Revel R+ Complete Gravel Bike, Sram Force XPLR Build, Raw TitaniumTITANIUM GRAVEL MAGIC The Revel R+ is a modern take on traditional titanium, built to make every mixed surface ride feel like an excuse to keep going. With clearance for up to 700 x 50c tires (or 27. 5 x 2. 1) and modern gravel geometry, its designed to be insanely comfortable on rough roads and chunky two track, while still feeling far faster than a metal bike has any right to. The frame uses cold formed, shaped titanium tubing paired with a Revel UD