Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [frames]

Bicycle frame construction, selection, maintenance, and repair.

4
votes
3answers
1k views

Is it safe to use aluminium seatpost adapter (27.2mm to 31.6mm) for a carbon frame?

I have Cane Creek Thudbuster Seastpost (aluminium) 27.2mm x 400mm which i want to use for a bike with a carbon frame (31.6mm seat-tube). I'm thinking about getting a seatpost adapter/shim from 27.2mm ...
1
vote
3answers
2k views

Do I have a genuine GT frame, even though it's not engraved or stamped with the GT logo?

How can I know whether the bike frame I have is a genuine GT? I found the serial number u31036009 on the bottom of the hub. It has no GT logo stamp or engraving anywhere on it. Could it still be ...
2
votes
1answer
171 views

Is this a real Concorde or just a replica?

I'm confused with this, the lugs in this bike look identical with another Concorde but the tubing sticker clearly says "Reynolds". (Concorde only uses Colombus, right?)
-1
votes
1answer
59 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.
-1
votes
1answer
147 views

can you help me identify my haro frame?

Ive been searching on the internet and i could not find the name of this frame.
4
votes
0answers
463 views

Help identifying MTB frame

Apologies making ANOTHER one of these threads...Anyhows: Bought a bike third hand, frame has been stripped and painted. Trying to find make & model so I can get some offset bushings for the shock. ...
3
votes
0answers
152 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!
3
votes
0answers
296 views

Help identify this loop frame bike

I'm trying to find out more information about this old loop frame bike I'm planning to refurbish. I haven't found any other marks that may be identifying, if there's anything else I can take a photo ...
2
votes
0answers
65 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 ...
2
votes
0answers
294 views

Help identifying a Bianchi track frame

I've been trying to identify this Bianchi track frame - any help would be appreciated! Closest I've come is Eco Pista from early 80s, but I'm absolutely no expert on the matter. The numbers on the BB ...
2
votes
0answers
146 views

What kind of frame and brakes are these?

I just bought a bike and I can't figure out what kind of frame and brakes it has. I found that the derailleurs were made by DNB Japan somewhere around 1960 and that the handlebar is french (Guidonn ...
2
votes
0answers
86 views

Chain vs seatstay with a 50T Chainring - BMX frame

I plan to put a 50T chainring on my bmx but I am afraid to have an interference between the chain and the frame. Does anybody know what is the critical distance between the seatstay and the chain so ...
1
vote
0answers
102 views

Identifying a brazed steel frame

I'm trying to identify this brazed steel frame I came across. Any help would be greatly appreciated.
1
vote
0answers
144 views

BMX frame logo identification

I have a BMX frame with a stylised "h" on the rear forks. Can anyone ID it for me?
1
vote
0answers
97 views

does anybody recognize this mtb frame?

I just got this frame for a few bucks and I wonder if it is from a known manufacturer or not. I often find bikes with similar design aspects, but not this frame. There was also a Marzocchi 55 ETA from ...
1
vote
0answers
129 views

Can anyone identify this second hand bike?

I am looking into getting a new (for me) road / TT bike and this came up but I think it isn't a Specialized Shiv... many thanks
1
vote
0answers
1k views

Lowrider style bent forks techniques

Would a 24 inch bent fork fit on a 20 inch frame? Is there even a 24 inch fork? Would a 26 inch fit? Also if it doesn't fit in could I just add to the 20 inch - would you be able to extend it making ...
0
votes
0answers
39 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 ...
0
votes
0answers
65 views

Help to identify raw prorotype frame

The frame is aluminum and looks bulky but only weights 1/2 a pound there are no stamps no stickers and no numbers anywhere on frame I was told it could be a prototype
0
votes
0answers
94 views

Monstercross gravel bike: Will a Salsa Warbird frame fit 45mm Riddlers on wide 28mm rims?

Will 45mm WTB riddlers on wide 28mm internal width rims fit between the rear chainstays of the Salsa Warbird? I'm building a set of monstercross wheels for my Salsa Warbird, but before purchasing the ...
0
votes
0answers
98 views

What are the most common frame materials?

Does anyone have stats on how many bikes overall there are worldwide based on frame material? Either percentage or count would be sweet to see. Bonus if it's broken down by country-level and/or type ...
0
votes
0answers
58 views

I need some help with frame model

i thinking about buying this bike, its posted on some auciton portal. unfortunatelly, the guy doesn't know frame brand. maybe by any chance there is someone, who knows it?
0
votes
0answers
199 views

Help 9mm axle in a 15mm hub on the rear

Im getting a new back wheel for my norco charger 7.2 and the frame only takes a 9mm qr, the new wheel i will be getting the mavic crossride mtb 2017 has a 15mm hub any suggestions on what i can do?
0
votes
0answers
116 views

What kind of bmx frame is this

The serial number starts tr110 and the bike is really light:
0
votes
0answers
109 views

Bicycle chromoly frame repair in Boston

I just broke my steel chromoly frame. You can see a picture of it below. Is there a good place to go to in the Boston area for this kind of repair? Should I just go to a generic welder and hope for ...
0
votes
0answers
143 views

Does anyone know the model of this Legnano bike?

Hi everyone, I've recently just bought this bike for a really good price with the intention to work on it (a new paint job etc..) yet, I can't seem to figure out the model of the bike. I've done ...
0
votes
0answers
142 views

Bike Frame Brand and Model?

enter image description hereI purchased this bike at a thrift shop and it rides like a dream. Out of curiosity I'm trying to figure out the make and brand. The parts on it seem to be very nice so I'...
0
votes
0answers
145 views

What frame is this?

could you help to find out the brand, type, & year model of this MTB frame (attached) ? Best regards.
0
votes
0answers
273 views

Help identify this frame

I'm not sure what brand this is at all. Any help would be much appreciated. I've tried looking up the serial but i am unsure what the last serial number is. It appears to be a "b" or "6" but I am ...