Frame Information
Built for XC/trail riding, our XC frames are designed for a beautifully balanced and nimble ride. We've specially selected a tube set that gives you the compliance and comfort in the saddle, that you only get from a quality steel butted front end and carefully selected seat and Chainstays.
The XC frames come in two models: the XC7 for 27.5” wheels or the XC9 for 29” wheels.
Both XC frames have been designed to run a 100mm to 120mm fork and a 31.6mm dropper post and have plenty of tyre clearance for a 2.6" tyre.
On this model we give you the option on the seat tube to change from a dropper to a standard 27.2mm post.
You can easily turn these models into a bikepacking rig by simply adding extra bottle bosses and rack mounts.
The reasons a Curtis feels different.
Since 1972, we've built steel frames recognised among the finest in England.
Fillet Brazing
Brian Curtis' signature brazing technique creates beautiful rippled joints and airtight tubes, protecting Curtis frames from internal rust.
Discover fillet brazing
Made To Order
Every frame is made to order in Somerset, this is what makes a Curtis special. In the configurator, change every part of your new frame.
See how we build each frame
Premium Steel
Reynolds, Columbus, Dedacciai, and T45 are cherry picked frame by frame for an unmatched strength-to-weight ratio, and ride feel.
Explore our premium steelModel Differences
Technical Specifications
| Specification | Detail |
|---|---|
| Wheel size | Compatible with 27.5" or 29" wheels |
| Fork travel | Designed for 100mm to 120mm travel |
| Seat tube options | 31.6mm dropper post with integral 5mm Allen bolt clamp, or 27.2mm post with choice of 30mm QR clamp or integral 5mm Allen bolt |
| Head tube | Tapered compatibility (Top: ZS44/28.6 | Bottom: EC44/40) |
| Bottom bracket | 73mm BSA threaded |
| Dropouts | UDH (Universal Derailleur Hanger) |
| Tyre clearance | Fits up to 2.6" tyres with 10mm mud clearance on both sides |
| Bottle mounts | Two sets standard (seat tube and down tube) |
| Customisation | Extra bottle bosses available at £30 per pair |
Tubing Used
| Tubing | Material |
|---|---|
| Down tube | Reynolds 853 butted |
| Top tube | Reynolds 853 butted |
| Seat tube | Reynolds 631 |
| Seatstays | Columbus |
| Chainstays | Dedacciai |
Geometry Chart
| Curtis XC7 | XS | S | M | L | XL | XXL |
|---|---|---|---|---|---|---|
| S/T | 15 | 16 | 17 | 18 | 19 | 20 |
| FORK | 100 | 100 | 100 | 100 | 100 | 100 |
| H/T | 100 | 100 | 110 | 110 | 120 | 130 |
| H/T ANGLE | 68 | 68 | 68 | 68 | 68 | 68 |
| S/T ANGLE | 74 | 74 | 74 | 74 | 74 | 74 |
| REACH | 435 | 445 | 460 | 475 | 490 | 510 |
| STACK | 548 | 548 | 557 | 557 | 566 | 575 |
| B/B DROP | -55 | -55 | -55 | -55 | -55 | -55 |
| B/B HEIGHT | 295 | 295 | 295 | 295 | 295 | 295 |
| C/S | 425 | 425 | 425 | 425 | 425 | 425 |
| XC9 | S | M | L | XL | XXL |
|---|---|---|---|---|---|
| S/T | 16 | 17 | 18 | 19 | 20 |
| FORK | 100 | 100 | 100 | 100 | 100 |
| H/T | 100 | 110 | 110 | 120 | 130 |
| H/T ANGLE | 68 | 68 | 68 | 68 | 68 |
| S/T/ANGLE | 74 | 74 | 74 | 74 | 74 |
| REACH | 445 | 460 | 475 | 490 | 510 |
| STACK | 610 | 619 | 619 | 629 | 638 |
| B/B DROP | -65 | -65 | -65 | -65 | -65 |
| B/B HEIGHT | 303 | 303 | 303 | 303 | 303 |
| C/S | 440 | 440 | 440 | 440 | 440 |










