Questions tagged [frames]

Bicycle frame construction, selection, maintenance, and repair.

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2
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0answers
16 views

Options to fix a stripped driveside BB thread- Shimano BB-93 [duplicate]

I removed the BB (Shimano BB-93) from my Canondale Trail and found the drive side thread is stripped on BB and frame. See and What are the options for me to replace the BB? Is there an alternative ...
-1
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1answer
60 views

Can anyone help identify this stamp please

Need help to identify this bike please
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0answers
115 views

Help me identify bike frame. Repainted, but have serial number

I got this bike second hand, accordingly to the previous owner it should be a rocky mountain. He said that he repainted the bike and created new stickers for it. I couldn't find a similar rocky ...
1
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1answer
59 views

Bottom bracket compatibility

After two LBS's, a blowtorch and a tyre shops impact driver I finally have my bottom bracket out. It an aluminium frame if that makes a difference. On the drive side some of the thread is gone, ...
0
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1answer
68 views

Can anyone tell me what make or brand this frame is? [duplicate]

I can't figure out who made this or what brand maker it is. It has the serial number and on top of it it has a different number. G0Q230-2 Wbdo26l0431p
0
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5answers
191 views

Why are bicycles triangulated at the back but not at the front?

I know that triangulation of structures makes them stiff. Why are bicycles stiff at the back but not at the front?
5
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2answers
128 views

How can I repair carbon damage near my bottom bracket?

I have had a few gnarly chain-drops that ate at my Open U.P. carbon frame. I thought I just had some chips in the carbon, but today I removed my crank for a full bike clean and realized that the ...
3
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0answers
85 views

Void in carbon frame seat tube, is it dangerous?

While assembling a carbon bike, I found this void in its seat tube. It's about 1/2 inch X 1/4 inch in size and I'm guessing almost a third to half the depth of the tube wall. Since it's right next ...
-1
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2answers
120 views

I need to find out what type of bike I have I just got it

I need to find out what type of bike I have I just got it
1
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3answers
727 views

Can anyone help me with identify this Giant bike?

I need a name for this bike so I can look into it. It's going to be sold to me but I don’t want to get ripped off. Thanks!
3
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0answers
49 views

Identify vintage bicycle brand

I don't know much about bicycles but I came across one that I want to offer to my nephew since he is into vintage race bikes. I would like to know the original brand of the bicycle/frame since I want ...
4
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2answers
130 views

Why can compact frame in road bikes be made in less sizes than the traditional frame?

When I read about Giant, they talked about how in the past road bikes have to be in like 10 incremental sizes, but Giant had an idea from a mountain bike (which usually only have S M L sizes) to make ...
2
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1answer
41 views

Back wheel rubs against the back brake pad when riding

My aging 26" Nishiki 10 speed is still a great bike and ride and well maintained. 25yr warranty ended in 2009. I am 6'7" and 280lbs now and was 250lbs when I purchased it. For some strange reason now ...
2
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2answers
294 views

Can anyone tell me the specific year and model of this Benotto bike?

I’m inexperienced and just wanted to work on refurbishing this as a side project but thought that knowing what I was working on was a good place to start. Only other identifying factors are a ...
1
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1answer
225 views

What size adult tricycle? [closed]

I am 5 foot tall (152 cm) and have a 25 inch (63.5 cm) inseam. I am unsure as to which size of wheel/frame to buy. Also, recommendations for adult trikes, no more than $400 would be appreciated.
2
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1answer
57 views

Help identify antique rear steer tandem bike

I'm trying to identify an antique tandem bike. I have looked at over 6000 of them on the internet with no luck. Many are similar, but this one has some unique items. Not the top rail, it stops at ...
3
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0answers
89 views

Carbon frame chipped by chain - how to repair?

I found out my chain is damaging my frame near the cassette. How can I repair this? It was damaged by my cassette in the indoor trainer which I am not using anymore. This is how it looks:
2
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3answers
44 views

What width between dropouts is suitable for a hub of Xmm?

For a hub of 120mm, what would the dropout spacing be on a typical frame? Or for 130mm, or other sizes - in each case, how close to the hub width should one expect the frame spacing to be?
2
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1answer
248 views

I need help with identifying my 26" cruiser, no ID markings, I built it 25 years ago and could be 15+ years older than that.. TIA

Bottom bracket and rear brake (click for larger): Bike frame and chainring (click for larger): head tube (click for larger):
2
votes
2answers
169 views

What 1990's bike have I bought?

I've not had a road bike since I was about 16 which is too many years ago to want to remember so forgive my ignorance. I can remember that Cannondale were said to be good back in the day so I've ...
0
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0answers
75 views

HELP!! What is this bike frame?

Hello all, I've won this triathlon frame on Ebay for £150 but have yet to pay. Apparently Vision have never made frames and deal only in components (according to their customer service). Is this some ...
3
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0answers
93 views

Bike Frame Identification

Does anyone have any leads on what make/model/year of frame this is? I spotted this bike last summer and it's been nagging at me ever since. I love the design and am trying to track down who is ...
3
votes
3answers
419 views

Swapping parts from old bike to new frameset

I have a Piave (around 2009-ish year) road bike with a frame that has become to small for me. It has pretty good components i.e Shimano Ultegra and threadless stem etc. There is a 2014 S-Works Venge ...
3
votes
2answers
68 views

Deformed Headtube Around Bottom Cup

Crashed into a fallen tree at speed on my bike. I disassembled the front end to inspect for damage and noticed I could wiggle the bottom headset cup back and forth slightly. On further inspection, the ...
4
votes
1answer
180 views

Can you identify this “BSB 400” steel frame?

I was given quite a nice old tourer some years ago. I think it was a custom-built frame. The only identification is "BSB 400" in a 1980s typeface: It's Reynolds 531, has cantilever bosses and 130mm ...
2
votes
2answers
69 views

Bottom headset cup doesn't sit flush

After a crash, I noticed my bottom headset cup was no longer sitting flush with the frame (see the right side of the image below). If I grab the headset cup I can rock it back and forth slightly. No ...
7
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2answers
839 views

Cycled through pothole on carbon frame - damaged?

Yesterday while out on my daily exercise (I live in London) I had to cycle through a pothole (bus too close behind so couldn't swerve or stop) that jolted the whole bike. I then noticed a rattling ...
9
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4answers
262 views

Help Identifying this bike frame

I recently bought this bike from a non bike person who didn't know anything about it. I've looked at thousands of pictures and hundreds of websites and I cannot find this frame. So, that means it is ...
1
vote
1answer
87 views

Frame with a tapered headtube - fork compatibility

I've seen a couple of different questions that have touched on this topic but after having read the answers, I'm still not confident. I'm doing my first bike build and so far I'm just trying to put ...
3
votes
1answer
74 views

What are these two “clips” on the bolts holding by rear disc brake bracket to the frame? [duplicate]

My rear disc brake is attached to a bracket, which is attached to the frame. This bracket is held by two bolts that each have a clip on them: The clips are clamped around the bolts, and can easily be ...
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0answers
31 views

Help identifying bmx bike [duplicate]

Acs7i07516 is my bikes serial number and I just want some info about the bike, I couldn't find any info so I was wondering if anyone else knew about this bike,any info would be appreciated
4
votes
1answer
145 views

Suitability of open sided bearings for frame pivots

On a 10 year old bike I am trying to replace miniature frame pivot bearings which measure 9mm x 17mm x 4mm, pictured below, and are sealed with 689z stamped on. They must measure the same dimensions ...
8
votes
3answers
2k views

Which measurements are most important to consider for tall men?

I am 6'8" and 255lbs so my figure is a bit between Kevin Durant (not as skinny) and Lebron (in shape but not as muscly). For smaller bikes such as what you would find in Wal-mart, I frequently see ...
0
votes
1answer
105 views

Help identify my bike frame

Please help me identify a mystery bike that I purchased at a garage sale and have grown to love. I am not sure what is original to the frame but the bike has a 56cm frame, Shimano SFR rear dropout, a ...
3
votes
2answers
646 views

How often do you need to lubricate alloy seat posts

I own two tourers which I normally relubricate their aluminium alloy seatposts every spring with high quality grease. Due to moving to Cambridge and the coronavirus outbreak, both cycles are being ...
0
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2answers
135 views

Need help identifying a frame

Recently bought a used bike, the guy who sold it said it was an 80s/90s Schwinn steel frame. Checked it with a magnet so I'm pretty sure it's steel but I'm not sure about the model, brand, or the year....
1
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2answers
808 views

How to get water out of the frame?

Now the (seatpost and QR) has been practically replaced by an (internally routed riser setpost) tightened with a torque wrench. I disagree with the accepted answer here - sometimes above 1 liter of ...
2
votes
1answer
77 views

22 inch frame mountain bike for someone who is 5'8"

I'm 5'8" and had my mountain bike stolen in the fall (bummer!). Just found a really good deal on a 2015 Giant Revel but it's got a 22 inch frame. Would this be unsafe/unpleasant enough that I shouldn'...
1
vote
2answers
115 views

Help with choosing steel frame

My most recent bike was a Trek Domane SL6 that I loved, but the frame has started to show some cracks and I am looking at switching over the Shimano Ultegra components to a steel frame. I am a big ...
3
votes
2answers
94 views

Bottom bracket damage work-around

I built up a Specialized Rockhopper over this last summer, ending up with a sleek, blacked out, Deore & XT equipped thing of beauty. During a brief stop at a buddy's place, the 12mm Kryptonite ...
1
vote
2answers
101 views

Is it possible to change a painted frame into a chromish one?

I have a fixed gear bike and I'd like to give him a fresh start. It's all painted in blue and I'd like to know if it's possible to obtain the chromish color on the links between the tubes (it's an old ...
2
votes
1answer
122 views

Dent on aluminium frame?

I have a Cube Stereo 120 2018. When I was driving today a car hit me. I'm fine but the bike has a dent in it made by the car door. Can it be fixed? Can I still ride it, and go MTB? Can I make a sort ...
3
votes
1answer
466 views

Repair frame with crack by seatpost clamp

Is it feasible to repair a crack in a frame around the seatpost clamp? Being an aluminium frame I understand soldering is problematic. It doesn't matter if seatpost is fixed in place as per a solution ...
0
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0answers
126 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
118 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
172 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
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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
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2answers
425 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.
8
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
126 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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