We have some VERY muddy and technical cross course up here in BC, Canada. I wanted to build a “naked” bike that was as simple and clean as possible.
Geometry: Full race cross geometry. 417mm chainstay length. Best part is the ability to run the EBB in a lower Portland style height or higher euro position. Curved seatube for extra clearance and shorter stays.
Partial seatmast: higher offset collar for short, standard seat-tube. Allows for simple, traditional seat adjustment but helps keep the crud out of the seat-tube.
Gates Belt: I find most guys like to run just high of 2:1 around here so this is set up with a 50:24 drive and the ability to go up to a 22 or down to a 26 with a 113 Belt. I can also go to a 28 or even 30 with a 115 belt. Centre track of course. This was amazing yesterday at Cross on the Rock (Crosstoberfest). We had a really tight course with lot’s of corners to sprint out of. A single speed already has a really positive feel but gates system is even more direct. The carbon drive is so stiff, it actually makes a single speed chain feel spongy.
Frame splitting: When people first look at this frame, and others I have done like it, they assume I have welded the frame shut with the belt in place. This makes me smile, because it means they can’t see the split. My solution is simple, light and very clean. The end of the seat-stay is stepped and threaded. A matching stub on my own naked, boomerang dropouts accepts a hidden 6mm bolt that hold the system together.
Frame material: This is a mix of True-temper Platinum, S3 and Nova brand rear stays. Each bike is custom tailored to each rider so this mix can vary from frame to frame.
BB Shell: This is actually a PF30 shell which accepts an FSA EBB. This means you could actually run a bb30 crank and rear derailleur with NO extra bits.
44mm headtube: This allows any possible steerer combo. With a taper 1 1/2″ to 1 1 1/8″ being the current obvious choice.
Disc brakes: Frame is routed to run either mechanical or hydraulic lines.
Practicality: It is all fine to have a “race only” cross bike, but I think this is a bit silly. A couple of extra holes in the frame for fenders and water bottles and suddenly, you have a bike that can do so much more with no compromise to it’s competition worthiness. Fender mounts don’t mean your not a real x racer, they simply mean you are willing to ride for hours in horrible weather while everyone else gets soft. In BC, fenders mean your a bad-ass.
Tubeless: This can be a problem on cross bikes. Usually because the road rims used are too narrow and channels are too deep. By using a tubeless ready light weight and most importantly, wider 29er rim, I have gone a long way to not only eliminating the dreaded “burp”.
Parts kit: Nothing overly tricked out here. Just good stuff where it actually counts. Wider Velocity blunt SL rims, Sapim X-ray spokes, Chris King SS rear hub, Gates belt drive, Avid BB7s etc.
Weight is 17.75 lbs. Could easily drop some weight with some tricky parts, but once your in the “reasonably light range” spending zillions of bucks to drop a few grams is just silly in my mind. Anybody weighed there shoes recently?
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