Here's a great set of wheels for your Gravel Bike. These are Genuine 700c DTS G540 DB rims with 32 spokes laced to Shimao M4050 Splined rotor hubs and 700 x 450 Mxs Rambler Tires. Tires and Presta Valve Tubes are already installed!. Spaced for 135mm rear / 100mm front quick release axles. These also come with 160mm splined rotors. These are brand new, never used. Here are the detailed specs for these grx135/100qr700dsc50 Wheels

Size: 700c X 28MM od rims
Rim Material: Aluminum
Type: Double Wall
Finish (Color): Black
Braking Surface: Splined Rotor - Disc Brake Only
Valve Hole: Presta
Spoke Material/Type: Stainless Steel 14g
Spoke Count: Front: 32 Rear: 32
Lacing: 3 cross
Nipple: Brass CP Finish
Compatibility: 8,9,10,11 speed cassettes
Hub Material: Forged Aluminum
Hub Finish: Black
Hubs: Precision Ball Bearing Shm M4050
Axle Material: Steel
Axle Type: standard quick release Axle
Hub Spacing: 135mm Rear - 100mm front
Tires: Mxs. Rambler 700c x 50 50 psi / 120TPI / EXO TR This listing is for a pair of wheels with tires, tubes, skewers, and 160mm splined rotors.