7.9 is close enough to count

Exactly.

If I buy a 36t (originally 44t) sprocket for the front, can I replace my driver without having to buy a new hub and relace my rims?

If you have a 44t chainring, you probably have a 16t freewheel on the back, not a driver. In which case, the smallest freewheel you're likely to be able to get to fit your current hub would be a 15t, which would be too large to use with a 36t sprocket (you'll be spinning your legs like crazy and not getting anywhere).

For a 36t chainring, you'll want a 13t cog or driver on the back, which will necessitate a hub upgrade. Freewheels don't generally get this small, particularly freewheels that will fit where a 16t freewheel formerly attached.

Note that upgrading a hub requires either a whole new wheel, or unlacing and rebuilding your current one.

to get down to that size you need a new hub. and you might as well just get a cassette and go smaller than 36-13.

If he has a F/F hub, he could run a 33/12.

Thanks. Because of this, I was looking at other bikes that might be available on craigslist. How is a 04 Fit S2 bike for $150?

the S2? i remember that being a fairly decent bike...

So it's a good deal I take it?

might as well go for it

I got the bike it has a 25t and a 10t driver. How much would a difference would that make from the 25/9 ratio that minichamp recommended on the first page?

not a huuuuuuuge difference, but im sure you'll still notice it

You'll most likely be spinning like crazy, but you might get used to it. If not, get a 28t sprocket.

Would it be easier/cheaper to get a 10t driver or is that somehow connected to the hub?

It's a 1-piece driver, so you would have to get a whole new driver. Just get a new 28t sprocket for like $40 and you'll be good.

So the Hazard Lite Cassette is directly connected to my 10t driver? That means that to change it to a 9t, I would need a whole new hub (a re-lace wheels)? wah?!

No, the driver is just held in place with a single cone nut. take that nut off and the driver will just pull right out, and you could swap it for a 9 tooth.

i think you just read mini's post a little wrong...but like fuzzy said, just pull it off and swap it out. just make sure that it has the same number of pawls so that it engages better.

and as a personal opinion, i'd go with a new sprocket because a driver will be more expensive than a sprocket

Driver is only like 40 bucks. 3 pawls is the best engagement.

So pretty much, a driver and sprocket cost the same. I would just go with the new driver to tell you the truth.

sorry, but i am going to post some links to another forum...

don't worry, this confuses a LOT of people.

when you run a tiny sprocket, you're supposed to use a proportionately tiny driver as well. if you have a 13t freewheel, you should have a 36t sprocket to keep a "normal" ratio. if you want to go smaller, you will probably have to get a different kind of hub. check out the articles/threads below.

converting to micro-gear ratio

guide: gear ratios

guide: hubs and how they work

Thanks for the link!

mines stock and 25

Its also made of waterpipe.

you coulda done a tooooooon better