How to review a seat collar..
KCNC has for a while now been well known to provide affordable, light weight and capable bike components. The Road Pro (SC9) collar is no different. The collar is of a barrel nut, non-offset single gap, and solid one piece design.
Because itâ€™s a barrel nut collar the clamping bolt threads into a replaceable barrel nut instead of directly into the collar itself. The main advantage to this is of course that in the event of the bolt being over tightened resulting in stripped threads, the collar itself will not be rendered useless. Simply replacing the barrel nut will be enough. Whether or not replacement barrel nuts are readily available is yet to be seen.
The non-offset gap design has been accused of making bikes prone to seat post slippage. That said, due to old crash damage the bike on which the collar has been tested is well known to being sensitive to slippery posts, and so far the carbon post has not slipped a single mm in the aluminum frame. In short, the collar works.
The finish and intricate machining of the collar is exquisite. The edges have all been rounded off nicely, and the overall appearance of the collar is lightweight and detailed yet still beefy and solid. With the collar being anodized flat black bearing white laser engravings the end result is one good looking piece of kit.
There is a bit of tuning potential but due to the detailed machining the risk of compromising the integrity of the collar is high. Yes, it would be possible to remove a few grams by converting it to a two ring design like the M2 and Omni Race collars but as the collar already comes in at a claimed weight of 12gr (14.2gr tested) there is little to be gained. Furthermore, the main advantage of the collar's one piece solid design is that the clamping force is spread across a bigger surface area making it suitable for carbon frames or alloy frames with delicate paint jobs.
Scandium and titanium hardware.
Comes in odd sizes (30.7mm especially).
Heavier than claimed (albeit just 2gr).
Only comes with gold anodized barrel nut (and sand paper is not included if silver is preferred).
Verdict: Not the absolute lightest but a low price tag makes it a nobrainer.