Questions tagged [frames]
Bicycle frame construction, selection, maintenance, and repair.
617
questions
0
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0answers
119 views
Downhill bike frame conundrum
So I am starting a bike from scratch and really want a downhill frame as I'll be riding downhills and commuting. How and what parts could I use and add to the frame so it is able to commute though I ...
4
votes
1answer
98 views
What does the DIN number refer to …?
I am working on understanding this document for an n55 trike frame build ...
http://www.n55.dk/MANUALS/SPACEFRAMEVEHICLES/DIY.pdf
Particularly this line:
M6 SELFLOCKING NUTS, stainless (DIN985) - ...
2
votes
1answer
131 views
What make of frame
Could you tell me what company makes this frame please,it's all alloy with the letter M moulded into it behind the saddle stem shaft but no other markings.
3
votes
4answers
2k views
Should I buy this bike with a dent in the top tube? Is it safe?
I'm considering buying this used steel-frame bike. But the top tube has a small dent (about one-third of the way from the saddle). Is this a problem? I plan to use it daily (~6-7mi) for commuting to ...
0
votes
2answers
76 views
I have an 8-speed GT Aggressor Pro and I want to upgrade it to have 12 rear cogs
I found a really cheap 12-speed SRAM groupset, and I want to know if I can just get a new rear wheel or if I need a new frame.
7
votes
7answers
6k views
Can this crack in the steel chain-side dropout be welded?
I have a thru-crack on the driveside dropout near where it meets the chain stay.
The bike is an early 1980's steel frame Trek mountain bike.
See pics.
Bike rides fine otherwise and I have invested ...
0
votes
2answers
117 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 ...
1
vote
2answers
118 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
votes
2answers
248 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 ...
1
vote
1answer
78 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
votes
2answers
210 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,...
1
vote
0answers
77 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 ...
1
vote
0answers
155 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
votes
3answers
182 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
votes
2answers
472 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
votes
1answer
154 views
2
votes
1answer
59 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
votes
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 ...
0
votes
0answers
51 views
1
vote
1answer
205 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.
2
votes
2answers
85 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 ...
1
vote
0answers
29 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
vote
1answer
75 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 ...
1
vote
2answers
145 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 ...
1
vote
3answers
74 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
vote
1answer
206 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 ...
1
vote
2answers
734 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??
1
vote
0answers
92 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
votes
2answers
226 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.
2
votes
2answers
136 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
vote
1answer
249 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 ...
0
votes
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
votes
3answers
674 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 ...
1
vote
3answers
164 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
votes
0answers
253 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 ...
-5
votes
1answer
312 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
3
votes
2answers
678 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 ...
1
vote
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
votes
1answer
281 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
votes
2answers
205 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
votes
1answer
390 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—...
1
vote
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?
2
votes
2answers
259 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 ...
-2
votes
2answers
216 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
votes
2answers
580 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
votes
0answers
139 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 ...
10
votes
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 ...
0
votes
1answer
371 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
votes
2answers
228 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
votes
2answers
207 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....
