Iuhu HL
Iuhu HL Frame
Carbon Enduro Frame Kit — Horst Link
“Iuhu” means Pure Joy in the Taiwanese indigenous Bunun language. The HL brings that joy in the most proven suspension form — the classic Horst Link, refined over years of racing and trail development.
The Iuhu HL is our most accessible full carbon enduro frame kit. Horst Link suspension, G-Volve geometry, K-Volve kinematics, and the same build quality as every DIRTLAB frame — at a price point that makes carbon enduro attainable. Factory to rider, no middlemen.
At a Glance
| Frame | Full carbon monocoque |
| Suspension | Horst Link (HL) |
| Head Angle | 65° (geometry chart: 145 mm rear, 160 mm fork, 29″) |
| Seat Tube Angle | 76.3° |
| Rear Travel | 140 / 145 mm |
| Fork Compatibility | 140–170 mm |
| Wheels | 29″/29″ or 29″/27.5″ mullet |
| Sizes | S / M / L |
| Derailleur Hanger | UDH (Universal Derailleur Hanger) |
| Warranty | 3-year frame / Crash replacement for life |
| Price | From USD 2,299 (≈ €2,090 incl. VAT) (frame kit) — free worldwide DDP shipping |
Descending: Horst Link
HL stands for Horst Link — the suspension design trusted by World Cup enduro teams for decades. The pivot point sits ahead of the rear axle on the chainstay, delivering a progressive leverage curve that resists pedal bob while remaining supple over impacts.
The Iuhu HL uses carefully tuned anti-squat and anti-rise values to deliver consistent behaviour: firm when you pedal, active when you descend. The 65° head angle provides confidence in steep terrain without sacrificing agility on tighter trails.
Climbing: Pure Pedal Enduro
Full carbon construction keeps weight low. The Horst Link’s progressive leverage curve means minimal pedal bob without needing to lock out your shock — climb efficiently in the open position.
- 76.3° seat tube angle for an efficient, upright climbing position
- Progressive anti-squat tuned for seated and standing efforts
- Two rear travel set-ups (140 / 145 mm) with 140–170 mm forks, from trail to enduro
- G-Volve geometry philosophy, as on every Dirtlab frame
Iuhu HL vs Iuhu CP
| Spec | Iuhu HL | Iuhu CP |
| Suspension | Horst Link | Concentric Pivot |
| Bottom Bracket | Standard threaded | T47 (89.5 mm) |
| Rear Travel | 140 / 145 mm | 145–165 mm |
| Downtube Storage | No | Yes (integrated) |
| Best For | Proven platform, wider travel range | Brake isolation, integrated storage |
| Price | From USD 2,299 (≈ €2,090 incl. VAT) | From USD 3,190 (≈ €2,890 incl. VAT) |
The DIRTLAB Formula
G-Volve Geometry
Long, not too low, and slack. 65° head angle × 76.3° STA. Balanced for speed on descents and efficient power transfer on climbs. Each size proportionally scaled.
K-Volve Kinematics
Horst Link layout with tuned anti-squat and anti-rise. Progressive leverage curve that resists pedal bob while staying supple over impacts. Consistent across all sizes.
S-Volve Sizing
Each size covers a range of rider heights, with the geometry scaled per size. The HL has no reach-adjust headset: reach is fixed per size.
Make It Yours
- Travel: Two rear travel set-ups: 140 mm (with a 140 mm fork) or 145 mm (with a 150–170 mm fork).
- Wheels: 29″/29″ or mullet 29″/27.5″.
- Cable routing: Internal for clean looks, or external for easy serviceability.
- Colors: Standard Gloss Light Green or full custom Pantone colors (6–8 week lead time).
- Decals: HRTF colour-changing silver brushed or black water decals under clearcoat.
Frame Kit Includes
- Full carbon HL frame
- UDH hanger (Universal Derailleur Hanger)
- Internal cable routing kit
The Iuhu Family
The Iuhu platform comes in multiple configurations for different riding styles:
Iuhu CP
Concentric Pivot enduro
T47 BB, downtube storage
From USD 3,190 (≈ €2,890 incl. VAT)
Iuhu HL
Horst Link enduro
Proven platform
You are here
Iuhu LT Ti
Titanium hardtail
150 mm fork (140–160 mm)
From USD 1,990
Iuhu Pinion
Gearbox enduro
Pinion drivetrain
Coming soon
Frequently Asked Questions
What is the Iuhu HL?
A full carbon enduro frame kit using a Horst Link suspension layout with DIRTLAB’s G-Volve geometry and K-Volve kinematics. It is the most affordable frame in the DIRTLAB lineup, starting at USD 2,299 (≈ €2,090 incl. VAT).
What is a Horst Link suspension?
The Horst Link places the rear pivot point on the chainstay ahead of the rear axle. This produces a progressive leverage curve that resists pedal bob while remaining supple over impacts. It is the most proven enduro suspension layout, trusted by World Cup teams for decades.
What is the difference between Iuhu HL and Iuhu CP?
The HL uses Horst Link suspension and is more affordable (USD 2,299 (≈ €2,090 incl. VAT)). The Iuhu CP uses Concentric Pivot suspension with a T47 BB and integrated downtube storage (USD 3,190 (≈ €2,890 incl. VAT)). Both follow the G-Volve geometry philosophy. See the comparison table above for full details.
What is included in the frame kit?
Full carbon HL frame, UDH hanger, and internal cable routing kit. You add suspension, wheels, drivetrain, brakes, and cockpit to complete the build.
How much travel can I run?
The Iuhu HL has two rear travel set-ups: 140 mm with a 140 mm fork, or 145 mm with a 150–170 mm fork.
Can I run it as a mullet (mixed wheel)?
Yes. The Iuhu HL supports 29″/29″ or 29″/27.5″ mullet configurations.
What colors are available?
Standard finish is Gloss Light Green with HRTF water decals. Full custom Pantone colors are available with a 6–8 week lead time. Contact us for custom color pricing.
What does DDP shipping mean?
Delivered Duty Paid. The price you see is the price you pay — we handle all import duties, taxes, and customs clearance. Free worldwide shipping on all frame kits. No surprise fees at your door.
What is the warranty?
3-year frame warranty, crash replacement for the life of the frame. First owner only. See our Warranty Policy for full details.
Build Your Iuhu HL
Frame kit from USD 2,299 (≈ €2,090 incl. VAT) • Custom Pantone colors available • Free worldwide DDP shipping