MPLS Skyline

Big Block


The Big Block represents our vision of the ideal track frame for the modern fixed-gear rider. This is the track bike that we’ve always dreamed of owning and we are proud to make that dream available to you. 

It was designed first and foremost as a true competition-ready track frame but was destined to see usage beyond the velodrome, so we made some tweaks to the equation. Instead of the track bike norm 25c max tire clearance, it fits a 32c cross tire and has a single set of water bottle mounts for all day in the saddle. The front and rear of the bike are drilled out for a brake, so single speeding (or double brake fixed) is no problem.

Our proprietary 612 Select double-butted cro-moly steel soaks up bumps and sprints like a champ.  Each piece of tubing on every frame size has been carefully scrutinized and specifically chosen to create the best ride possible. This includes butting placement, tubing diameter and wall thickness.

The package is finished off with a custom headtube badge, brazed-on seat collar, custom bottom bracket and signature Hennepin Bridge dropouts. We add an E.D. coating for rust prevention before applying a classic wet paint finish.  Attention to detail is our mantra and it shows in every aspect of this meticulously-designed, beautifully-constructed track racer.

Big Block

612 Select Tubing

Our proprietary blend of 4130 double-butted CroMoly tubes. Every piece of tubing on every frame size has been carefully chosen to provide the best ride possible.

E.D. Coating

In Electrophoretic Deposition, or E.D., coating the frame or fork is placed in a paint bath where an electric charge is applied. This fuses a thin layer of black satin coating to the tubes inside and out. This coating acts as both a rust preventative inside and a primer out.

Custom Details

We’re way into the handbuilt touches when it comes to our frames. Which is why you’ll find things like internal cable routing, custom dropouts, lugged crown forks, reinforcements on the bottle bosses, hidden fender mounts, etc on our framesets.

Signature Dropouts

Our signature horizontal dropout has become one of our calling cards. It functions superbly, looks way cool, and the adjustment screw allows the use of quick release wheels.

Frame + 612 Select ChroMoly steel. Double butted down, top, and seat tubes. Externally tapered, ovalized, and dimpled chain stays, tapered seat stay
Fork + 4130 ChroMoly tapered fork blades, lugged crown and matching dropout. Straight Steertube
Rear spacing + 120mm
Brake Compatibility + Road Caliper Mid Reach 47-57mm
Seatpost diameter + 27.2
Headset + 1-1/8" threadless, EC34 upper & lower, Crown race 30.0
Bottom Bracket Shell + 68mm English
Chainring clearance + 60 Tooth max
Tire clearance + 700x32
Extras + ED coated
Headset + Cane Creek 10 series
Stem + Kalloy 1-1/8th threadless, 26.0 clamp
Handlebar + Kalloy Track, 183mm drop
Tape + Black
Brake Lever + Tektro RL720
Brake + Tektro R538, mid reach, front installed, rear included
Crankset + All-City 612 Track Crank, 165mm, 46 tooth ring
Bottom Bracket + 68x110mm steel cups, sealed bearings
Seatpost + Kalloy 27.2
Saddle + All-City Gonzo
Cog + All-City standard 17T
Lockring + All-City standard
Chain + KMC silver 1/8"
Hubs + All-City Standard Fix/Free 32h
Rims + Alex DC19 32h
Tires + Vittoria Zaffiros 700x28, steel bead
Big Block Geometry Linedrawing
Select up to 3 sizes to view:

Size 46cm 49cm 52cm 55cm 58cm 61cm
Head Tube Angle (A) 73 73.5 74 74.5 74.5 75
Seat Tube Angle (B) 75 75 74.5 74.5 74.5 74.5
Top Tube Length (C) 520 535 550 565 585 605
Seat Tube Length (D) 460 490 520 550 580 610
Chainstay Length (E) 396 396 396 396 396 396
Bottom Bracket Drop (F) 58 58 58 58 58 58
Fork Offset (G) 32 32 32 32 32 32
Total Fork Length (H) 375 375 375 375 375 375
Head Tube Length (I) 95 110 130 150 175 200
Standover (J) 750 772 796 821 847 874
Wheelbase (K) 945.5 956.8 963.2 973.9 993.9 1008.8
Stack (L) 508.8 524.6 545.3 566 590.2 615.9
Reach (M) 383.7 394.4 394.4 398.8 421.3 434.2
Handlebar Width 40 40 42 42 44 44
Stem Length 80 90 100 100 110 110
Crank Arm Length 165 165 165 165 165 165
BK4706 Complete 46cm
BK4707 Complete 49cm
BK4708 Complete 52cm
BK4709 Complete 55cm
BK4710 Complete 58cm
BK4711 Complete 61cm
FM4706 Frameset 46cm
FM4707 Frameset 49cm
FM4708 Frameset 52cm
FM4709 Frameset 55cm
FM4710 Frameset 58cm
FM4711 Frameset 61cm