Dirtlab Geo Calc
Dirtlab Geometry Calculator Paratu CP · Iuhu CP
⚠ CENTER chip (0 mm) is not recommended with 160 mm or 165 mm rear travel and 160–170 mm fork. Use FORWARD or BACKWARD chip with these settings.
✗ FOR/BAC ±2.5mm chip with 29" rear wheel is not compatible with 160mm or 165mm rear travel — rear tyre contacts the seat tube. Switch to Mullet (27.5" rear) or select 57.5mm / 60mm stroke.
Head Tube Angle
63.9
°
Seat Tube Angle
77.8
°
BB Height
340
mm
BB Drop (29" front axle)
−38
mm below axle
Trail = (R₂₉ × cos HTA − offset) ÷ sin HTA  ·  Front always 29" (R₂₉ = 378 mm)  ·  More offset → less trail → lighter steering
Front Center
821
mm
Chainstay
448
mm
Wheelbase ≈
1269
mm
Seat Tube
mm
Suspension Setup — PSI · spring rate · damper · volume spacers →

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