Bikes. Parts. Chaos.

Midnight Special is a road plus bike designed to provide comfort and speed on those all-day rides that extend well beyond fresh pavement.

Midnight Special shines on pot-holed, deteriorating pavement and the occasional long stretch of gravel. Its 650b road plus tires eat up road chatter and absorb all the bumps in the road like the champion it was designed to be.

When it comes to road bikes, we just want to toss a few bananas into our pockets and see where the road takes us. We seek out varied surfaces on our rides and frequently go from pavement to gravel to shittier pavement. Midnight Special allows us to accomplish all of that quite comfortably.

  • Higher volume tires allow better fine tuning of tire pressure on varying surfaces and create a wider contact patch for increased traction
  • Modern road standards like flat-mount disc brakes, 12mm front and rear thru-axles, and a 44mm head tube
  • Clearance for 650b x 60mm or 700c x 42mm tires without fenders (650b x 50mm or 700c x 38mm with fenders)

Bike Capabilities

  • 5/5 with Tire Clearance
  • 5/5 with Road Rides
  • 5/5 with Gravel
  • 4/5 with Commuting

NOTE: You can ride your bike wherever the hell you want, but this is what we think this bike is best at.

Midnight Special riding over railraod tracks
Midnight Special riding around corner
Midnight Special riding on bike path
Midnight Special riding on gravel
Midnight Special riding over cobblestones
Midnight Special cornering
Midnight Special bike side view

#midnightspecial Image Dump

#SurlyMakeItYourOwn
Tag your Instagram Images with #SurlyMakeItYourOwn and your bike may show up here.

Where to Buy

Midnight Special Bike Hot Mayonnaise

Specifications

Frameset

Frame 4130 CroMoly, double-butted main triangle, ED coated, TIG-welded
Fork 4130 CroMoly, ED coated, TIG-welded
Seatpost Clamp 30.0mm Surly Stainless

Components

Headset Cane Creek 40, 1-1/8"
Brakes TRP Spyre, 160mm rotors
Brake Levers Sram Rival 22
Shifters Sram Rival 22
Stem ProMax, 31.8 4 bolt
Handlebar Salsa Cowbell 3
Grip/Tape Black Cork
Saddle WTB Volt Sport
Seatpost Promax

ProMax SP-2019 27.2x300mm non-offset (for 40-50)
ProMax SP-2016 27.2x300mm offset (for 54-64cm)

Drivetrain

Crankset Sram S390 50/34t
Bottom Bracket SRAM GXP
Front Derailleur Sram Rival 22
Rear Derailleur Sram Rival 22
Cog or cogset SunRace 11-32, 11 speed
Chain KMC X11

Wheels

Front Hub Formula RX-812, 12mm thru, 32h
Rear Hub Formula RX-300, 142mm thru, 32h
Rims Alex Adventurer 2 32h tubeless compatible
Tires WTB Horizon, 650b x 47, tan wall
Midnight Special Geo
units:
  • in
  • mm
40cm 46cm 50cm 54cm 56cm 58cm 60cm 64cm
Reach 14.3 363 14.4 366 14.9 379 15.3 389 15.5 393 15.8 402 16.1 409 16.7 423
Stack 20.9 531 21.2 538 21.4 544 22.0 560 22.8 580 23.6 599 24.4 620 25.2 641
Head Tube Angle 71.0° 71.5° 72.0° 72.5° 73.0° 73.0° 73.5° 74.0°
Head Tube Length 3.7 95 3.9 100 4.3 110 4.9 125 5.5 140 6.3 160 7.1 180 7.9 200
Seat Tube Length 15.7 400 18.1 460 19.7 500 21.3 540 22.0 560 22.8 580 23.6 600 25.2 640
BB Drop 2.8 70 2.8 70 2.6 65 2.6 65 2.6 65 2.6 65 2.6 65 2.6 65
Wheelbase 39.1 993 39.1 994 39.6 1007 40.1 1018 39.8 1012 40.4 1027 40.8 1036 41.3 1050
Chainstay Length 16.7 425 16.7 425 16.7 425 16.7 425 16.7 425 16.7 425 16.7 425 16.7 425
Top Tube Length, Actual 19.2 487 19.9 506 20.9 531 21.7 552 22.2 564 22.8 579 23.5 597 24.5 622
Top Tube Length, Effective 19.7 500 20.5 520 21.3 540 21.9 555 22.4 570 23.0 585 23.8 605 24.6 625
Seat Tube Angle 75.5° 74.0° 73.5° 73.5° 73.0° 73.0° 72.5° 72.5°
Standover Height 28.3 720 29.6 751 30.6 778 31.7 806 32.6 827 33.3 846 34.1 866 35.2 895
Stem Length 2.8 70 3.1 80 3.1 80 3.9 100 3.9 100 4.7 120 4.7 120 4.7 120
Stem Angle
Handlebar Width 15.7 400 15.7 400 15.7 400 16.5 420 17.3 440 17.3 440 18.1 460 18.1 460
Crank Length 6.5 165 6.7 170 6.7 170 6.9 175 6.9 175 6.9 175 6.9 175 6.9 175
Fork Length 15.7 400 15.7 400 15.7 400 15.7 400 15.7 400 15.7 400 15.7 400 15.7 400
Fork Rake 2.0 50 2.0 50 2.0 50 2.0 50 1.6 40 1.6 40 1.6 40 1.6 40
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 with Surly 10/12 Adapter Washers (not included)

Front Hub Spacing

12 x 100mm (Surly axle included)

Rear Brake

Disc - Flat Mount (160mm max rotor)

Front Brake

Disc - Flat Mount (160mm max rotor)

Head Tube

Ø44mm

Steerer Tube

Ø28.6mm (1-1/8")

Crown Race

Ø30mm (1-1/8")

Stock Headset Upper (S.H.I.S.)

ZS44/28.6

Stock Headset Lower (S.H.I.S.)

EC44/30

Seat Collar

Ø30mm

Seat Post

Ø27.2mm

Front Derailleur (Clamp)

Bottom-pull (Ø28.6mm)

Max Chainring (CL)[3]

1x (Road): 44T

2x (Road): 34/50T

3x (Road): 30/39/50T

Bottom Bracket

68mm threaded (1.37" x 24TPI)

Tire Clearance Frame [1]/[2]

27.5 x 2.35"  (w/o fenders)

700c x 42mm (w/o fenders)

650b x 50 (w/ fenders)

700c x 38mm (w/ fenders)

Tire Clearance Fork [1]

27.5 x 2.35" (w/o fenders)

700c x 42mm (w/o fenders)

650b x 50 (w/ fenders) 700c x 38mm (w/ fenders)

Rigid Fork Spec

400 x 50mm (40 - 54cm)

400 x 40mm (56 - 64cm)

Max Suspension Fork Length [4]

N/A

Bottle Mounts Frame

3 Standard

Bottle Mounts Fork

N/A

Rack Mounts Frame

Yes (upper and lower threaded)

Rack Mounts Fork

Yes (upper, lower, and mid-blade threaded)

Fender Mounts Frame

Yes

Fender Mounts Fork

Yes

Other Features

Downtube mounted shifter bosses

[1] Different tire and rim combinations will result in different clearances.  
[2] Depending on drivetrain configuration, tire clearance may be limited by the chain and not frame.
[3] Listed chainring clearance is worst case scenario.  Clearances vary widely depending on components and configurations.
[4] Suspension fork length listed at full extension (not at sag) 

FAQ & Reviews

Support

Frame Warranty

LIMITED WARRANTY

This Surly product is warranted against defects in materials and workmanship for three years from the date of retail purchase of the product, subject to the limitations detailed below. Save your dated receipt for proof of purchase.

This warranty does NOT cover the following:

  • Damage due to improper assembly or follow-up maintenance or lack of skill, competence or experience of the user or assembler
  • Products that have been modified, neglected, used in competition or for commercial purposes, misused or abused, involved in accidents or anything other than normal use
  • Installation of components, parts or accessories not originally intended for or compatible with bicycle as sold
  • Damage or deterioration to the paint, surface finish, aesthetics or appearance of the product
  • Normal wear and tear
  • Labor required to remove and/or refit and re-adjust the product within the bicycle assembly

This limited warranty is expressly limited to the repair or replacement of a defective product, at the option of Surly, and is the sole remedy of the warranty. This limited warranty applies only to the original purchaser of the Surly product and is not transferrable. This warranty applies only to products purchased through an authorized dealer or distributor. In no event shall Surly be liable for any loss, inconvenience or damage, whether direct, incidental, consequential, or otherwise resulting from breach of any express or implied warranty or condition, of merchantability, fitness for a particular purpose, or otherwise with respect to our products except as set forth herein.

This limited warranty gives the consumer specific legal rights, and those rights and other rights may vary from place to place. This limited warranty does not affect your statutory rights.

TO THE EXTENT NOT PROHIBITED BY LAW, THESE WARRANTIES ARE EXCLUSIVE AND THERE ARE NO OTHER EXPRESS OR IMPLIED WARRANTIES OR CONDITIONS INCLUDING WARRANTIES OR CONDITIONS OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.