Tutumaz XC FLX Ti
Tutumaz XC FLX Ti — a titanium front triangle with a carbon flexstay rear end (FLX = flexstay). 100 mm or 110 mm rear travel depending on the shock stroke, a 100–130 mm fork and 29-inch wheels. Hand TIG-welded, built to order.
Made to order · 60 days · 50 % deposit, balance before shipping
From USD 3,190 (brushed titanium + black water decal) · laser logo instead of decals +USD 129 · satin bead-blasted or high polish +USD 149 · free worldwide shipping for end consumers.
Configure your Tutumaz XC FLX Ti →
What FLX means
The rear triangle is carbon and has no pivot at the rear axle. The carbon seat stays flex through the travel, while the 190 mm metric shock and the rocker on the seat tube control the movement. Titanium in front for compliance, carbon at the back for stiffness.
Frame specifications
- Frame: 3Al-2.5V titanium front triangle, carbon flexstay rear triangle
- Rear travel: 100 mm or 110 mm, depending on the shock stroke · rear shock 190 mm metric
- Fork: 100–130 mm, 29″ · head tube angle 67.0°
- Wheels: 29″ front and rear, 29 × 2.4″ tyres · rear 148 × 12 mm Boost, UDH
- Rear brake: post mount, 160 mm rotor · headset press fit 44 / 56 mm
- Bottom bracket: BSA threaded (1.37″ × 24 TPI) · 52 mm chainline · max 36T round / 34T oval chainring
- Seatpost: 31.6 mm (all Dirtlab titanium frames)
- Frame weight: 2,349 g, size M
- Sizes: XS, S, M, L, XL, XXL · custom geometry for the titanium front triangle only (the carbon flexstay stays standard)
- Warranty: 5 years on the frame (production and material defects)
Geometry
XXL: geometry on request, made to measure.
| XS | S | M | L | XL | |
|---|---|---|---|---|---|
| Reach | 376 | 406 | 436 | 461 | 486 |
| Stack | 603 | 593 | 597 | 611 | 626 |
| Top tube (horizontal) | 537 | 567 | 600 | 632 | 660 |
| Head tube angle | 67.0° | 67.0° | 67.0° | 67.0° | 67.0° |
| Head tube length | 95 | 95 | 100 | 115 | 135 |
| Seat tube angle | 75.5° | 74.8° | 74.5° | 74.5° | 74.5° |
| Seat tube length | 380 | 400 | 420 | 460 | 500 |
| Wheelbase | 1113 | 1139 | 1171 | 1201 | 1234 |
| Chainstay | 445 | 445 | 445 | 445 | 445 |
| BB height | 326 | 336 | 336 | 336 | 336 |
| BB drop | 46 | 36 | 36 | 36 | 36 |
| Rider height (cm) | 155–165 | 155–165 | 165–175 | 175–185 | 185+ |
All measurements in mm. Fork 530 mm axle-to-crown (120 mm travel), 44 mm offset, 29 × 2.4″ tyres.
The name
Tutumaz is the Taiwanese indigenous name for the Formosan black bear. At Dirtlab it stands for our cross-country titanium frame. Looking for a titanium hardtail? See the Iuhu HT Ti and the Iuhu PT Ti, or read about our titanium process.