New answers tagged

3

The spokes support the wheel under compressive load. The rim in itself is relatively weak in compression. Of course, losing a spoke means that the remaining spokes have to carry increased load and you risk breaking more spokes or buckling the rim beyond repair. (Note: minor buckles can be removed through "truing" the wheel, a process of adjusting spoke ...


0

You should get to the bike shop and they get you a chain the size you need. If you don't want to go with you bike, take your older chain. For sure it is under 30$. I paid less than 20 for a SRAM chain not long ago.


6

If you have friction shifters, they don't really care what kind of rear derailleur you put on them -- just that they can pull enough cable to move the rear derailleur from the highest gear to the lowest gear. If you're not concerned with having a matching vintage set, I'd suggest pop picking up something like a Shimano Altus or Acera rear derailleur. ...


6

Can I use a 9 speed shifter with a 7 speed drivetrain, with good shifting and without needing complex adaptations? Kinda, maybe, sort of... its complicated You could use a Shimano 7 speed derailleur with a 9 speed shifter, if you also used a wheel with a 9 speed cog. The 7 and 9 speed Shimano derailleurs use the same derailleur ratio of 1.7 (amount ...


2

It won't work. On a 7-speed cassette, the cogs are 5.0 mm apart (center-to-center). On 9-speed, it's 4.34 mm. This means that if you adjust the derailleur so it's in the correct position on the 1st cog, then by the time it gets to the 7th cog, it'll be 4.62 mm off from where it needs to be.


4

You can try it, but don't expect perfection. The width of a 7-speed chain is greater than the width of a 9-speed chain, therefore the component sizes, and the distance you need to shift, are different, even if only slightly. Whether this is enough to spoil your ride, only you can judge. A shop or a manufacturer might be somewhat more definite in their ...


0

Do you just need a brake lever? Then don't fit a shifting cable and you're sorted. The brake action and the gear change are different mechanisms inside. You could even remove the gear changing gubbins for weight. How do you change gear? Is the bike now a fixed speed by accident? Refurbishing a brifter's shifting mech is not hard.


2

You can use the brake lever without the shift portion just by disconnecting the shift cable. Then, you can attach a bar end shifter or a downtube shifter or similar to shift instead. You won't be able to replace just the shifter portion of the brifter (without probably canabalizing another brifter anyway and actually manage to put the old one together). ...


0

I would say sell and buy a full bike (even second hand). Components on bike are chosen to work together with the frame geometry. Parts are way more expensive alone than as part of a bike. You could change transmission, seat post, and maybe handle bar. But don't mess with frame and suspension unless you know what you do. As a guideline you can choose ...


5

The ST EF-51's have a little switch in the back of them to switch between V-brake and cantilever. I found them too low quality to use reliably though. You have several options: Go to 8 speed or more and pick up some Alivio shifters. This is what I did on a 7 speed bike, and this is what I'd recommend. Microshift makes some 7 speed shifters that are ...



Top 50 recent answers are included