USA Cycling National Championships Singlespeed Rules
UCI rules will be applied: exception that the 33mm tire width rule will not be enforced. Riders must have no larger than 35mm tire & compete on CX bike. No flat bars. No spiked or studded tires. Riders must have a free wheel, one cog, and drop bars.
|Spacers and cog on Shimano freehub body|
There are a number of much better mechanical options for converting a bike to single speed, at least in my opinion, that involve using a chain tensioning device. You don't have to purchase a single speed specific frameset either. Inside each and every geared bike is a single speed just waiting to emerge. All you have to do is remove some of the geary clutter.
|Using brake cable to fix the rear derailleur in place|
|Extra long limit screws to fix derailleur in place|
You could also use an eccentric rear hub like the White Industries model that a number of prominent local SSCX racers are employing. I've not had any experience with these hubs but they will allow you to convert a normal, vertical rear dropout frame into a dedicated single speed without a chain tensioning device, albeit at the expense of a new wheel build.
|EBB30 eccentric adapter provides throw for chain tension|
These frames tend to be some of the most high tech and lightest on the market if that is your thing but also, have become the norm. You can now buy eccentric bottom brackets that work with BB30 or PF30 bottom bracket shells and a smaller 24 or 22mm spindle crankset to provide the fore and aft movement required to properly tension the chain. This is the setup that Cathy and I have been using for over four years now. From what we have seen it works great, though it is a bigger expense than some of the other methods. We have dedicated, full time SSCX bikes though which are also the bikes that we do 95% of our CX specific training on. That means they do not sit idle other than on race day. In fact, they see much more use than our dedicated geared race bikes.
|Extra protection for the chain|
If you have any questions about anything I have written or about any other techniques or best accepted practices for SSCX, shoot me a message. I'm happy to help spread the word of one geared conversion and single speed love. If you are local and need help, I'm easily bribed with beer and readily available to help with your parts spec options or conversion.
|Clean, quiet, simple and reliable|
And yes, the SSCX shall indeed inherit the Earth. It will, just you wait and see.