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7 spd ultegra hub to 8 (or 9) spd?(5 posts)

7 spd ultegra hub to 8 (or 9) spd?shawndoggy
May 24, 2001 4:14 PM
What does it take to upgrade an old (but ohhh sooooo smooooooth) ultegra seven speed cassette rear hub to take an 8 or 9 speed cassette? Is it worth my while? I have an old wheelset that I don't use and was thinking about using the hubs as the starting point for building up a set of new wheels. Since it's my first wheel build I don't want to buy a bunch of really expensive stuff it doesn't come out perfectly.
re: 7 spd ultegra hub to 8 (or 9) spd?LC
May 24, 2001 4:29 PM
You would need a new hub since the 8/9 speed cassette is wider. It is usually cheaper to buy a new built up wheel then to try to piece a new one together. All the parts will add up to more then the price of a whole wheel.
Skip Itgrz mnky
May 24, 2001 4:43 PM
7 speed is only really useful for 7 speed format. You'll find that some have tinkered with it and have gotten it to work, just not very well.

You would be better off getting some decent, but inexpensive new hubs such as Ultegra (8 speed on sale works the same as new 9 speed at full pop retail) and building from this with new rims and spokes. Wheel building isn't that hard and you'd surprised at how easy it can be if you stick to standard conventions. You can loosen or tear it down and do it over and over again for practice. Try to learn with some old used odd ball stuff and you're asking for a headache.

You won't really save money (unless you're unemployed), but it's a good skill to have.

Remember, nothing is perfect.
Skip ItJamm
May 25, 2001 10:55 PM
What the h are you rambling about?
you will need to replace the freehub partBreck
May 25, 2001 11:51 PM
the 7-speed freehub is not as long(wide maybe the correct xyz axis term) as the newer 8-speeds with the extra gear. though the spacers are the same 3mm thickness, the 8-speed cogs are slightly thinner and the overall length is longer(or wider whichever the terminology).

you will need to buy a new freehub, the part the cassette slips onto. you will need a large hex wrench(don't remember but on the order of 8-10mm). take off the old freehub, install the new. you could use your old un-pinned 7-speed freewheels(cogs) and 3mm spacers to reestablish an eight speed except for the one problem that is the 8-speed freewheels are a tad thinner than the older 7-speed and so shifting is not smooth from bottom to top. so a new cassette is in order. there used to be some early cassettes that had the pinned freewheels but mostly only see fixed yoke spyders now a days. the 9-speed i have no experience with.

you will need to re-dish the wheel because of the wider 8/9-speed hub geometry.

spent money vs experience gained ...my take.
there is some balance here but working on more difficult bike repair/build problems bring it's own satisfaction and hard to put a value on it. so the idea of money saved by going route a)rebuild or b)buy new, can be a personal choice based on your mind set Vs another persons.

hope i read your question correctly as maybe you ment to buy a new 8-speed hub altogether. this of course is the easier solution.

cheers