Your three contact points with the bike - hands, feet and bum - are crucial to comfort and control. Good quality bar grips make a real difference. If you suffer from numb hands, try the new generation of ergonomically designed models. You'll probably have to cut your old ones off - be careful not to slash the bar inside. Fitting new ones is easier if you use a slippery substance that dries afterwards. We think hair spray is the best but, if you're too embarrassed to buy that in the chemists, try puncture repair adhesive.