom bracket on vintage steel frame

I just bought myself an old vintage Koga Miyata and just realized today that there's a weird dent on the frame near bottom bracket. Is this something I should be worried about? Or is it normal with ...
0
votes
0answers
89 views

Can I use mtb rigid fork in touring frame?

I am looking to change my fork because of some issue(broken). My problem is my headtube is the standard ec34, which is why I can't use tapered fork. So, I am looking at some mtb rigid fork, which have ...
7
votes
2answers
1k views

Scratch or Crack?

I'm curious on opinions if this is a crack or a scratch. No crashes. No drops. Yes creaking.
4
votes
4answers
1k views

How to recognize a cheap from a quality steel frame

I decided to build my own bike. Went to a bike shop, took the first broken bike they had for 40 euro that I kind of liked and fixed it up to a nice (what I think) build (thanks RJ bike guy videos) (...
0
votes
1answer
68 views

What BMX frame did I find? [closed]

it has HH so I'm assuming Haro the number on the bike is as follows F2W7GO586 if you can tell me what I have and what its possibly worth
2
votes
2answers
161 views

Are worse QC'ed carbon frames chosen for pairing with lower tier components? Does it matter?

I am wondering if in carbon (or any other material, for that matter) manufacturers explicitly choose the better crafted frames to pair with higher tier components. By better crafted I mean of all ...
1
vote
3answers
45 views

What hub for cassette to mount in frame with ear fork width 12cm (currently it's single speed)

I have a single speed bike with rear fork width 12cm. Is it possible to mount there a hub with multi gear freewheel? I measured my other bike's rear fork width and it's wider - 13cm. So I expect that ...
2
votes
3answers
145 views

Carbon fiber aesthetics vs. poor craftsmanship vs. possible repair? [duplicate]

Today a N.O.S. 2016 Stumpjumper FSR carbon frame set arrived, and I'm not impressed with some aspects of the way the carbon fiber front triangle appears. My CF experience is limited having only owned ...
2
votes
5answers
274 views

Would It be fatally dangerous to ride with this dent [Pictures]?

Hello fellow cyclists, I have had a crash recently and there's a minor dent at the top tube. The manufacturer (Canyon) is telling me it'll take them 8 weeks to make an appointment for me to replace ...
0
votes
1answer
61 views

Best way to clean powder coat overspray

I have a BMX frame that has overspray from a powder coating job on one of the v-brake posts, impeding the rotation of the arm back to the original position. Assuming the idea would be to gently sand ...
6
votes
2answers
301 views

Questions about Boost frames and cranksets

I made the plunge and have purchased a new 2016 Stumpjumper FSR carbon frame. The post on eBay--from the Specialized Outlet Store, no less--was incorrect when it stated the frame had 142mm rear ...
0
votes
2answers
81 views

What model are these forks?

Recently, I picked up this set of threaded forks. I saw the chrome and it looked clean enough so took a better look and saw the make ‘campagnolo’ written on the stem. In the end I got them for the ...
-1
votes
2answers
72 views

Some bluesheets for bike frame size? [closed]

I need some basic bluesheet that illustrates/show the different size/angles of a bike frame, but googling I can't find nothing else than consumer standpoints like for whom an xl bike is aimed for and ...
2
votes
1answer
80 views

Rattle inside frame: cause for concern?

Recently, something started rattling inside of my less than a year old hardtail mountain bike frame. I was unable to figure out what, and could not fix it. Is this cause for concern? The frame is ...

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