Questions tagged [frames]
Bicycle frame construction, selection, maintenance, and repair.
923
questions
2
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Wear marks on seat stay from fender/mudguard. Problem?
Mudguards have worn away where they contact the seat stay on carbon frame. A little deep, wondering if cosmetic or more serious. The one on the right stay doesn't look as deep but you can see 3 ...
- 21
14
votes
2
answers
2k
views
I need help identifying this "Mystery Bike" (could possibly be a real ferrari?)
Good day to everyone,
So i have this really old bike.
I don't know its brand and model. The paint is still stock, and it has a Ferrari sticker with the name "Michael Schumacher" and ...
- 163
1
vote
1
answer
81
views
Carbon frame damaged? [duplicate]
I had a crash a couple of weeks ago with my BH Quartz. The front wheel got caught in a crack in the road, I heard a crack and I fell on the side. I was worried that the frame cracked, but couldn't ...
- 11
2
votes
1
answer
523
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On WSD bicycle shouldn't the seat tube be longer and at a shallower angle?
I bought a WSD ("Women specify design") bicycle for my wife which was delivered in a box.
After putting it together I took it for a ride to test it and I realised two things.
The seat tube ...
- 121
1
vote
2
answers
149
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bike fork spacer(?)
hi im trying to pack my bike for an plane ride, and while packing I wanted to know what's the name of the spacer that comes between the fork to prevent compression without the wheel.
its the thing ...
- 67
2
votes
2
answers
208
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Are these scratches in my aluminum frame structural or purely cosmetic?
My aluminum bike (Cannondale Adventure 1) was scratched on the welds connecting the seat tube and seat stays, and I was wondering if the damage is purely cosmetic, or if there is any structural damage....
- 106
0
votes
1
answer
149
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Is this a serious paint defect?
I am about to receive a bike and the shop has informed me of the following (cosmetic, they claim) paint defect:
Since I don't have a lot of experience, is this something that might chip off? Or is ...
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-3
votes
1
answer
89
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Cassette Compatibility Issues [closed]
Because I sit at home playing games in doodle jump too much, I decided to buy a bicycle to exercise.
2
votes
2
answers
129
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Vintage 531 frame. Identify original make?
I rescued this bike from the tip a couple of years back and rebuilt it (in the UK). I am curious to know what the original make might be? The original frame had been badly repainted so no makers name ...
- 241
1
vote
1
answer
116
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Another carbon damage assessment?
Mostly cosmetic? Chip is located on the bottom of the top tube. Did it go through a layer of carbon, or is that just paint/resin? Dime sized. This is an enduro mtb frame, so assuming it's built ...
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1
vote
0
answers
82
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What model is this Dyno? Serial number makes it 1995 Nitro? VFR?
All stamped Dyno, white chainwheel, forks, stem, and bars. Cant find another like it, wondering if parts may have been swapped out at some point because I cant find this colorway anywhere, the ...
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1
vote
1
answer
48
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Challenge Seiran luggage rack image or blueprint
Years ago, I bought a Challenge Seiran. At the time, I didn't bother buying the luggage rack attachment. Not the one attached behind the seat but the one going under it.
For those who don't know, it ...
- 111
0
votes
2
answers
70
views
What size of inner tube fits a 650x47b tire?
What size of inner tube fits a 650x47b tire?
It's gravel bike. The tire states it's tubeless ready but there's a tube in it currently.
-4
votes
1
answer
88
views
Is it possible to prove that applied forces to a top tube are worse than a seatpost when using a repair stand clamp?
This stems from the idea that you should use a bike stand clamp on a seatpost, if you can, for carbon fiber (CF) bike frames. Hopefully, this would avoid the cracking of a CF bike frame.
In order to ...
1
vote
0
answers
39
views
Need help identifying this logo on 2016 bmx
I was looking for a bit of help identifying this insignia on this 2016 bmx I'm restoring. Any help would be fantastic
4
votes
1
answer
117
views
Which geometry specifications determine the seating position of an MTB?
MTB manufacturers release geometry data for their bikes. If I want to know if a bike has a more upright or stretched position, which geometry data do I have to compare?
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4
votes
1
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199
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Aluminium frame alterations
I know it is possible to make almost any type of frame alteration to a steel frame. But what about aluminium?
I would like to know if anyone has a first-hand experience in adding braze-ons, and doing ...
- 2,254
0
votes
1
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161
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Tiny dent near the bottom bracket of a new hardtail - should I be concerned?
I’ve just purchased a new Trek Roscoe 7 (aluminum hardtail mountain bike) recently and I’ve noticed this tiny little dent today. It is on the drive-side chainstay near the bottom bracket.
Should I ...
0
votes
1
answer
51
views
What do these specs mean? I have a Cannondale Road Bike 700x23c
I've been trying to find the model of my bike but I can't even find the year.
700x23c
175
EPE 45% PU 55%
T 430
700
23-622
- 1
0
votes
0
answers
34
views
Help me decode Haro Vector serial number please
Recently acquired a Haro Vector mountain bike. Serial number V2K506004 anyone please help me decode this?
6
votes
2
answers
1k
views
Small dents on bicycle frame
Two weeks ago I bought Trek Checkpoint ALR5. Bike rides pretty well. It has aluminium frame. I bought it primarily for bike packing trips as it has ton of mounting points.
After riding it for 2 weeks ...
4
votes
1
answer
75
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Stainless steel ladies bike frame failure?
i am new to this group and this is my first post. My Japanese Miyata ladies bike had this problem for so long time. The down tube had come out for about 3mm from its connecter. It looks like there ...
1
vote
1
answer
75
views
How to adapt a tube-mounted clamped accessory for a larger diameter tube?
I bought an Abus bike lock which came with a tube mount called the Abus EaZy KF.
The issue is that this mount only supports up to 36 mm diameter tube but the smallest tube on my bicycle is 38 mm. I ...
- 153
3
votes
2
answers
159
views
Carbon Damage on bridge, repair possible? If so, what steps are needed?
This is a follow up question to:
Attachmentpoint rim brakes carbon bike, sratches/crack?
So. My bridge on my x lite 4 seems to be delaminating. Unfortunately Rose does not want to honor their six year ...
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17
votes
5
answers
2k
views
Which frame material is the most sustainable?
I would like to buy a new road bike. However, I also want to make sure which material is the most sustainable. On the one hand in production and on the other hand in disposal.
I had already asked a ...
- 511
3
votes
1
answer
177
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Is the carbon frame disposal problematic
I heard from someone that carbon is difficult to dispose of. Does anyone know how
to dispose of carbon frames?
- 511
-2
votes
1
answer
189
views
I don't understand why these bikes have the specific frame sizes
Why does huffy's Rock Creek mountain bike have the same size frame for the 26-in and the 24-in but the 29-in version has a huge frame like a 26-in mountain bike should not have the same size frame as ...
- 1
5
votes
1
answer
843
views
Identify unusual thin bicycle frame
What is the generic name and/or specific products associated with the illustrated frame? Is it lighter than a normal frame?
- 153
0
votes
2
answers
107
views
What color can I spray on top my green bike?
I want to do this without having to remove/strip having to strip paint from the frame which is already flaking off slowly.
- 121
2
votes
2
answers
621
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Is there an issue with this seatstay? photo
is this seat stay normal or is there a dent / damage here?
Hard to tell it's near the welding but the other side does not have this.
From https://imgur.com/a/xUtmeKN
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3
votes
4
answers
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Were titanium road bikes ridden in the Tour de France?
I know that steel and aluminium frames were ridden in the Tour.
I wonder if there was a time when titanium frames were ridden in the Tour de France.
was ridden. I haven't found anything about this on ...
- 511
0
votes
1
answer
102
views
What's bike do I have
I can't find what kind of bike I have and I can't find the logo anywhere on the internet I've googled image and it's not on there please help me and tell me what I have thank you
8
votes
2
answers
3k
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Do carbon MTB frames crack easily?
I have been looking to buy a new full sus mtb (Vitus sommet 29 Cr) and saw that the main frame is carbon fibre with the rear triangle being aluminium. I love the bikes specs and aesthetics but can't ...
- 89
0
votes
0
answers
79
views
Help identifying frame brand/model
My friend gave me this frame and the old paint job was covered with spray paint so I decided to paint, strip and run it raw.
I need help with identifying the frame. The pictures provided show the ...
4
votes
1
answer
127
views
Butted tubing - lighter but is it more fragile (child seat)
Looking to build a daily on a steel frame, tempted to go for a higher end (Marin, Kona, some Raleigh) but I am wondering if the double or triple butted tubes are more fragile ?
For example if you put ...
- 493
14
votes
3
answers
2k
views
Why do most full suspension MTBs have a kink in the down tube?
Back in the time... bikes did not have (rear) suspension and the most common frame design was the "diamond frame", with straight pipes. Today, mostly in full suspension bikes, there is ...
- 371
2
votes
0
answers
103
views
Identifying this road bike brand
Can someone help me identify this frame? It was given to me in Switzerland. My uncle and cousin bought it already painted grey. I noticed an engraved logo in the dropout, but it does not look like it ...
10
votes
1
answer
1k
views
Why aren't derailleur hangers made into standard shapes?
That small piece of metal can render a bike unrideable, and sometimes a repacement is impossible to find.
There are standards for headsets, bottom brackets, brake mounting points, OLD and dropouts, ...
- 2,051
5
votes
4
answers
928
views
BB drop vs BB height from stability perspective
While I have heard that a lower bottom bracket tends to give more stability, I'm confused as from which point of reference yields such an effect, from the wheel axle (BB drop) or from the tire contact ...
- 1,295
13
votes
2
answers
3k
views
Rear wheels are dished. Why not "dish" the frame instead?
Most rear wheels are dished to make room for the cassette. They have the drive side spokes comming into the hub more perpendicularly, which weakens the wheel against lateral forces in that direction. ...
- 2,051
6
votes
1
answer
212
views
What is the advantage on road bikes where the seat stay merges into the upper part of the seat tube, but well below the top tube
For a few years now, you see more and more road bike manufacturers building this new frame shape. What is the advantage of this geometry?
- 511
9
votes
4
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2k
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Is there a reason why it was said that the distance between the seat tube and the rear wheel should be as small as possible on a road bike?
I recently saw a steel road bike in a road bike shop where the distance was well over 1cm. 99.9% of old road bikes had a very small distance (~5mm). At the time, they thought it was more aerodynamic. ...
- 511
1
vote
1
answer
120
views
Is this defect on 2022 Trek FX 2 frame?
I got new 2022 Trek FX 2 couple of days ago. But I noticed something on the end of the left chain stay. Are these defect and should I worry about it? Also I asked this to the local retail where I ...
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2
votes
2
answers
140
views
Help identifying bike make and model
Can anyone help me please in identifying my racing bike frame make and model?
I can’t find any serial numbers or markings on the frame and I am not even sure whether it is in fact a Gios Torino frame ...
- 21
2
votes
1
answer
87
views
Bent Reynolds 531 Simplex stays at dropouts
I have just bought a Reynolds 531 Simplex bike frame and noticed the left chainstay and right seatstay look slightly bent at the dropouts. The right dropout appears to be incompletely inserted into ...
- 21
0
votes
0
answers
27
views
Getting information from a 15 Giant Avail Adv 1 Serial Number
My bike was totaled. I have the serial number from the original receipt. Can I find out the frame size of the bike with the serial number?
13
votes
5
answers
3k
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Can I trust my bike’s frame after I was hit by a car if there's no visible cracking?
I was waiting at a red light and the person behind me hit me. Her car ran over my rear wheel crushing it and over my frame. I have checked the frame were there are indications of her car but do not ...
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6
answers
2k
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Is it possible to repair a dent on an aluminum frame using carbon fiber?
Every dent is unique so I think it is ok to ask this question once more.
I have a Stevens Superflight 2020 which has a dent on a frame:
My plan is to create some carbon fiber sleeve around the dent, ...
- 121
2
votes
3
answers
165
views
Do inner-routed cables have segments without a housing?
Bowden cables (whether for shifting or for brakes) running outside a
frame save a little weight and expense by using the frame for
compression in lieu of the housing in long stretches along the
frame—...
- 8,974
7
votes
2
answers
752
views
Can I mount a rack on eyelets that aren't horizontal?
The eyelets at the lower end of my frame's seatstays are not aligned with the dropouts (to allow attachment of a vertical rack strut). The misalignment is around 13°.
Two questions:
What options do I ...
- 3,981