No question but that today's 20/24 spoked wheels are often just fine for folks our weight (220ish). Of course that assumes they are built well. My last two sets of wheels have been 20/24 and have gone thousands of miles without a single touch of a spoke wrench. Do check with the maker of the wheel for their recommendation for maximum weight. Some will flat out say they there is a weight limit and others will claim no limit on weight. Obviously they don't expect a 450lb person to be riding such wheels but my experience is that a good 20/24 can be fine for a big rider. I would have preferred a 24/28 but in looking for a good, reasonably priced tubeless wheel I found no 24/28 that I liked and ended up with a great deal on Bontrager wheels that I'm quite happy with. I probably have less than 2000mi on them but so far they remain perfectly true.