Usually modern bar consists of one or two lines, which carries the load and are connected with chicken loop to your harness. These lines usually goes thru bar stopper, which limits bar travel, locking the power of the kite, allows you "hands free" or "resting" of your arms, which can get tired over the time. Due to dynamic powering with the bar the ropes get all the wear. Due of the excessive wear the lines get thinner due to broken fabric threads and this can get really dangerous over the time. Can lead to snapping of the line and to serious injury.
Luckily there is one easy to do trick to prevent this wearing by a simple PU hollow tube which is not too soft, like you can see on the latest bars. PU is tough and resistant, and will prevent a direct contact of softer line with the abrasive bar or stopper, meaning long lasting and safe ride.
So, how you would upgrade your bar to a more safer one? If you had some skills and tools it is actually quite easy and it will take you just a couple of hours. The tricky part in the whole conversion is adding of the tube over the line. Usually bar stopper is one of the critical part, because inner holes are too thin. Here you would have to drill a bit larger hole to squize thru the PU tube too or you can actually use thinner line. Normal depower lines used on kites are 5-6mm thick, while, if it's covered, 4mm one is more than enough. Our extension lines are, for instance, 3mm thick and has 950kg of breaking load. The load is also divided into two lines in case if you have stopper on them. In case of single line the story is a bit different, here we would suggest to use at least 4.4mm or 4.6mm depower line, like we used on F-One bar retrofit on pictures below.
What else you should also consider is how the line connects chicken loop? Some of them are quite complicated, but on some can be done. Why is this important? Because it is advisable that the end of the PU cover tube is not exposed. This can be also done with the usage of the stopper balls like on our pictures. It is good to limit the moving the tube over the line, since you usually cant secure it well enough. Here again stopper balls with side lock screw will come handy since the last thing you want is to learn hand sewing...
Some of depower lines are actually spliced on one or both ends. What is rope splicing actually and why it is a good thing in kiting? This is a simple technique of inserting the end of the line back into itself, usually leaving a small loop on the end, so that you can use it and connect it to something. The goody is that it is one of the cleanest and safest loop, with minimum strength loss of the line.
You will need some special tools for line splicing and some skills in proper sewing if you want just to make simple eye splice loop like originally on the kites. The good alternative is to make Brummel lock splice, which does not need any sewing and it is really useful when you do not have access to the sewing machine or pro service or you just need to save your session.
Changing depower rope and PU tube on F-One bar.
Finished setup. PU tube is not sewed but secured with stopper balls with side screw.
Important! If you don't know what you are doing or how to properly use tools or you don't have the skill to change/tune/adjust/upgrade your gear it is just better to buy original spare part or go to the pro and ask to do it for you. If you answered positively to one of the points then the juice is not worth the squeeze -> go to the PRO!!!