Originally Posted by Kakaru

Hi,

So the tamiya TRF blue competition O-Rings (P3 size) are better than the clear O rings in terms of preventing oil leak and durability? From the description in RC Mart of this product, it requires additional shims (Tamiya #53586) for clearance. Is it really necessary to get the shims if I were to use this blue competition O rings instead of the clear O rings?

Thanks.