Carbon Gravel Bike Frame

Yes, and carbon is now the default material for performance gravel frames. Carbon lets a frame be shaped for compliance in one direction and stiffness in another, which is exactly what a gravel frame needs: a compliant rear end and fork for washboard surfaces, and a stiff bottom bracket and head tube for pedalling and cornering. All twelve Mondince gravel platforms are full carbon fibre from Toray, with no fibreglass blends. The comparison table above lists the exact grade used on each platform.

Three real ones. First, cost: carbon framesets cost more than aluminium, because the layup is labour intensive and the tooling is expensive. Second, impact damage: carbon can be damaged by a hard strike where steel or aluminium would dent, which is why our frames are tested to the ISO 4210-6 frame impact case at 360 mm and 92.3 J rather than the milder racing case. Third, handling: carbon needs a torque wrench and correct clamping, because over-tightening a seatpost clamp can crush a tube. All three are manageable, which is why carbon dominates gravel racing.

It depends on the priority. Carbon gives the best stiffness-to-weight ratio and the most control over ride feel, and it is the right choice for racing, climbing and long-distance comfort. Titanium gives durability and a distinctive ride but weighs more and costs more. Steel and aluminium are cheaper and more forgiving of workshop mistakes but heavier. For a carbon gravel bike frame specifically, the more useful question is which layup and which geometry, not which material.

Most riders are best served by 45 to 50 mm. That covers fast gravel racing on 40-45 mm and rough, loose surfaces on 50 mm without slowing the bike down. Choose 57 mm if you regularly ride loose rock, sand or mud, and 61 mm if you are bikepacking with wide 650B or 700C volume. Every clearance figure we publish is measured with a 32 mm internal rim width, so it reflects real-world setups rather than a narrow test rim. Our platforms run from 42 mm on the FM166 cyclocross frame to 61 mm on the FM356.

Mondince gravel frames run from 950 g on the FM286 to 1,150 g on the FM346, FM316, FM296 and FM266. Those figures are for size M, raw finished (unpainted), with no hardware, and carry a plus or minus 30 g tolerance. Larger sizes and painted frames weigh more, so always compare like with like when you look at another brand.

Choose by terrain and load. For racing and climbing, FM286 at 950 g or FM336 at 1,050 g with 47 mm clearance. For aero gravel racing on 57 mm tires, FM366 or FM376. For bikepacking, FM356 at 61 mm, or FM326 if you want a flip-chip fork that runs both 650B x 2.1 in and 700C. For all-day endurance, FM316 or FM306. For value builds and shop stock, FM266; for cyclocross racing, FM166.

A single Mondince carbon gravel frameset is US$500 to US$650 depending on the platform and the finish you choose. Bulk production orders start at US$450 per frameset. The final figure follows the model, the size run, the paint, the hardware package and the quantity, so send us the specification and we will return a written quote within 24 hours.

Ten of the twelve platforms use a T47 85.5 mm threaded bottom bracket, and eleven use the UDH (Universal Derailleur Hanger). That means a standard threaded BB tool and a hanger you can buy from SRAM or any UDH-compatible brand, rather than a proprietary part that only we supply. FM266 can be ordered with a BSA / BB86 or T47 shell, and FM166 uses BSA with a standard hanger.

Sample orders start at a single frameset, so you can test the platform, the layup and the finish before committing. Production minimum order quantity is 30 sets across all twelve platforms, with mixed size runs counted towards the same order. Sample and single-frameset orders take about 15 days, and bulk production takes about 50 days from artwork approval. Custom paint, logos and packaging are supported.

Yes, and the detail matters. ISO 4210 has no gravel category, so every gravel frame has to be tested against the city, mountain or racing cases. We test to ISO 4210-2:2023 and ISO 4210-6:2023 using the mountain-bicycle load cases, which are by far the toughest of the three for impact: a 360 mm striker drop absorbing 92.3 J, versus 212 mm and 56.1 J for the racing case. On top of that we apply an internal 1.3x margin on drop height. Our frames are also built to ASTM F2043-13 Condition 2, the usage condition that actually describes gravel riding.