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Questions tagged [frames]

Bicycle frame construction, selection, maintenance, and repair.

-1
votes
1answer
73 views

Hi, I'm looking for some help in identifying this bike frame?

I'm looking for some information on this bike, it's a steel frame road bike with chrome dropouts the rear ones are SR suntour ones, theres no badges or decals on it it was like that when I bought it , ...
-2
votes
0answers
41 views

What model of haro with serial # X1S4HO2937 do i have

It's almost complete original haro bike parts
-1
votes
1answer
135 views

I'd like to know what kind of bmx bike I have

I got this frame in an old pile of junk ,can you please let me know what kind it it t/y
4
votes
3answers
121 views

How to assess safety of carbon frame after crash?

I was recently hit by a car which pulled onto a roundabout. The driver hadn't seen me. The car hit me hard enough to actually snap the rim of my rear wheel. The bike has a carbon fibre frame and ...
0
votes
0answers
40 views

What can this bike do? [duplicate]

I have this bike for quite some time. I want to know if this bike is good for for xc, trails or trials. And also I want to know if this bike frame geometry is good for doing manuals, bunny hops Here ...
1
vote
1answer
47 views

What kind of fork end is this?

I am looking for a new city/urban bike and thought that a gear hub would be a nice addition (before this I was exclusively using derailleur gears). To get started I was reading the wiki page on fork ...
3
votes
2answers
118 views

Identify this bike please

What kind of bike is this? Looks like it says Tornado. I love the handles - what kind are they?
3
votes
3answers
96 views

Rust hole on tube between chain stays

I've inherited a frame my father used to ride and was planning on getting it blasted and coated. Checking it over it all seems to be in fair condition (its decent 531 Reynold tube), some rust, but ...
-3
votes
1answer
102 views

What kind of bike do I have? Serial number is VF-8S3-20.5-9 [duplicate]

BMX frame has two holes on front tube for forks.
2
votes
1answer
164 views

Rear wheel touch frame during off saddle sprint

bike: Cervelo S2 Photo wheels: Mavic Cosmic Pro Carbon (wheel is true) tyres: Continental Grand Prix 4000S II 23mm Problem is that during off saddle sprint my rear tyre touch the frame and makes ...
1
vote
0answers
60 views

Replace Viner Settanta seat post securing wedge

My seat post wedge has been removed. There seems to be loads of different styles and shapes depending on the make and model of frame. Does anybody know if any other makes will fit it as having trouble ...
-2
votes
2answers
126 views

Are my frame and fork straight?

I have been riding bikes and motorcycles since I can remember. Doing no hands is no problem, my question is with this particular generic bike frame that I built: I cannot do no-hands riding. Is the ...
1
vote
1answer
120 views

Frame with dent

I recently bought a bike and then realized it had a dent on the top tube. I would like to know your opinion if it is safe to ride. The bike is a Devinci Cameleon made from double butted aluminium. The ...
14
votes
3answers
7k views

Can I glue this crack as a temporary solution?

I suddenly noticed a crack in my frame. Is it practical for me to use glue to seal it off as a temporary solution? Edit: Further information ...two incidents so far. Someone opened their driver ...
10
votes
4answers
3k views

Banged frame: Is it still safe to use?

My girlfriend's bicycle was vandalized by a neighbour. It seems like they banged it with a hammer or something right in the middle of the frame. Is this still safe to use?
0
votes
0answers
142 views

Where to get replacement bike frame cable entry grommets?

Does anybody know where to get more of these ? These hold shift and/or brake cable ferrules where the cables enter the frame. Here is what they look on a bike if that helps: These specifically are ...
2
votes
0answers
111 views

Please help me identify this bike frame?

Please help me identify this bike frame for I am a newbie/novice. I will greatly apppreciate it. It appears similar to some 1950s Huffmans, but I am far from certain. Thanks to all in advance who ...
3
votes
2answers
162 views

Headtube dent, how safe is it?

See picture below, I am in this situation with a new alluminium frame (don't ask me how I ended up here, it's a heartbreaking story.) It’s a Cinelli Mash Parallax. The headtube has a dent and I don't ...
0
votes
2answers
110 views

How to judge grade of carbon frame?

Last weekend, a friend told me about a local bicycle shop(Metro Cycles) selling a Carbon Cycle of Hamilton brand. This brand is sort of known in India but only for cheap bicycles. Later I figured out ...
-5
votes
1answer
67 views

IS THIS BIKE SAFE [closed]

https://lh3.googleusercontent.com/S1PKL2uMXwJc2aGjGEybc8ZM4CFk-i5EHWrkZxLSVaD29xUrfIig1ap1dp6Na-WsjMc-Tw=s85 I M LOOKING TO BUY THIS BIKE AND I WOUD LIKE TO KNOW IF IT IS SAFE TO RIDE
1
vote
0answers
106 views

Identifying a brazed steel frame

I'm trying to identify this brazed steel frame I came across. Any help would be greatly appreciated.
0
votes
2answers
74 views

Correct Frame Size Trekking Short Legs

There seem to be two heuristics for determining frame size without testing a bike: inner leg length and body height. I have an inner leg length of 85cm and a body height of 192. According to my inner ...
3
votes
0answers
176 views

Please Help me identify my Bike Logo

Hello can someone help me identify my bike Frame?. It has this weird Logo and a Serial number of : "2948" . It has Suntour Dropouts likely NJS. Thanks!
23
votes
4answers
3k views

Can road bumps excite frame eigen frequencies?

During my last bike holiday I have happened to ride downwhill on roads which had transversal stripes to mark the approaching of a turn. The stripes were made with road paint, and were slightly higher ...
4
votes
5answers
373 views

Is there any reason for the rear frame and bottom bracket to be asymmetric?

I just received a new non-brand carbon frame and immediately noticed that the bottom bracket looks to stick out significantly more to one side than the other, and the rear bottom forks also seem to be ...
1
vote
3answers
235 views

Riding wrong size frame

I’m riding Trek Domane 4.3 2015. According to my height (165 cms) I should be riding 52 frame size(according to Trek size chart). The current bike my riding is 54. The only modification I have done is ...
2
votes
2answers
503 views

Time trial carbon frame scratches. Should I concern?

While cleaning my time trial bike I've noticed many scratches in the frame. See pictures below. My tire pressure is usually around 100 psi, depending on the weather conditions or circuit. My wheels ...
1
vote
1answer
182 views

Paint scratch or carbon crack?

I might just be overly paranoid, but does the line in the image (to the left of the glare) look like a paint scratch or could it be a sign of a spreading crack?
-1
votes
1answer
63 views

What frame is 20" bike

It's the frame from a box bike stamped where the rear wheel goes on I don't know the logo.
3
votes
1answer
117 views

Identify bike brand to fit gear hanger!

I have bought a new used bike, I got it very cheap since it was pretty broken up. I have replaced most of the parts and repainted the bike so it looks fine. The only thing I have a problem with is the ...
3
votes
2answers
232 views

Is it safe to ride this frame?

I don't have a clue what happened… Got the frame this way. Mountain bike is Lapierre Zesty 2014.
6
votes
2answers
197 views

Where did I go wrong with this frame painting procedure?

I just painted a bike frame (steel) with the steps outline below. However, every glancing contact with a rough surface immediately strips paint from the frame and I can see the metal shining through. ...
7
votes
4answers
3k views

Bending back a bent head tube - is it worth trying?

I have a bike that was in a major front end collision (I T-boned a car). The frame is steel and the bike bent at the head tube, the welds seem to be fine. Pictures below. I am fully aware the ...
0
votes
1answer
129 views

How do manufacturers designate women specific designs on their bicycles?

Is there a tell-tale sticker or serial number code that can be parsed to tell if a frame is intended for men or women? Basically, can I take a serial number sticker and lookup somehow what physical ...
1
vote
2answers
143 views

Mild pain in lower forearms during biking

I feel some pressure and fatigue in my wrists and lower forearms during riding but not after it. I don't know whether it is due to weakness of my wrists or my suspicion that my 18" frame mount bike is ...
3
votes
3answers
118 views

Regaining frame aligment

I bought a belt driven bike which had had the rear triangle of the frame moderately bent (i.e. bent but no tubes collapsed or cracked) – it was a gamble as to whether it’s fixable…. It has a Nuvinci ...
0
votes
1answer
96 views

Correct frame bike for me

I’m trying to measure a cyclocross bike. I’m 172 cm, leg length 77.5cm. Some websites like ebicycles say that my bike frame size is 53cm. I’m already looking for this bike with seat tube 54cm. A ...
1
vote
0answers
237 views

BMX frame logo identification

I have a BMX frame with a stylised "h" on the rear forks. Can anyone ID it for me?
2
votes
1answer
134 views

Please Assist in Identifying This Frame!

I ran across this site and thought someone may be able to easily identify this vintage racer. My neighbor passed and left it to me and I was hoping to at least know what it was. He worked on bikes for ...
2
votes
3answers
140 views

Is it cheaper to mass produce a carbon frame than an aluminium frame?

I've heard this comment but I have not found any information about it. Is it true?
1
vote
1answer
155 views

Are bike frames galvanized

I'm sorry for the stupid question, but I have a primer that works on steel but specifically says to avoid galvanized metals. I don't really know how to tell if a metal is galvanized or what use-cases ...
6
votes
3answers
193 views

The Effects of Widening Seat/Chainstays

first time so bear with me please. I recently had to replace my rear wheel. Went to LBS and the only options available are 130mm spaced. I have a nice Specialized 1980s frame that measures 126mm. It's ...
0
votes
1answer
148 views

How can I fit this bottle holder to this bike?

I want to fit this bottle holder on my bike but the attachment seems too thin for the frame tubes. I believe this is a universal bottle holder and my bike isn’t of unusual size or tube girth. Am I ...
4
votes
1answer
315 views

Are these extra holes on the frame for disc brakes?

My mtb (SERIOUS Rockville), which currently has rim brakes, has these holes at the back of the frame and I am trying to understand their use. Are these for disc brakes? Are these for disc brake ...
1
vote
2answers
393 views

Are bicycle serial numbers no longer stamped into the frame?

I found this bike ad which detailed the serial number of the bicycle for sale. I was surprised to see its simply a sticker which is far from the indelible stamped digits and letters on frames I'd seen ...
2
votes
1answer
259 views

Installing modern Deraileurs in an Old type mountain bike Frame

Found my old mountainbike(steelframe) and i saw that its Rear Deraileur was worn out, was wondering would i be able to install a modern deraileur on a bike frame like this? I'd also like to ask if ...
3
votes
1answer
129 views

How to evaluate different alloy types used for bicycle frames?

Only certain alloys are used for bicycle frames besides other materials like carbon fibres (at least for the mass market). I often stumble over aluminium alloy 6061 and 7005 (and I think I saw 8004 ...
2
votes
2answers
526 views

Is it possible to fit a 36T chainring on a 34T frame?

I'm thinking of building a bike from scratch around a Commencal HT AM 2018 frame, which normally comes with a 32T front chainring (1x setup) and says it takes 34T max. However a 36T would be ideal for ...
1
vote
2answers
157 views

I am 1.7 m tall and bought a MTB with a frame that is 3-5 cm too big

The frame is 5 cm too big for me (in the length from seat to handles). I have major discomfort in my shoulders. After getting a shorter stem, the shoulders are 95% improved, but the "jewels" go dead ...
0
votes
1answer
139 views