The Midnight Special excels on rough, potholed roads and long stretches of gravel. Its 650b road-plus tires are designed to smooth out road imperfections and absorb bumps, providing a comfortable ride.

Ideal for adventures where you might switch from pavement to gravel and back again, the Midnight Special is built for versatility and comfort. 

Features:

• Higher Volume Tires: These allow for better pressure adjustment across different surfaces and offer a wider contact patch for improved traction.
• Modern Road Standards: It comes with flat-mount disc brakes, 12mm front and rear thru-axles, and a 44mm head tube for enhanced performance.
• Tire Clearance: It can fit 650b x 60mm or 700c x 42mm tires without fenders, and up to 650b x 50mm or 700c x 38mm with fenders. 

Specification:

• Frame: 100% Surly proprietary 4130 CroMoly, double butted, ED coated
• Fork: 4130 CroMoly, ED coated, TIG-welded
• Headset: Gusset S2
• Handlebar: Surly Sunrise
• Stem: Genetic SLR
• Bar Tape: Genetic Classic Cork Tape
• Seatpost: Genetic
• Saddle: Genetic STV
• Front Derailleur: N/A
• Rear Derailleur: SRAM Rival 1x long cage
• Shifters: SRAM Apex Hydro 1x
• Crankset: SRAM Rival 1x 42T
• Cassette: SRAM PG1130 11s 11-42
• Chain: SRAM PC 1110 11s
• Bottom Bracket: SRAM GXP
  
• Brakes: SRAM Apex Hydro
• Wheels: Halo Vapour MT, 12mm thru-axle
• Tyres: Schwalbe G-One Speed 650x50c

Complete bike spec subject to change.

You can find the Surly bike sizing here for reference.