Has anyone experienced poor traction and side sliding using these Kevlar type tyres. My front wheel has slid sideways and caused me to come of the bike on three occasions now since I had them fitted. Would be grateful for your response. Thanks Tim
I'm guessing it's not the Kevlar belt that's causing the issue so much as the correlation between a Kevlar belt and an overall stiff tire. One of the most important qualities of a tire is its suppleness: how easily it deforms and contours itself to the uneven surface of the road. By deforming easily, you maximize surface area and increase grip. By adding lots of layers of puncture protection, some tires become rigid and don't handle sideways load all that well.
I don't necessarily recommend different tires: only you can determine whether the added puncture protection is worth taking more gradual turns. Push down hard on the outside pedal while cornering, and avoid taking turns over manhole covers, raised paint, train tracks, or any other type of road adornment, because they all can be pretty slick.
Unless you are slipping due to an abrupt change in road conditions (hitting a frozen puddle, gully, tram rail, etc.) when you are slipping with your front wheel, that's a) a sure sign that your front tire is a bad brand, and b) a significant security problem.
On a): Usually, you have a much higher load on your rear wheel, so that is the first to slip. If you slip with the front wheel first, it indicates that it has significantly lower grip than the rear wheel. The grip is determined by the rubber mixture that is in contact with the road, and that depends entirely on the brand.
On b): Slipping with the front wheel means you instantly fall with no hope of recovery. This is worse than with the rear wheel, where you may still be able to catch yourself when it starts slipping due to ground conditions. In either case, slipping is something that is to be avoided at all costs, so you want the best grip tires you can get.
Kevlar or not, get yourself a tire you can trust. My experience tells me, that there are huge differences in tire grip, find a brand with good grip.