Surly Midnight Special Frameset (Metallic Lilac) (650b) (58cm)

Read Reviews
Write a Review
Surly Midnight Special Frameset (Metallic Lilac) (650b) (58cm)
Temporarily Unavailable
Expected Sep 29, 2023
Price: $799.00

Please Log in to receive a notification when this item arrives in stock.

Save In List
This item earns up to 799 VIP Reward Points Learn More

The Midnight Special is a road plus bike designed to provide comfort and speed on those all-day rides that extend well beyond fresh pavement. It excels on pot-holed, deteriorating pavement and the occasional long stretch of gravel. The Midnight Special’s 650b road plus tires eat up road chatter and absorb all the bumps in the road for a much more comfortable ride.


  • 100% Surly Chromoly frame, main triangle is double-butted; 1-1/8" threadless Chromoly fork
  • Rack, fender, and three sets of water bottle mounts
  • Downtube mounted shifter bosses (cable housing stops not included with frameset)
  • Flat-Mount disc brakes
  • 44mm head tube
  • Tire Clearance: 27.5 x 2.35" (w/o fenders), 700c x 42mm (w/o fenders), 650b x 50 (w/ fenders), 700c x 38mm (w/ fenders)


  • Frame Construction: 4130 Chromoly, Natch tubing, double-butted main triangle, TIG welded, ED coated
  • Fork Construction: 4130 Chromoly, Natch tubing, TIG welded, brazed lugs, ED coated
  • Rear Dropout Configuration: Vertical
  • Rear Hub Spacing: 12 x 142mm (Surly Axle Included), 10 x 135mm w/ Surly 10/12 Adapter Washers (Not Included)
  • Front Hub Spacing: 12 x 100mm (Surly Axle Included)
  • Rear Brake: Disc - Flat Mount (160mm Max Rotor) (25mm Thick Mount, 32mm Bolt Length)
  • Front Brake: Disc - Flat Mount (160mm Max Rotor) (Adapter Not Included)
  • Head Tube: 44mm
  • Steerer Tube: 28.6mm (1-1/8")
  • Crown Race: 30mm (1-1/8")
  • Stock Headset Upper (S.H.I.S.): ZS44/28.6 (Not Included)
  • Stock Headset Lower (S.H.I.S.): EC44/30 (Not Included)
  • Seat Collar: 30mm
  • Seatpost: 27.2mm
  • Front Derailleur (Clamp): Bottom-pull (28.6mm)
  • Bottom Bracket: 68mm Threaded (1.37" x 24 TPI)
  • Max Chainring:
    • 1x (Road): 44T
    • 2x (Road): 34/50T
    • 3x (Road): 30/39/50T
  • Tire Clearance (Frame):
    • 27.5 x 2.35" (Without Fenders)
    • 700c x 42mm (Without Fenders)
    • 650b x 50 (With Fenders)
    • 700c x 38mm (With Fenders)
  • Tire Clearance (Fork):
    • 27.5 x 2.35" (Without Fenders)
    • 700c x 42mm (Without Fenders)
    • 650b x 50 (With Fenders)
    • 700c x 38mm (With Fenders)
  • Rigid Fork Specifications:
    • 400 x 50mm (40 - 54cm)
    • 400 x 40mm (56 - 64cm)

Specification Notes:

  • Different tire and rim combinations will result in different clearances
  • Depending on drivetrain configuration, tire clearance may be limited by the chain and not frame
  • Listed chainring clearance is worst case scenario. Clearances vary widely depending on components and configurations

This product is expected to become available for purchase on Friday, September 29, 2023

Verified Owner
Monday, Aug 29 2022 (about a year ago)
Surly Midnight Special Frameset (Metallic Lilac) (650b) (50cm)
Really happy with how the build turned out with this frameset.

Sizing Recommendations for Riders Who Fall Between Sizes:

  • Sizing down will provide a more maneuverable ride while sizing up will provide more stability
Rider Height (Feet)Rider Height (CM)
40cm5' - 5'3"152 - 160cm
46cm5'3" - 5'5"160 - 165cm
50cm5'5" - 5'7"165 - 170cm
54cm5'6" - 5'9"168 - 175cm
56cm5'9" - 5'11175 - 180cm
58cm5'11" - 6'2"180 - 188cm
60cm6'2" - 6'5"188 - 196cm
64cm6'5" - 6'8"196 - 203cm

Note: All sizing recommendations are provided by the manufacturer and may differ for each rider.



Head Tube Angle71.0°71.5°72.0°72.5°73.0°73.0°73.5°74.0°
Head Tube Length95mm100mm110mm125mm140mm160mm180mm200mm
Seat Tube Length400mm460mm500mm540mm560mm580mm600mm640mm
BB Drop70mm70mm65mm65mm65mm65mm65mm65mm
Chainstay Length425mm425mm425mm425mm425mm425mm425mm425mm
Top Tube Length, Actual487mm506mm531mm552mm564mm579mm597mm622mm
Top Tube Length, Effective500mm520mm540mm555mm570mm585mm605mm625mm
Seat Tube Angle75.5°74.0°73.5°73.5°73.0°73.0°72.5°72.5°
Standover Height720mm751mm778mm806mm827mm846mm866mm895mm
Stem Length70mm70 or 80mm70 or 80100 or 120mm100 or 120mm120mm120mm120mm
Stem Angle
Handlebar Width400mm400mm400mm420mm440mm440mm460mm460mm
Crank Length165mm170mm170mm175mm175mm175mm175mm175mm
Fork Length400mm400mm400mm400mm400mm400mm400mm400mm
Fork Rake50mm50mm50mm50mm40mm40mm40mm40mm
Head Tube Angle71.0°71.5°72.0°72.5°73.0°73.0°73.5°74.0°
Head Tube Length3.7"3.9"4.3"4.9"5.5"6.3"7.1"7.9"
Seat Tube Length15.7"18.1"19.7"21.3"22"22.8"23.6"25.2"
BB Drop2.8"2.8"2.6"2.6"2.6"2.6"2.6"2.6"
Chainstay Length16.7"16.7"16.7"16.7"16.7"16.7"16.7"16.7"
Top Tube Length, Actual19.2"19.9"20.9"21.7"22.2"22.8"23.5"24.5"
Top Tube Length, Effective19.7"20.5"21.3"21.9"22.4"23"23.8"24.6"
Seat Tube Angle75.5°74.0°73.5°73.5°73.0°73.0°72.5°72.5°
Standover Height28.3"29.6"30.6"31.7"32.6"33.3"34.1"35.2"
Stem Length2.8"3.1"3.1"3.9"3.9"4.7"4.7"4.7"
Stem Angle
Handlebar Width15.7"15.7"15.7"16.5"17.3"17.3"18.1"18.1"
Crank Length6.5"6.7"6.7"6.9"6.9"6.9"6.9"6.9"
Fork Length15.7"15.7"15.7"15.7"15.7"15.7"15.7"15.7"
Fork Rake2"2"2"2"1.6"1.6"1.6"1.6"

Note: All measurements are provided by the manufacturer and may vary depending on how measurements are acquired.