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FBM Halafast 20inch Frameset Deposit

FBM Halafast 20inch Frameset Deposit
FBM Halafast Frame FBM CB4ks Lukas Halahan Lukas Halahan

50% Deposit on FBM Halafast 20inch Frameset

Retail price $515 (with no FBM CB4k Retail Price is $370)

LAST DAY to PRE-ORDER is Sunday November 5th.  Frames will be shipping in the beginning of December.

The FBM Halafast --
Dialed For Modern Trail Riding -- Designed For Younger Riders

A 74.25 degree head tube angle, 13.5" chain stays (slammed), and a 9" stand over height keep the bike stable yet still nimble to whip.

The Halafast 20inch is based on the Steadfast, but scaled down for younger riders with input from Lukas Halahan.

We recommend a 28 or 30 tooth sprocket.

Handcrafted in the FBM Machine Shop in Ithaca, New York, USA
Learn More 

FBM Halafast 20inch Frame

Colors Clear, Gloss Black, Satin Trans Blue
Brake Position Chain Stay, Seat Stay
Top Tube Length 19-3/4"
Head Tube Angle 74.25 degrees
Head Tube Height 120mm
Bottom Bracket Height 11-5/8"
Seat Tube Angle 71 degrees
Standover Height 9"
Rear End Length 13-1/2" (slammed)
Dropout Spacing 110mm
Head Tube Integrated - Externally Machined 
4130 Chromoly
Top Tube 1-1/4" O.D. Double Butted 
4130 Chromoly
Top Tube Gusset 3D Laser Cut
4130 Chromoly
Down Tube 1-3/8" O.D. Double Butted 
4130 Chromoly
Down Tube Gusset 3D Laser Cut 
4130 Chromoly
Bottom Bracket Mid - Internally machined 
4130 Chromoly
Seat Tube Internally Butted 
4130 Chromoly
Seat Post Clamp Seat Clamp is Required
Seat Stays 3/4” O. D. x 0.035" Wall tapered to 5/8" OD
4130 Chromoly
Chain Stays Double Bend
3/4” O. D. x 0.049" Wall tapered to 5/8" OD
4130 Chromoly
Seat Stay Bridge 5/8" OD Tube
4130 Chromoly
Chain Stay Bridge 3/4" OD Tube
4130 Chromoly
Capped Stays Yes
Dropouts For 14mm axles
Heat Treated 3/16" Thick 4130 Chromoly
Brake Type Welded 990
Cable Stop Threaded and Slotted
Cable Guide Dual Slotted Tube
Weight 5lbs
Rear axle positions (with new chains)
  • 13-5/8" with a half link - 28/9, 30/11, 33/12
  • 13-3/4" without a half link - 25/9, 28/10
  • 13-3/4" with a half link - 30/10
  • 13-7/8" without a half link - 28/9, 30/11, 33/12

FBM CB4K's 20"

Featuring: A one piece CNC machined steerer tube, Roasted heat treated straight gauge legs, Roasted heat treated 3/16" laser cut dropouts that are angled at the bottom for grind clearance, a compression bolt that accepts a 6mm hex key for easy installation and removal, and clearance for 2.4" tires.

Handcrafted in the FBM Machine Shop in Ithaca, New York, USA

Colors Gloss Black, Gloss Clear
Offset 35mm
Tire Clearance 2.4"
Weight 35oz
Material 4130 chromoly steerer tube, legs & dropouts
Aluminum compression bolt
Axle to Crown 315mm
Steerer Tube Length 164mm
Bearing Race Requires press-on race
Steerer Tube Diameter 1-1/8"
Compression Bolt 25x1.5mm
Compression Bolt Tool 6mm Hex Key


Retail price $515
(with no FBM CB4k Retail Price is $370)
50% Deposit Due Now, 50% plus shipping due when frame is ready.

MSRP: $515.00
Price: $257.50
Brake Position
Include CB4k
Qty Out of stock, Check Your Local Bike Shop
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