This just occured to me: I've been searching around for the "perfect" ss crankset to use on my single speed cyclocross build, but I don' think anything out there will work properly.
- IRO Rob Roy (I want to use it spaced at 130mm)
- Phil Wood low flange track hubs + bmx freewheel (single fixed)
- I want to go external bearings, hollow axle for the crankset
Anything out there that's a dedicated ss/fg crankset like this seems to be designed for either mountain use (50/52mm chainline) or has too large a bcd (I'll be running a chainring in the 30s for racing). It seems to me that I'll need to run a compact double (inner ring) if this is going to work. That doesn't bother me because hopefully even with a chain guard it'll still end up being lighter than the equivalent Raceface/Truvativ offering/etc.
I don't know about the measurements, but the compact double with no FD is pretty standard for CX racers. You don't need a chain guard (if you mean bash guard), because the big ring does it for you. If you mean chain guard like the thing that keeps the chain on line hanging off the seat tube, then I don't know what to tell you.
You won't need a chainguard (like a typical single ring cross set up if that is what you are talking about) if you are able to get your chain tension right. You do have track ends or eno type hub right?
Don't worry about the chainguard, it's essentially just to keep things looking clean. I'd love to be able to run the ring on the outside of the spider but I have a personal hatred for rings on the inside.
The bike's going to be used for everything from commuting to training to serving as a single speed class/pit bike for racing cx this fall.
jfmckenna, I'd like to do this w/out going square taper.
legalize_it, I'd like to go w/ the Phil track hubs because I can get them single fixed, unlike their mtb hubs. With an axle swap I can move this wheelset over to whatever silly fg bike I build up a year from now if I like.
Dutret, clearance as in going over things on xc trails, not chainstay.