Surly Midnight Special Frameset 2025
2025 Road
Estimate price |
899$
Bike details
Overview
Key information split into simple groups.
Frame summary
-
-
Frame Steel -
Suspension Rigid -
Brakes Mechanical Disc
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
Surly Midnight Special 4130 Chromoly, Natch tubing, double-butted main triangle, TIG welded, ED coated
Suspension Fork
Surly Midnight Special 4130 Chromoly, Natch tubing, TIG welded, brazed lugs, ED coated
Drivetrain
Bottom Bracket
68mm threaded (1.37" x 24TPI)
Wheels
Tires
650b x 50mm
Brakes
Brakes
Disc - Flat Mount (160mm max rotor) – Use Brake Manufacturer's Front Flat Mount Adapter and Supplied Bolts
Seat
Seatpost
Ø27.2mm
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | 40cm | 46cm | 50cm | 54cm | 56cm | 58cm | 60cm | 64cm |
|---|---|---|---|---|---|---|---|---|
| Stack Reach Ratio | 1.463 mm | 1.47 mm | 1.435 mm | 1.44 mm | 1.476 mm | 1.49 mm | 1.516 mm | 1.515 mm |
| Front Center | 578 mm | 579 mm | 591 mm | 602 mm | 596 mm | 610 mm | 619 mm | 633 mm |
| Rake | 50 mm | 50 mm | 50 mm | 50 mm | 40 mm | 40 mm | 40 mm | 40 mm |
| Trail | 62 mm | 58 mm | 55 mm | 52 mm | 59 mm | 59 mm | 55 mm | 53 mm |
| Stack | 531 mm | 538 mm | 544 mm | 560 mm | 580 mm | 599 mm | 620 mm | 641 mm |
| Reach | 363 mm | 366 mm | 379 mm | 389 mm | 393 mm | 402 mm | 409 mm | 423 mm |
| Top Tube Length | 500 mm | 520 mm | 540 mm | 555 mm | 570 mm | 585 mm | 605 mm | 625 mm |
| Seat Tube Angle | 75.5 ° | 74 ° | 73.5 ° | 73.5 ° | 73 ° | 73 ° | 72.5 ° | 72.5 ° |
| Seat Tube Length | 400 mm | 460 mm | 500 mm | 540 mm | 560 mm | 580 mm | 600 mm | 640 mm |
| Head Tube Angle | 71 ° | 71.5 ° | 72 ° | 72.5 ° | 73 ° | 73 ° | 73.5 ° | 74 ° |
| Head Tube Length | 95 mm | 100 mm | 110 mm | 125 mm | 140 mm | 160 mm | 180 mm | 200 mm |
| Chainstay Length | 425 mm | 425 mm | 425 mm | 425 mm | 425 mm | 425 mm | 425 mm | 425 mm |
| Wheelbase | 993 mm | 994 mm | 1007 mm | 1018 mm | 1012 mm | 1027 mm | 1036 mm | 1050 mm |
| Bottom Bracket Drop | 70 mm | 70 mm | 65 mm | 65 mm | 65 mm | 65 mm | 65 mm | 65 mm |
| Standover Height | 720 mm | 751 mm | 778 mm | 806 mm | 827 mm | 846 mm | 866 mm | 895 mm |
| Wheels | 650 | 650 | 650 | 650 | 650 | 650 | 650 | 650 |