For light-use cross-country or heavy-use gravel we use the Stan's Crest MK4 Bitex 29in Wheel front and rear to get us through the chunk. Gravel bikes today are coming in with full-suspension, hydraulic brakes, and big tire clearances and we needed a wheelset to match. The Crest MK4 is a lightweight aluminum rim designed for 40mm - 2. 3in tires and keeps us rolling through gnarly gravel chunks.