Big Block

The Big Block track frameset represents our vision of the ideal track frame for the modern fixed gear rider. This is the bike that we’ve always dreamed of building and we are proud to make that dream available to you.  Each size frame has been evaluated for optimum tubing butt placements, diameter, and wall thickness.  Attention to detail is our mantra, and it shows in every aspect of this bike.  It soaks up bumps, sprints like mad, and begs to be ridden hard.  Ride it on the street or take it to the boards, the Big Block will hold up its’ end of the deal wherever you choose to ride it.

One of most exciting phases of the Big Block project was putting together the complete bike spec. Some of the choices were easy. Of course we're going to use our hubs and cranks. Others were not that simple, headset, rims, tires, etc. We feel that we've not only put together a well priced bicycle that any bike mechanic or nerd would be proud to ride as is, but that we have also righted many of the disappointments and shortcomings regarding traditional bike industry thought regarding complete bike spec.

Let's start with the cockpit: black 30mm riser bar with a comfy 9 degrees of sweep, mated to a quality four bolt alloy stem. We've spec'd a super nice Cane Creek S3 headset which will provide years of maintenance free smoothness. Traditionally the headset is one area where product managers down spec in order to save money on the complete package, the thinking being that consumers don't assign much value to a headset. This line of thinking has never sat right with us. Not only does a high quality headset provide a much nicer ride, but changing one out is a hassle requiring tools that most people don't own. In addition we've always felt that a highend headset is one of the clear indicators that a person truly appreciates quality and cares about their bike, and we hope that you'll care deeply for this one. You're also getting a matching set of front and rear brakes, the levers being hinged for easy on and off. For your sitting pleasure we've spec'd a sleek and comfy saddle, along with a Kalloy radiused top seatpost (an all-time favorite) which features a nice setback and traditional one bolt clamp design.

Moving on to the drivetrain: you'll find our own All-City 612 Track Crankset complete with 46tooth AC chainring and steel chainring bolts. The crankset is attached to our favorite square taper bottom bracket, the TH Industries 7420 featuring two steel cups (who needs plastic?), high quality bearings, and a weight savings of over 100g compared to similar square taper models. The cog in back is a 17 tooth, with All-City lockring, and the package is finished off with a silver KMC chain.

The wheelset features our own 32 hole Standard hubs (fixed/free), laced via DT Swiss Champion black spokes and DT silver brass nipples, to non-machined Alex R450s. The R450 is a 450g semi-aero rim featuring a durable triple box design. Completing the wheel package are a pair of one of our all time favorite tires, the venerable Vittoria Zaffiro in a 700X25c street friendly configuration.

In short, we've built this bike as we would want to own and ride it. It is a complete and thoughtful package with no part begging for an upgrade. But don't let the riser bars and brakes fool you, this thing has serious velodrome potential. Just swap out the bars and get after it.

The Big Block is also available as a frameset »


Features

Traditional track geometry: This bike was built for the boards. It features the steep angles and quick handling that you'd expect from a traditional track bike. It is 100% UCI track legal and would make an excellent classic velodrome racer.

Tire clearance: Check that fork crown and subtle dimple on the chain stays, you've got all the clearance you need without the ugliness of big open spaces. Space for 32c's if you're so inclined.

Steel tubing: Steel remains the preferred material for those who appreciate ride quality. It is the benchmark that all other frame materials are compared to, and for good reason. Nothing matches it's ride, fatigue life, or affordability.

Signature Dropouts: Investment cast from stainless steel, featuring built in chain tensioners, and the timeless Hennepin Bridge icon.  Dropout hardware is M4 x 0.8 x 40mm full thread.

Build Specs

Frame | All-City Big Block™
100% full 4130 ChroMoly steel. Double butted down, top, and seat tubes. Externally tapered, ovalized, and dimpled chain stays, tapered seat stays

Fork | All-City Big Block™
100% 4130 ChroMoly tapered fork blades, lugged crown and matching dropout

Headset | Cane Creek S3
Black, 6061 T6 aluminum, Black Oxide ACB bearings, 97.5g 

Stem | Kalloy
Black, four bolt, 1 1/8th threadless, 25.4 clamp

Handlebar | Kalloy
Black, alloy, 30mm rise, 9 degree sweep

Grips | Velo
Black 130mm

Brake Lever | Tektro RL570
Black clamp, black lever

Brake | Tektro R538
Alloy, front installed rear in parts box

Crankset | All-City 612 Track Crank
165mm Black with 46 tooth ring and steel chainring bolts

Bottom Bracket | TH Industries
Steel cups, sealed bearing, 68X110mm

Seatpost | Kalloy
Black, alloy, 27.2mm

Saddle | Velo
Black, comfy, racy

Cog | 17 tooth
CroMoly

Lockring | All-City
CroMoly

Chain | KMC
Silver 1/8th 

Hubs | All-City
Standard Track Hubs Black, Fixed/Free, 32 hole

Spokes | DT Swiss Champion
Black with silver brass nipples

Rims | Alex R450
Black, 32 hole, non-machined braking surface

Tires | Vittoria Zaffiros
700X25c Steel bead

Tubes | Cheng Shin
700X25 Presta Valve 

Part Numbers

Part Number Size Color Description  
bk4700 46cm Red/White  
BK4701 49cm Red/White  
BK4702 52cm Red/White  
BK4703 55cm Red/White  
BK4704 58cm Red/White  
BK4705 61cm Red/White  

Geometry

Geometry
 Size46cm49cm52cm55cm58cm61cm
(A)Head Tube Angle73.0°73.5°74°74.5°74.5°75°
(B)Seat Tube Angle75.0°75°74.5°74.5°74.5°74.5°
(C)Top Tube Length520 mm535 mm550 mm565 mm585 mm605 mm
(D)Seat Tube Length460 mm490 mm520 mm550 mm580 mm610 mm
(E)Chainstay Length396 mm396 mm396 mm396 mm396 mm396 mm
(F)Bottom Bracket Drop58 mm58 mm58 mm58 mm58 mm58 mm
(G)Fork Offset32 mm32 mm32 mm32 mm32 mm32 mm
(H)Axle to Crown375 mm375 mm375 mm375 mm375 mm375 mm
(I)Head Tube Length95 mm110 mm130 mm150 mm175 mm200 mm
(I)Wheelbase945.5 mm956.8 mm963.2 mm973.9 mm993.9 mm1008.8 mm