Most of KCNC's kit is feathery weight-weenie-type stuff, but this set of extensions feels solid enough, and isn't going to break the bank either. And it's still fairly light to boot.
The RBS Pro system consists of a bullhorn bar and two TT extensions. The bullhorns are oversized and keep the wide profile for much of their flat length to give you more options when it comes to fitting the extenstions, which are an over/under design with a stack of spacers to get your height correct. The extensions are very adjustable, so it's pretty easy to get yourself set up just so, and once everything's tightened up they stay put and don't shift even when you're really going for it.
Weight-wise, the whole system tips the scales at not much over 700g, which is pretty decent considering that at £104.99 they're at the budget end of the aero scale. If you're setting up a bike for time trialling or triathlon and you're going the whole hog with bar-end shifters (or fixed...) then this kit is a pretty modest investment, really, and it does the job just fine. KCNC also do a drop bar set for the same money if you want to stick with your STIs.
Not flashy like some of KCNC's kit but well made with plenty of adjustment options and a modest price tag.
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road.cc test report
Make and model: KCNC RBS Pro Aero bars
Size tested: n/a
Tell us what the product is for, and who it's aimed at. What do the manufacturers say about it? How does that compare to your own feelings about it?
Complete fully adjustable set comprising Kcnc's tri bar specific wing bars with extended central bulge to allow lateral adjustment of extensions, and 6061 Al alloy aero tri extensions.
# 6061 T6 Al alloy bars 420mm
# 6061 T6 Al alloy aero extensions
# 6061 T6 fully cnc'd brackets
# 100mm extension adjustment
# 17° arm rest angle adjustment
# Five levels of arm rest height adjustment
# 31.8mm stem clamp only
# 420mm width, centre-centre
# Black anodized
# Weight: 700g
# Designed for TT and Triathlon
Did you enjoy using the product? Yes, for the money it's a good set
Would you consider buying the product? Yes
Would you recommend the product to a friend? Yes
About the tester
Age: 37 Height: 190cm Weight: 96kg
I usually ride: whatever I\\\'m testing... My best bike is: Genesis Equilibrium with Ultegra 6700
I've been riding for: 10-20 years I ride: Every day I would class myself as: Experienced
I regularly do the following types of riding: time trialling, cyclo cross, commuting, sportives, general fitness riding, fixed/singlespeed, mtb, Mountain Bike Bog Snorkelling, track
Dave is a founding father of road.cc, having previously worked on Cycling Plus and What Mountain Bike magazines back in the day. He also writes about e-bikes for our sister publication ebiketips. He's won three mountain bike bog snorkelling World Championships, and races at the back of the third cats.