Grips and bar tape

Thickness determines comfort more than material: thicker ones dampen vibrations and relieve the palms, thinner ones give a better feel and suit smaller hands. Lock-on grips don't twist and you can replace them with a single Allen key; slip-on ones are cheaper but hold worse. Wrap the bar tape from the ends of the drop bars upwards with an overlap of roughly a third. Both are consumable parts — as soon as they start slipping with sweat, it's time for a replacement.