emeyers10

I bought this custom single-speed off of a guy last August for campus and city riding. I stuck to my Schwinn Sprint for awhile, but I made the mistake of leaving that at home in the family's garage and was stolen.
Apparently he got it off of NYCBikes, but I'm not positive.

I'm looking into getting a new chainring/cog set up, but the crankset is a 4-bolt Cyclone Precision, whom I've never heard of or seen anywhere else. I googled it and apparently, if I'm wanting to get a new chainring, mine as well just get a new crank. I could shell out dough for a higher 4-bolt ring, but I figure, what the hey. Let's look for a crankset.

Here's where things get confusing for me.
How do I know what cranks are compatible with my set up? If I get a new bottom bracket, then can I get a crank compatible with that? Or do I pretty much have to stick with whatever is compatible with the bracket I have? HELP.

Now that my baby is long gone, I need to really do some work on this thing. I already have some bullhorn's and a new brake lever coming in, and I'm in need of a new chain, too. Once the specs are fixed up, I'm going to paint it. I really hate the chrome look and want to make it unique but classy. So that'll probably take me forever to decide on

Here are some pictures for a better idea (ignore the dirty garage; I'm at home and my step-dad is a slob and they're cleaning out the house to move soon):


ahhhh rust


ewww dirty white griptape
I do love my commuter slicks, though I'll probably get some thinner tires in the future
I have the cages off the pedals currently because I let a friend borrow it and she could not for the life of her get the gist of it

Thanks a ton.
And don't be too harsh on me if I'm an idiot.
Keep in mind I'm learning. And there aren't a lot of folks around here who know about single-speed/fixed gear.

vobopl

what you need is BCD (bolt circle diameter) measure of your crank. Most likely is is 104mm but check Sheldon. You can easily find chainrings which would fit, knowing crank's BCD.

jdms mvp

i'm no giant myself, but how tall are you? judging by that seat post and compact geometry, u should be riding * <50cm

emeyers10

jdms mvp: again, i haven't ridden it since i let a friend borrow it. i'm 5'7" and my inseam is about 33inches so i normally have the seatpost higher. i think the girl who was riding it is like....5'2" haha

jdms mvp

hahaha no worries, i just saw the pic and was like...dang!

emeyers10

vobopl: yea, it's 104. thanks for mentioning the BCD, i was kind of confused about that.

emeyers10

It's pretty funny when my short female friends ride it, because their reach is smaller and I have to drop the seatpost down. I'm female, too, but I've got long arms and legs so I have a Ritchey stem with 120 reach.

After researching, it seems that it's basically a setup for a ss mtb.
Is this still usable if I want to do ss road racing?
I can find a chainring in the 104mm/4-bolt size, but if it's a bad idea, should I look into investing in a track crankset???

Aeroplane

odds are the BB for those cranks is a standard JIS square-taper BB. Most square taper cranks (except for campy, miche, and some sugino depending on who you ask) will work with it.

carbonjockey

just pick up your basic square taper bb and then find a crank that works, most ss/fg cranks are square taper

emeyers10

thanks a ton folks; was a great help!

give me a month or two (i'm working full time over the summer and have to fit buying parts and fixing it up in my schedule) and i'll hopefully have an updated single-speed-sex-machine

jimisnowhere

Also fix your front quick release before it kills you.

Live2Die

Truth!!! wrong side and not closed = death on wheel (since your front one will be long gone by the time death occurs)

emeyers10

i think i just put it on like that when i pulled it from the car.
i fixed it before i rode it.

i've actually decided to build up a fixie with a bianchi frame a bike co-op is going to sell to me for cheap, instead of fixing this. but the info on the cranks and bbs helped out for future reference.

mander

Good luck with your new conversion, and remember to set it up very carefully before taking any pictures for bikeforums.