New answers tagged frames
I do not have a dahon brand bike, but folder latches are all reasonably similar because they do exactly the same purpose. Latch in closed position, with safety removed. Front of bike is to the right. Latch half-opened. Notice the lever is connected to the latch by a cam mechanism, so as the lever moves the latch moves. You cannot have the latch closed ...
Women's bicycles have the front tube designed to curve down for their skirts, else while moving fast against the air may cause embarrassment whilst in public.
Back in the day, women primarily wore dresses, and getting the dress over the top tube was difficult and awkward. So the women's bike was developed with a slanted or sloped top tube so women could step though with their dresses and ride without their dresses coming up. Although the top tube shouldn't be hitting you in that "embarrassing part" when you're ...
Frames designed for women do have that part - its called a top tube. Historically women wore skirts, so a lower frame in the middle made it easier to mount and dismount, and was less likely to accidentally show an ankle. This picture shows a modern "woman's frame" with the top tube paralleling the downtube, and attaching to the seat tube lower down. ...
Why do you want the bike? If you just want to have it in your collection, go for it. If you want to ride that bike fast and long, look for metallographic laboratories in your region. No one knows why the boss was ripped off. There are several methods of non-destructive fractography and they are able to assess the structural integrity far better than you or ...
You'll need to very carefully inspect the area around the boss that's been ripped out, as well as your usual second hand frame check. If the bike was ridden after the damage cracks could easily have spread and you might be well on the way to a two piece seat tube. This groove could be the start of a problem, but it's probably just a scar from where the cage ...
Was this likely caused by my stupidity? I wouldn't go that far, but play in the stem/headset assembly certainly could have been a contributing factor. Just take a second to imagine to torque and force applied to that small area below the weld when you hit a curb or pothole if the assembly is not tight. The bottom of the headset is somewhat wedge shaped, ...
Is there anything I should consider doing to reinforce or protect further damage? In my opinion, the frame is toast. You can drill a hole ahead of a crack to try to keep it from spreading. Determining where "ahead of the crack" lies is guesswork. You can't see where the crack ends because: it is three-dimensional: it could extend farther inside the ...
Maybe it's because the fork is too large for the frame.Therefore,causing the crack.
It's probably a Phillips brand English roadster. The lugs on this example do not match the picture, but the strange looking rear fork and BSA bottom bracket are typical on English 3 speeds.
Carbon fiber is durable. Unfortunately, carbon frame is not just make of pure carbon fiber, but instead it makes of carbon fiber reinforced polymer - composite carbon fiber. The carbon fiber may withstand the test of time, but the polymer is subject to degradation.
The other question to ask is the length of the top tube and how that compares with what you have. I agree with Kibbee that it sounds like with an 80 cm inseam, you should be on the larger bike. Still, it is easier to get a long stem on a smaller bike if it fits otherwise.
Are you referring to the way the seat stays bow inwards asymmetrically when looking at the bike from the back? If so, it's intentional and part of how Cannondale implements shock absorption on their road bikes. The seat stays flex to absorb shocks and are not symmetrical because of the space taken up by the cassette on the drive side.
Its a chain hanger. Purpose is to hold the chain when you take the wheel off. The idea is to support the chain and stop it falling through itself, making a tight loop and shortening the life of those links. They're not common on carbon bikes any more, but handy on any working bike. Don't forget to undo the chain after reinstalling the wheel and before ...
Despite what others have said, a warranty is a bona fide contract between the company and you. It's used in the selling of the product thus is covered by decent consumer protection law (in the UK anyway). This article from Which suggests a good process to follow. Keep a record of the contact with the company, try to follow their warranty procedure. If you'...
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