Questions tagged [frames]
Bicycle frame construction, selection, maintenance, and repair.
946
questions
8
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Accidentally punctured through aluminum frame with a screw tip - still safe? Repairable?
I went to tighten up my rear rack and realized that it was actually a screw not a bolt holding one of the arms on my rear bike to my frame. Apparently I stupidly used a screw that's longer than the ...
- 81
1
vote
2
answers
49
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My rear dropout notch is 12 mm (roughly 1/2"), am I correct in thinking a 3000 watt rear hub motor axle won't fit?
The bike is a Seattle Micargi stretch
The rear dropout width is roughly 180mm and the rear axle dropout notch was widened to 12-13 mm to accept a thru axle rim with a 12 mm axle. With the notch being ...
- 11
0
votes
0
answers
32
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Trouble finding frame hanger Daymak to Shimano RD-R3000
Having a really tough time finding the following part:
Frame hanger
3/4inch 1.9mm width screw holes.
Frame # DMK17PR000000004
Derailer # RD-R3000
I've ordered a few, but there is always something ...
9
votes
2
answers
5k
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What is the purpose of the top tube on bicycles?
What is the purpose of the top tube on bicycles? To neuter guys? My brother crunched his balls so hard on his bike, poor guy.
- 149
3
votes
1
answer
319
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Scratch or crack in alloy headtube?
I was going over my bike in preparation for the season, and noticed these marks on both sides of the bottom side of head tube, near the weld to the down tube. I can't find any other marks on the bike ...
- 31
3
votes
1
answer
271
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Identify year of Kona
I have a Kona Process 134 DL. The serial number is H5AH31229 and I am trying to determine the year. There is also a sticker EN14766. And stamped 4, then under XL, then under T. Can anyone help?
...
- 31
0
votes
0
answers
37
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Help identifying this Freeagent bike?
so I’m considering the purchase of this bike but all the information about it provided is that it is a Freeagent bike. There are asking $150 and depending on the model/year that may or may not be a ...
3
votes
2
answers
129
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Help identify early 90s Chro-Moly MTB
I have this Chro-Moly bike I bought in the early 90s in Chile branded as Oxford, but I believe the frame is an import. One mechanic said it is japanese, another that it's italian. The rear part of ...
- 31
0
votes
0
answers
25
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2012 Cervelo R3 downtube cable stop - replacement part
I need two replacement downtube cable stops for a 2012 Cervelo R3. Does anyone know where I can get them? I found 1 for $50 which is outrageous.
Any advice or leads is appreciated!
Greg
- 1
6
votes
3
answers
2k
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Is it correct that the bottom bracket shell thread does not go all the way around?
On the inside of the bottom bracket shell, the thread does not go all the way around. At the places where the tubes are welded (or attached) into the bottom bracket shell, there are holes in the ...
- 579
0
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0
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36
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Question regarding serial number
Can anyone help me decipher this serial number on my DB? ACS6J02432
I am trying to figure out the exact year and model of this 24" BMX
1
vote
1
answer
86
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Heavy corrosion of the bottom bracket shell, but rest of the frame is fine
I have a Btwin MyBike cycle, which is now 8 years old. The frame is an steel alloy.
I want to replace the bottom bracket, chrank shafts & chain ring.
The BB was very difficult to remove, used a ...
- 165
5
votes
1
answer
124
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rear rack > frame compatibility (child seat)
I have a Topeak BabySeat II MTX 2.0 Rear Rack that is supposed to mount into threaded holes in the frame. However, my old road bike does not have these holes, and instead has eyelets welded to the ...
- 51
1
vote
1
answer
296
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Help me identify the model of this Cannondale frame
I tried everything, saw many catalogues and also tried with the serial numbers but still nothing.
this is the serial code I think. From what I can read I see it's BNRB300131 and the other code is ...
- 21
2
votes
1
answer
614
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Reynolds double butted 531C top tube rusted, worth repair or not?
Pictures show underneath of top tube. Tube made of 25.4 mm (1 in) Reynolds 531C steel. Rusted through, cleaned a little with file, and most material is still there. Is it worth repairing? Carbon fibre ...
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