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BigLeaf

BigLeaf

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Every year we build a few special projects in small batches, like this one. Join the mailing list to stay up to date.

We wanted to create a gravel bike we would ride and own. Gravel bikes are all over the place these days: huge tires, suspension, storage, aero, integrated, etc... In our opinion, those ruin the very thing that makes the gravel bike great: its simplicity. With BigLeaf, we designed it for a relaxed fit, clean lines, and nimble handling. No gimmicks, just a simple, reliable steel gravel bike.

Size chart · Geometry

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  • Specs

    • Short 425mm chainstays
    • 700x55 max clearance
    • Deep 80mm BB drop
    • Quad butted Heat Treated 4130 Steel

  • Builds

    Customizable build kits and parts. See build kits

  • Sizing

    Five sizes fit riders from 5’4”–6’3”. See size chart

  • Origin

    Made in small batches in the best Taiwanese factories. Learn more

Size Chart

For most riders, we recommend choosing the size that corresponds to your height.

52cm
5'4–5'7
54cm
5'7–5'9
56cm
5'9–5'11
58cm
5'11–6'1
60cm
6'1–6'3

Geometry

The Big Leaf features a well-balanced geometry: 71-71.5° HTA, tall stack, moderate wheelbase, and designed around a 70mm stem. This gives the bike a good balance of quick handling and agility while maintaining stability on road and gravel surfaces.

Size
52cm
54cm
56cm
58cm
60cm
Stack
562
572
593
612
631
Reach
377
382
390
394
402
Eff. Top Tube
542
548
562
572
585
Seat Tube Length
490
510
540
560
580
Seat Tube Angle
73.9
73.9
73.9
73.8
73.8
Head Tube Angle
71
71
71.5
71.5
71.5
Wheel Base
1015
1022
1032
1042
1056
Chainstay
425
425
425
425
425
BB Drop
80
80
80
80
80

Specs

Drivetrain: 1x Gravel Drivetrains, UDH

Fork: 49 off 398a2c // 55.5 off 406a2c

Bottles: 2x main triangle, 1x below DT

Wheelsize: 700c

Tire Clearance: 55mm

Rear Axle: 142x12

Front Axle: 100x12

Bottom Bracket: Threaded BSA 68mm

Headtube: EC34/44 Tapered

Seatpost Diameter: 27.2mm

Ride Quality

The magic of steel is its springy, lively ride quality. We worked closely with our manufacturing partners to ensure that the Big Leaf maintains the ride quality our custom frames are known for.

  • Quad butted, heat treated, chromoly tubing
  • Optimized butt lengths
  • Size-specific tube sizes

Thoughtful Features

  • Two bottles in every size
  • Easy-to-maintain external cable routing with reusable metal clips
  • Threaded bottom bracket for hassle-free maintenance
  • Fixed dropouts for a clean aesthetic
  • Room for 700x55c tires for confidence on any terrain

The Archive

Every year we build a few special projects in small batches, like this one. Join the mailing list to stay up to date.