Questions tagged [frames]

Bicycle frame construction, selection, maintenance, and repair.

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6
votes
2answers
886 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
71 views

Carbon Bike Frame Chip At Rear Wheel [duplicate]

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

Need help identifying this Vintage road bike :)

I recently bought this old road bike to fix up, but I havent been able to identify it, as the brand stickers are partly scratched out. Hopefully someone out there may know. Please view the photos, ...
4
votes
2answers
107 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
616 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
468 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
88 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
107 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
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0answers
61 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
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1answer
79 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
135 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
52 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
277 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
295 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 ...
34
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
97 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
89 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 ...
12
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
63 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
663 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
132 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
830 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
84 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
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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
65 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
155 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
43 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
128 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
232 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
59 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
297 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
78 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
71 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
62 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 ...
3
votes
2answers
119 views

Should I buy a little bit bigger bike?

I want to buy a mountain bike for the summer to ride with my friends, go on shorter rides (max 6 hours) and use in town. I am approximately 175 cm tall and 16 years old (so I might grow a bit). My ...
0
votes
0answers
30 views

I can not identify my bike and these serial numbers can you help.? [duplicate]

I can not identify my bike and these serial numbers are not pulling up anything SNACY 12H11569 can anyone help me find the name of this bike frame ?
2
votes
2answers
140 views

DIY ebike: what system to choose for adding space between frame and battery?

So, the project is to install this 5kg battery: on this bike: This is no joke. I'm serious. Following up to this previous question, I'm going to use steel rivnuts (aluminium is really too light for ...
2
votes
1answer
413 views

Blind rivet nuts for ebike battery on frame: aluminium or steel?

I'm planning my first installation of an ebike battery by drilling/riveting the frame (photo of the battery below), here are some details about the project: The battery weights about 5 kg. It's a ...
0
votes
0answers
57 views

Carbon Specialized Sirrus X5.0 Help

I am very new to this thread and seeking help from an experienced bike enthusiast. I just purchased the aforementioned bike in the title and after bringing it home for inspection(bought brand new from ...
3
votes
2answers
291 views

Trying to figure out what brand this frame actually is

Trying to figure out what the original brand of frame this is. The original owner said it was repainted and it doesnt seem to be an s-works frame
1
vote
1answer
152 views

Is this old steel frame MTB too big based on standover clearance?

Background: I'm a road bike rider but I bought a cheap but well kept old chro-moly steel frame 26er mountain bike (80s or early 90s model Miyata). I am planning on converting this to an ebike with a ...
4
votes
4answers
2k views

Drilling hole in aluminium frame

I want to attach a pump holder to my aluminium frame. Can I drill holes in it ? I would then use blind rivets with some glue for waterproofing to attach the holder. Is there a place on the frame where ...
5
votes
4answers
2k views

Why are bicycles so expensive?

I am looking to buy a bicycle to go from university to home everyday( about 20 KM per day), but I saw the price of bicycles are around $5000-$10000! I know I can buy many great motorcycles within this ...
0
votes
1answer
67 views

Confused about frame size [duplicate]

I am trying to determine the right frame size for myself before purchasing a hybrid bike. My height is 174 cm and I have an inseam size of 85 cm. If I go by the height it should be a medium frame ...
2
votes
1answer
82 views

How can I measure what is a relaxed geometry frame?

I would like to know If a frame would suit me for really long distance riding (100-200km). I have read about the stack to reach ratio, which for example for one of my bikes that is comfortable for me ...
1
vote
1answer
101 views

Unknown brazed steel frame

Hi all new here after a lot of searching, i was hoping maybe someone would be able to help me. Ive been trying to find out what frame i have. I bought a old steel frame from a car boot sale about 10 ...
2
votes
3answers
444 views

What are the times and costs involved in assembling a rideable bicycle from a salvaged frame?

Let's assume I bought a frame for XXX eur/usd/gbp. It usually is a steel frame from late '80s/90s, or an aluminium frame from the early '00s. The frame is of decent quality, it does not present ...
6
votes
2answers
2k views

Is my carbon frame done?

I have a carbon trek Emonda bicycle. Today, my rear derailleur got caught in my wheel. As a result, the rear derailleur is bent, the rear derailleur hanger snapped off, the chain got twisted and the ...

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