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0

This is a freewheel, not a cassette, and thus it has no lockring. It does have the ability for a skilled and careful mechanic to disassemble and replace bearings, to rebuild it. However, it is cheaper to simply replace it.


1

Smoother steps between the gears is a nice to have - but if the gearing is not suitable to you - it becomes irrelevant. It's mentioned in the answer above "rear derailleur has capacity". This refers to the the length of the cage on the rear derrailleur. They come in three varieties (with Shimano anyway) - short, medium and long. Each length has a specified ...


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If you imagine a cassette, will have a bunch of sprockets on it. The current 105 range (which came out last year) will have 11 sprockets, the earlier 105 had 10 sprockets. The notation you've noticed simply means that for one of these cassettes, the smallest sprocket has 11 teeth, the largest has 32 teeth. And the second cassette has smallest sprocket 12 ...


2

Numbers denote number of teeth on smallest cog i.e. 11-32 has smallest cog with 11 teeth, and largest with 32 teeth. 11-32 gives you larger range of transmission ratios while 12-25 gives you smoother steps between the speeds. When calculating which one to choose also take into account number of teeth you have in front, and the kind of terrain you would ...


0

Apart from more obvious issues like mal adjusted front derrailleur where the chain would rub against it at certain positions (this should not occur when you are using the middle rear cog).... I once encountered a sandy gritty feel on the pedals on a bike with new but very cheap cassette and chain. after ascertaining it was not pedals (rotated the pedals ...


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6 speed spacing is 126mm wide measured from the outside of the locknuts. It's easiest to measure with calipers. However, you can add or remove spacers and possibly install a longer or shorter axle to get that spacing. I bought Campagnolo hubs "back in the day" that came as 6 speed hubs and eventually ran them with 8 speed freewheels, using longer axles ...



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