Questions tagged [frames]

Bicycle frame construction, selection, maintenance, and repair.

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Should I be worried about potential chip in carbon near dropouts?

I just bought this bike second hand and I noticed this after. The chip is about 1/8 of an inch wide and about 1/32 deep. Is this a cause for concern?
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2 votes
2 answers
69 views

Help Identifying Bike Frame?

Trying to identify this bike frame so I can build it with compatible components, AND so I can calculate it's value. Any help massively appreciated.
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5 votes
1 answer
76 views

Long term durability of surface coatings for frames and parts

I'm trying to determine the best coating or combination of coatings for bicycles that I'm refurbishing. Along with other elements of making these bikes weatherproof (full chaincases, fenders, water ...
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2 votes
2 answers
311 views

What is the model of this bike?

I am looking for the model of this bike. I'm considering buying it, but the owner doesn't know what brand/model it is. The bottom tube seems to have lost the brand name, but on the front of the frame, ...
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3 votes
0 answers
90 views

I need help identifying this womens bike frame, please

It's nearly 70 years old. I've narrowed the potentials down to Sears, Schwinn or possibly J.C. Higgins. I did just order the wheels for this and it takes 26" schwinn apparently as opposed to ...
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1 vote
0 answers
33 views

please help identify this bmx brand logo!

having trouble identifying this logo found on my Bmx frame- any ideas? Many thanks
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0 votes
0 answers
55 views

Please help me find the make and model

Hello, so I believe I have narrowed the make down to either a Marin frame, or an Orange frame but I've been wrong before, so any information anyone can give me on either how to find out the make and ...
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1 vote
2 answers
79 views

BLB Viper - Is this frame OK?

I want to start building a fixed speed bike and think about having the BLB Viper frame set. Is it a good frame to start with or would you recommend to get a different ONE, like a Leader frame or a ...
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  • 113
9 votes
5 answers
2k views

Is it safe to ride a frame with a hairline crack in the head tube lug?

I am considering buying an Alan Super Record aluminium frame, but there is a hairline crack in the lug on the bottom of the headtube. Is this a big problem, and would it be unsafe to ride it? Is there ...
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3 votes
2 answers
268 views

What type of bikes have a steel frame with 135mm rear dropouts spacing?

I'm looking for a bike frame made of steel with a 135mm rear dropouts spacing. The reason is that I might have to cold set at ~ 138mm for a project. It could be a road bike, a mountain bike, or a ...
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  • 353
1 vote
1 answer
72 views

Can someone help me find what my frame model is?

A little backstory: so I bought the bike before 2 mounts and on the frame it says that its Orange 224 evolution but I browsed true the internet and it doesn't seem to be it the frames don't mach so I ...
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0 votes
0 answers
44 views

What model/year is this frame?

I recently got this frame second hand after mine was damaged in an attempted theft. Having a couple of issues refitting, I wonder if anyone can identify the model/year?
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-2 votes
1 answer
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I have a BMX frame and I'm trying to identify by the VIN number [duplicate]

The VIN number is h b l y j e e 0 0 5 9 and then it goes b l – 2552 and then another part of it in dark dark 020 trying to find out what frame this is
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0 votes
1 answer
136 views

Cracked carbon frame near seat post

A thick crack has appeared on the rear side of my carbon frame near the seat post. The crack formed after adjusting the seat post to the maximum recommended height. How might this have happened? Is ...
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2 votes
2 answers
110 views

Is it feasible to jerryrig a motorbike saddlebag as a bike pannier?

There’s a used rear bike rack and a used motorbike saddle bag people are selling in my area. I already set up a time and date to pick both up before I realized that this bag was for motorbikes, but I ...
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2 votes
2 answers
1k views

What are these parts of the frame called?

Intro I am drafting a question about a frame problem, but I'm struggling with terminology. It seems "appropriate for stack-exchange" to start by asking about the terminology first. Main ...
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  • 1,993
4 votes
2 answers
656 views

How to restore broken rear disc brake mount in carbon frame?

Look at the image: Bike model is Rocky Mountain Vertex 990. The frame is broken in a way that it's impossible to install rear disc brake. Possibly there may be a frame deformation. Is it even ...
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0 votes
2 answers
150 views

Is a shared bolt between the rear shock mounting and rear swing arm ok?

I'm buying this for my brother mainly for deep-snow riding. The rider weighs about 120 kg (265 lbs). 26" x 4" (102mm) tires in the pictures, but I will install 26" x 4.8" (122mm) ...
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0 votes
1 answer
59 views

Can I put a I fox 40 on 2018 Commencal Supreme SX?

I recently bought a Commencal supreme SX, which came with a double crown fork. The bike was a really good deal and I had never had a dh bike. This was one of my only selections, so let me know if I ...
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  • 1
4 votes
5 answers
814 views

How to choose frame size as a non-flexible person?

I've been commuting regularly to work during the last four years and I would like to get a road bike to replace my old city bike and enjoy some cycling on the weekends. I've been looking which bike ...
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  • 145
1 vote
2 answers
243 views

Most durable bicycle frame: Titanium?

My Kuota carbon frame of 10 years is trashed. It was ridden for 100 000km in the most abhorrent weather conditions and never cleaned. It makes cracking sounds when under torsional loads, the steering ...
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  • 1,146
7 votes
3 answers
648 views

How would one determine if enlarging the loadbearing screw holes for the bike rack is a good idea?

I've had multiple times the issue of the loadbearing screw for the bike rack breaking in half, and it's always a hell to get out. There seem to be two schools of thought: Drill a bigger hole and put ...
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  • 173
-1 votes
3 answers
205 views

Is this frame/bike suitable for a heavy rider?

Here is one frame I am looking at, just for normal gravel road riding but I´m quite heavy rider currently around 331 lbs (150 kg). Need help looking for issues with this frame.
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1 vote
2 answers
231 views

Can I convert my Trek Marlin 7 frame to thru axle?

I just got my trek marlin 7 bike and was wondering if I can convert it to TA( through axle).
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10 votes
2 answers
1k views

Why are aluminum frames fitted with steel rivnuts?

I have a couple of old aluminum frames and the bottle cage mounts always show signs of galvanic corrosion due to the steel rivnuts. Why do manufacturers not use aluminum rivnuts?
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  • 1,111
0 votes
2 answers
491 views

I have a Gt dyno serial number WYC8I00217 who can help me get the year and model [closed]

It's 100% steel serial number is WYC8I00217k
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1 vote
1 answer
118 views

Does a smaller than recommended frame size cause problems?

What problems, if any, should I expect from an undersized frame, and how small would the frame have to be before these issues occur? For the sake of the question please assume an older steel diamond-...
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1 vote
0 answers
59 views

Steel frame sets compatible with disc brakes [closed]

I have acquired a shimano deore groupset from a Kona Dew FS. The alu frame snapped due to poor storage whilst in transit. I’d like to fit the components to a new frame set but am interested to hear if ...
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3 votes
2 answers
166 views

Is it possible to remove decals from the Orbea Gain frame?

I’m looking into buying the Orbea Gain electric bike. But I really dislike the big Orbea logo on the frame. Do you think it’s possible to remove this without ruining the paint somehow? The decal is ...
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  • 145
7 votes
1 answer
1k 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 ...
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0 votes
1 answer
129 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 ...
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  • 19
-2 votes
3 answers
153 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 ...
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  • 4,911
1 vote
1 answer
685 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 ...
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  • 19
4 votes
1 answer
638 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?
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-2 votes
1 answer
56 views

Hi, what year were this two bikes made? serial number on seat clamp on frame is H180003 second one is M068662. thank you! [closed]

i need year they were made please!
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  • 1
-1 votes
1 answer
103 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
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7 votes
2 answers
446 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 ...
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  • 172
8 votes
4 answers
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 ...
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  • 403
7 votes
5 answers
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 ...
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0 votes
5 answers
313 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: ...
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14 votes
3 answers
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 ...
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0 votes
1 answer
160 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
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5 votes
3 answers
2k 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 ...
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  • 139
6 votes
2 answers
1k 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 ...
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  • 1,013
0 votes
1 answer
115 views

Carbon Bike Frame Chip At Rear Wheel [duplicate]

I was wondering if this is fixable?
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9 votes
3 answers
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.
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  • 217
4 votes
2 answers
382 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 ...
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6 votes
1 answer
632 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?
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  • 167
4 votes
3 answers
906 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 ...
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  • 3,776
0 votes
0 answers
96 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.
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