Questions tagged [frames]

Bicycle frame construction, selection, maintenance, and repair.

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2answers
95 views

Frame size is smaller than recommended

I'm 191 cm tall and I want to buy UPTEN ZERO, the problem is the biggest frame size is "L" and is adapted for (173cm - 185cm) only, my question is it ok to ride a small bike? dose it effects me or ...
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2answers
84 views

Help identify BMX please - possibly 80s or early 90s

I recently picked up this old BMX bike for AU$5 at a garage sale. I was originally only interested in the Skyway Turbo Disc chain wheel, but decided I would strip the whole thing and give it a new ...
3
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2answers
229 views

How much flexibility is normal for steel frames?

I have an 1980ies steel road bike which I used to ride clipless pedals on. I have recently switched to platform pedals for commuting and found out that when I'm coasting and move my feet left and ...
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1answer
73 views

How do the wheels attach on this trike design?

How do the wheels attach on this trike design? Here are the design drawings. If you go to the section titled Steering Bridge Components you can see were it should attach. However it does not show ...
3
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2answers
199 views

How to degrease a bicycle frame?

I have a carbon frame which I'm worried I will scratch the paintwork on. I know the basics of cleaning paintwork without scratching it, using two buckets, one to rinse and one to wash with, grit guard,...
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0answers
67 views

identifying a mtb frame

about one or two years ago my brother has brought this bike home and i am now thinking of restoring it. It has an alloy frame unsure of the size but the wheels are 27.5", feels strong and solid... But ...
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0answers
150 views

Can anyone identify this green frame?

Like many others, I found this aluminum frame bike that is pretty light and in great shape. The bike has been converted to disc brakes and I believe that everything is aftermarket. Serial number ...
4
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3answers
177 views

Installing gear cable guide on 80s Holdsworth

I have this Holdsworth frame that I got repainted and am rebuilding with mostly modern parts - I recently realised that I'm not quite sure how to run the derailleur cables past the bottom bracket. I ...
2
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2answers
465 views

Titanium seatpost in steel seat tube, good idea?

I want to use a titanium seatpost in a frame with a steel seat tube (Columbus Spirit tubes). Is it a good solution? I want to understand if the metals play well from a structural point of view, and I ...
4
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1answer
154 views

Will these dents make this aluminum bike frame unsafe

Yeah is this small dent fatal?
2
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1answer
57 views

Building a 700c bike. Hub sizes

Trying to build a bike on a cyclocross frame. So the wheel will be 700c. Need hubs. Fork size is 100x15 with thru axle. Rear drops size 142mm x 12mm thru axle also. So it means I need any hubs which ...
5
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3answers
1k views

Is it safe to run disc brakes up front on a mountain bike that lacks a disc caliper mounting point in the rear?

Upon sharing my thoughts in an answer to a Bicycle Stack Exchange question, I wondered about my suggestion to use a disc brake up front on a frame that, lacking a disc brake caliper mounting point at ...
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0answers
50 views

BMX bike brand frame

Can you help to tell me what this frame is
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1answer
196 views

What brand of frame has a star cutout behind the seat?

What bmx bike has a star cut-out just behind the seat? sealed bb.
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2answers
73 views

How is chainstay length defined for frames with horizontal dropouts?

Just reading our own definition of Chainstay Length in the terminology index. It is written currently as the distance between the centre of the chainring and the centre of the rear cog. This is ...
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0answers
27 views

Rear shock mounting hardware for Felt Virtue 2015

I recently bought a Felt Virtue 2015 aluminum frame. Just wondering if anyone else who bought the same frame have the correct sizing for the rear shock mounting hardware. For reference this is the ...
1
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1answer
70 views

How to treat rust spots on a steel frame without stripping the paint completely?

I have a 1974 steel French road frame and most of the original paint is still intact. However, there’re quite many 1-2 cm surface rust spots. I also recently had one of the lugs partly re-brazed and ...
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2answers
139 views

Bought a frame one size larger, how to fit for slightly smaller rider?

I've recently bought a frame that is about one size larger. It's a 22" frame and my height is about 5'9". I had a choice between the 22" frame and an 18" frame so I chose the frame that was a bit ...
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3answers
72 views

Identification of non-standard frame feature and suitability of frame for mid-drive e-bike conversion

My question comes in two related parts: firstly, what is the piece of folded, drilled metal projecting rearwards from the lower bracket in the photo above? Secondly, does this piece of metal have ...
1
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1answer
190 views

Bike too big or just fine ? modification required ? Need pro advice

Hi I accidentally refer to wrong bike fit and purchase online a 20" Frame Mountain bike (XC hardtail)! While the bike is about 20" (51 cm) Frame , I'm about 175 cm (5 foot 9 inches tall and go 79.x ...
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2answers
352 views

Can you change your skewer frame into to thru axle one?

I have a frame that uses QR skewers. Can I modify the frame to use thru axles?Has anyone done it??
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0answers
90 views

Help in identifying our newest project

Any help getting info on this bike would be great. Only tags/badges are a Japan stamp and a diamond with a 5 in the middle under the frame. Thought maybe a Japanese knockoff from Schwinn but the bars ...
3
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2answers
219 views

What type of bicycle frame is this?

Need help with identification. If anyone knows what kind of bike has the rear fender built in to the frame, that might help.
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2answers
133 views

Is “touring bike” a common term in the USA?

Just researching some bikes online and, being from the UK, I cannot find any bikes on US websites called 'touring bikes', as we'd commonly call them in the UK. By this, I mean bikes which come with ...
1
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1answer
194 views

Remove stickers and decals from frame

I am trying to remove the stickers/decals so I can repaint the bike. I have tried scrapping, paint thinner, and xylene. I also tried using a heat gun, but the process seems rather tedious. Is there ...
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1answer
35 views

Identify tandem frame with no LK99040060 [duplicate]

Looking to identify my tandem frame It was bought without decals and buyer claimed it to be a Gary Fisher but I want to know for sure before I have it refinished. It has eccentric bottom bracket ...
4
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3answers
647 views

Is this crack on my seat stay mechanically safe?

Recently picked up a steel frame and realised there was a crack on one side of the rear triangle, right by the seatpost. Crack seem to be contained towards the outer part of the tube so does not seem ...
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3answers
161 views

Can a Mamachari be fitted with an 11 speed 52-36T crankset and FD?

I would like to upgrade this bike with a better and faster crankset, 52-36T, but I'm confused if my planned setup will be compatible with the bike I have. I have consulted in our local bike shop and ...
5
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0answers
239 views

Scrap it or not

I purchased this Bottecchia full-carbon frame a a few years ago and built it up using Shimano 105 components. Shortly after the build was done it came off the rear mounted rack on my car and went ...
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1answer
185 views

How can I identify my bikes make through the serial number?

I can't identify my bike so I was hoping someone could help me... The serial number is AX365316
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2answers
649 views

Install suspension forks on non-suspension bike

I have a 1990s Saracen PowerTrax. Is there a way I can install a suspension fork, or will that muck up the bike somehow? I'm actually interested in ways to raise the bars with respect to the seat, so ...
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1answer
76 views

What is the age of my columbia clippe bicycle, maunfactured by westfield Mfg.?

My bike is a columbia clipper manufactured by westfield mfg. Crank bottom serial # starts out B...083 can anyone tell me its age. I'm in the process of restoring it.
3
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1answer
249 views

How to / is it possible to straighten a bent seatstay/chainstay on a steel frame? At home or inexpensively by a professional

I have a Genesis Croix de Fer 20 (725 Chromoly) and crashed with my friend on his bike. On one side the back of the frame bent out so the wheel drops out, it is bent but not crumpled. I would like ...
4
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2answers
187 views

How important is it to re-space my rear hub?

I just bought new wheels for an older Schwinn frame. I don't know the date it was made, but it's a steel frame and as built it had stem shifters and a cup-and-cone bottom bracket, etc. Probably from ...
3
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1answer
328 views

Identify this BMX logo please?

Hi all, having trouble identifying this logo found on my Bmx frame- any ideas? Many thanks More info: It was bought with all high end parts- and was said to be WTP Justice or other WTP frame—...
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4answers
254 views

Can this frame be used or is it done?

I have a cheap mens Huffy mountain bike which I noticed has 2 holes in the frame. Would this be too unsafe to ride?
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2answers
254 views

Is this damaged aluminium frame unsafe to use?

Hello I have a Giant Seek 3 aluminium frame where somehow the rear rim has rubbed the frame creating a hole as shown in the picture. On the other side there has also been some rubbing/scratching but ...
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2answers
186 views

Can you tell me what this frame is and year please

I need to identify a bmx frame i have Its a twin top rail
2
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2answers
569 views

Bent Peugeot Carbolite 103 Frame

I have a vintage Peugeot carbolite 103 frame which is really bent. The rear triangle is bent in the direction of the drive side to such an extent that the drive side crank arm is blocked by the frame ...
2
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0answers
131 views

Can anyone give me some information on this Peugeot frame I bought this weekend?

I've been looking through old Peugeot brochures and searched the numbers on the frame but I cant find any pictures of any Peugeot bikes that look like this one. The chrome section with the flags of ...
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5answers
3k views

Frame failure sudden death?

I had a serious accident, my fork suddenly snapped when riding. I sent my bike for repair (to get a new fork installed) and the guys at the shop hammered the frame in place, as apparently the frame ...
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1answer
331 views

Why would a frame lack serial numbers?

Other than being a custom frame or it was stolen is there a explanation for the frame to be missing the serial numbers? For instance do they use the same identification marks over seas?
4
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2answers
212 views

Help identifying make of steel elevated chain stay mountain bike frame

Could anyone tell me what is the make or model of this bike there are no visible numbers or name except for this sticker of the maker of the seat tube. I appreciate all the help. you guys know your ...
2
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2answers
178 views

Help please - Dent in top tube of double butted aluminium frame

I have a ridgeback velocity which is labled as double butted aluminium. Around the middle of the toptube is a dent shown in the photo. There is also a short line above it which I can feel with my nail....
6
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1answer
139 views

Prevent internally-routed cable housing from vibrating against frame

The rear brake cable and housing are internally routed through the top bar of the frame. It rattles around when riding on bumpy roads and sounds annoying. What's the best way to mitigate this?
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1answer
81 views

Frame identification

Any idea of the maker of this carbon frame, if more photos needed just let me know
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3answers
462 views

Frame adjustment for engine

I want to turn my bike into a motorized one, but i can't get engine clearance because the 2 tubes in the picture are so wide on my bike. I was wondering if I cut those tubes and replace them with ...
3
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1answer
247 views

What bicycle manufacturer used this emblem

The top bar has the model name "AMERICANO" but I don't know the name of the frame manufacturer. I would appreciate your help identifying it. Thank you
5
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2answers
201 views

Cracks in paint on aluminum frame

I noticed some small cracks in the paint on my aluminum frame bike. The cracks are clustered around the rear brake boss, and only on one side (NDS). The bike is from 2011 and has been ridden over 10,...
4
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1answer
173 views

“bent” by design frame

Lately I have been looking on new bikes, and I have seen some design on an aluminum frame which left me quite dubious: That bend seems to scream "I am gonna buckle at the first hard hit!". Are my ...