The Speedmaster is not a copy, it's a refinement. Two front
discs are better than one. The rest is subjective. Personally, I prefer non-spoked wheels, they are easier to clean and you never have to tighten/true them up. The rear wheel of the TBA is probably lighter than the TBS's
near-solid one, the fronts are probably even. I definitely
prefer the blacked-out look, though. To each his own.
