I was on ebay and a seller send putting water in wheels is tested and improves climbing a lot. Is this true. Also how should foam be cut to make wheels softer.
LOL, water in the wheels... that's a first!! As for foams, you can cut them into a star pattern and/or cut v groove in the foam around the circumference. That will allow it to conform easier to terrain, as well as let your tires have a little more room to mold to a rock if you have a really stiff foam. I'm a big advocate of memory foams, when it's warm out anyway. I am currently running the NWTT Hybrid Reach foams in a set of Panther cougars and couldn't be happier
While sound in theory, it won't work quite so well on RC Crawlers. Most, if not all, either put holes in their tires, or rims from the start. They do this to allow the tires to vent, so as they conform to surfaces better. With an airtight wheel, you are prone to bouncing on the rocks, an undesirable effect in this sport. Another downfall of that I can see is if you caught your tire on a knuckle and it tore. I've done it plenty of times, as have many others. The second that happens, all the water that was in your tire, would not help much in that situation lol. I know this was brought up as an alternative to foams in the tires, so I thought I'd also throw this out there. Tire foams and water do not mix. Some say it eats away at the foams, which I can't really see happening. What I have seen though, is it takes a wet foam FOREVER to dry out.