Just wide enough, just light enough. At 30mm internal rim width the M 1700 SPLINE 30 works for tires ranging from slightly wide to quite wide, allowing it to attack the hardest of terrains. But with a high-end build, butted spokes, patented aluminum Pro Lock nipples and the benchmark Ratchet System hubs, it still comes in at a low weight. Low weight means it's very reactive to rider input. Reactive means fun, and fun is why we are doing this, right?.