中国联通停牌待混改 主题基金又迎来下一个风..
百度 持续多年的经济快速增长，让大多数人受益。
Bicycle frame construction, selection, maintenance, and repair.
24 questions from the last 365 days
3
votes
0
answers
63
views
Books for beginner frame building
Having watch a number of YouTube videos on bicycle frame building, I would like to try it as a hobby.
I've started to buy some things for a bike frame jig from Ideas2Cycle and I am about to get the ...
- 1,440
4
votes
2
answers
232
views
Consequences of bottom bracket spacer
The smallest chainring on my bike is just rubbing on the chainstay. The crank arms and chainrings are vintage Campagnolo so I would really like to refrain from changing them out. The bottom bracket is ...
- 2,061
-1
votes
2
answers
169
views
What bike model is this
Someone wanted to trade an item for this bike
But I can’t find this frame anywhere for a cannondale e-bike. Can somebody help me out?
1
vote
1
answer
94
views
Guesses on frame brand?
So, my frame cracked while riding today. It's an aluminum frame, so there's no point in trying to fix it afaik. After a suitable mourning period I started looking for a replacement frame and found ...
- 1,130
6
votes
3
answers
236
views
Indent on drive side of rear triangle near dropouts normal?
I picked up a 1991 Bianchi Ibex mountain bike that is in rough condition. During disassembly I noticed that the two tubes on the drive side rear triangle have indents which are not present on the non-...
- 2,061
1
vote
4
answers
204
views
Why are there no mainstream, ultra adjustable kids' bikes?
Parents (understandably) don't want to spend $400+ on a quality, durable, and long lasting bike if it's only going to fit for 1-2 years. But a good, kid's pedal bikes for less than $400 is hard/...
- 834
11
votes
2
answers
2k
views
Why do modern bicycles have tubing which curves and has non-circular cross-sections?
Based on looking at vintage bike catalogs (up until the mid aughts), it appears that the vast majority of bicycle frames feature exclusively tubing which (1) has a circular cross-section and (2) is ...
- 2,061
6
votes
5
answers
1k
views
What are the biggest factors determining ride comfort, specifically for steel road cycles?
I have two very similar vintage bicycles (A and B) that feel surprisingly different in comfort, and I have been trying to improve the comfort of the worse-feeling one (B). I am wondering which changes ...
- 635
4
votes
2
answers
785
views
How bad is this paint chip and does it likely damage the frame?
I am shopping for a gravel bike for my teenage boy and saw a used one in good condition, but with some paint chips on the non-drive side chainstay, both outside and inside as shown in the images (can ...
- 311
1
vote
0
answers
97
views
Does anyone know the make and model of this frame?
It has that GT Mach one rear style but it’s opposite
1
vote
0
answers
67
views
Help identifying titanium track frame
I recently picked up this titanium track bike on Facebook Marketplace, but neither the seller, nor I, had any idea who actually made the frame / what frame it is. Possibly it was made custom? The fork ...
- 11
12
votes
6
answers
3k
views
Why don't bicycles have the rear sprocket OUTSIDE of the frame spacing? (Single speed)
because having to use a tool seems pretty dumb, while it could simple to put the sprockets outside, I know it would put a little more weight on sides but it doesn't seem particularly significant, ...
2
votes
2
answers
365
views
Determine dropout spacing for vintage bike frame online
I've been trying to find a decent steel-frame mountain bike on Facebook marketplace, and there are many catalogs available with specs like this one. However, so far as I can tell they only give the ...
- 2,061
10
votes
3
answers
3k
views
I was given a used road bike, should I be concerned about the age of the frame, and can I replace it and reuse the other parts?
A neighbour gave me a road bike, it's a 2007 Condor Squadra from "Condor Cycles". It's a aluminium/carbon frame with Campagnolo Chorus group set, 10 speed 11/25t cassette with 50/36t ...
- 1,440
1
vote
0
answers
82
views
Carbon frame impact, what should I do? [duplicate]
I have a Yeti SB-5c(carbon) full suspension, rides great. Today I was riding, and the downtube hit a root covered in leaves(around 15-20mph). I was at the start of my ride at that point, and kept ...
- 11