Velocity Synergy (OC rear)

Thanks.

I may give serious consideration to a 650A build too if a smaller wheel ends up being the course of action. The price of rims and tires in 650B and I just can't justify, from a technical standpoint, the difference. Sure, 650B has a few more tire choices and there's a smaller market which inflates the price but sheesh...

Well, about the time I pushed the button on the above post the frameset arrived.

With Conti Grand Prix 700x24C tires mounted on Ksyrium Elites a quick and dirty measuring shows:

BB height: 265mm
BB drop (from geo chart): 73mm
Clearance at 320mm on stays and fork: all about 40mm

I don't think this is a candidate for 650B or 650A conversion

I don't have any 25 or 28mm tires handy, I'll have to grab a couple cheapies and see what I get.

Be aware that the nominal size on the sidewall and the actual size of a tire can vary rather a lot from brand to brand and model to model. I've had tires marked 700-32 and 700-28 that both measured 26 mm as installed on standard road rims and their roll-out for cyclometer calibration were both consistant with a true 26 mm. So the fact that one model "700-28" tire fits your frame and fork doesn't mean a different model will.

Keith, seems to me you should come up with kind of a target spec for your fork. If you can identify what are the characteristics that would be best for you, you can understand what compromises you'll have to tolerate when you see what goods are available.

Questions:
Desired rake and trail?
Wheel/tire size, especially tire width and wheel radius with inflated tire?
Brake type?
Height of headset off the ground when finally installed - do you need the frame to run level?
Fenders?
Front loading?
Lights/mounts/braze-ons?
Material goals or contraints
Fork crown appearance
Necessary clearance between fork blades
Necessary clearance between tire and the underside of the fork crown at closest point.

This may sound unconfortably like engineering, but actually it is engineering.

I bet I'm missing something ...