Quiver

Forbidden2026

2026 Forbidden Heathen Framekit

Trail

The 2026 Forbidden Heathen Framekit sits in the middle of the range for trail bikes, with a slacker head angle. Reach 435 to 495 mm, stack 621 to 648 mm.

Source: forbiddenbike.com. Checked .

Key facts

Model
Heathen
Model year
2026
Frame
Framekit
Type
Trail
Geometry labels
S1, S2, S3, and S4
Geometry
Complete for every size
Source
forbiddenbike.com
Checked

Geometry by size

2026 Forbidden Heathen Framekit geometry by size
MeasurementS1S2S3S4
Reach(mm)435455475495
Stack(mm)621630639648
Head tube angle(°)64646464
Seat tube angle(°)76767676
Effective top tube(mm)590612634657
Wheelbase(mm)1155.41192.81232.21270.6
BB height(mm)301301311311
Standover(mm)716728740764
Seat tube length(mm)400420440470
Fork length(mm)541541541541
Head tube length(mm)90100110120

Stock build

Frameset only

Sold as a frameset, without a build kit.

Keep your Heathen Framekit in Quiver

Start from this build's stock parts, then record your upgrades. Review it before adding it to your garage.

Free on App StoreFree on Google PlayFree for your first bike, on iPhone and Android.

Already have Quiver? Open this build

Quick answers

Which size or configuration labels have geometry for the 2026 Forbidden Heathen Framekit?
Geometry is listed for S1, S2, S3, and S4.
What are the reach and stack of the 2026 Forbidden Heathen Framekit in size S3?
In size S3, reach is 475 mm and stack is 639 mm.
What is the head tube angle of the 2026 Forbidden Heathen Framekit?
The head tube angle is 64 degrees in every size.
Which years of the Forbidden Heathen are on Quiver?
Quiver has the Forbidden Heathen for 2026.

Know what is on every bike.

Add your bike to Quiver. Keep its parts, setup, and service history together, then share your build.

Explore the app
A Transition Relay build sheet: frame, fork, shock and drivetrainThe Relay’s ride photo galleryThe Relay’s ride spectrum and 2D frame geometryThe garage: five bikes and 99 recorded partsA Specialized Tarmac SL8 road build sheet

Quiver keeps track of the bikes you own.

Free on App StoreFree on Google Play