Product Category
113 Tooth CDX Belt Black
Technical specifications for the 113 Tooth CDX Belt Black are given below.
| TEETH | 113 |
| PITCH (MM) | 11 |
| LENGTH (MM) | 1243 |
| WIDTH (MM) | 12 |
| WEIGHT (G) | 88 |
| MATERIAL | Carbon fibre-reinforced polyurethane |
Gates Carbon Drive belts are made with stretch-free carbon fiber tensile cords. The advanced urethane technology thus allows the belt to be weather resistant, flexible, and durable. Although Gates engineers have developed high performance belt drives for thousands of industrial applications, Gates developed an entirely new belt to meet performance requirements for the bicycle industry.
- Carbon fiber as the base technology gives the highest modulus and strength
- Urethane body is rust-proof, even after 192 hours of salt-spray test
- Unlike chain, carbon fiber is length-stable and will not stretch
- 11 mm pitch profile provides optimal belt drive performance to meet the demands of human power
- Paired with Gates sprockets, the system provides smooth and quiet meshing, and proven durability
Gates sprockets provide a slimmer profile, lighter weight and better debris shedding, thus giving maximum drive performance in all environments, including muddy or snowy conditions. The patented CenterTrack design keeps the belt aligned on the sprocket. See the Gates Belt Drive Owners Manual for further details.
To find the correct belt and sprocket combination for your ride, you can use the Calculate tab of the Gates Carbon Drive Tension Tool to obtain the centre distance and speed ratio for a defined belt and sprocket combination. For more advanced calculations, download the Gates Drive Calculator (Microsoft Excel file; click "Enable editing" after opening) or use the online Bicycle Drive Assistant.
THREE KEYS WHEN WORKING WITH CARBON DRIVE
HANDLING
Gates Carbon Drive belts are highly durable. They offer long life when properly handled. However, caution must be used during installation to avoid damaging the carbon tensile cords. When they experience excessive bending and twisting, this creates crimps, which can lead to belt breakage.
Because of the risk of damage, in handling the belt, you must NOT:
- back bend
- use as a chainwhip
- bundle
- crimp
- twist or
- invert
ALIGNMENT
Alignment is critical. Hence, depending on the bike and setup, you may need to use spacers to ensure proper alignment. Noise, wear, or belt walk-off can be caused by sprockets that are out of alignment.
TENSIONING
Proper belt tension is needed for optimum operation of the Gates Carbon Drive system. Low tension can cause the belt to skip, and high tension can cause drag and unnecessary wear. Tensioning is possible using the Frequency tab of the Gates Carbon Drive Tension Tool phone app (available through the App Store).
The values below provide recommended starting values for belt tension, along with ranges within which the range can be adjusted to allow for differences in rider size, gear ratio and power on the pedals. Tension values in Hertz are obtained using the Gates Carbon Drive Tension Tool phone app; tension values in kilograms are obtained using the Krikit Belt Tension Meter.
| TENSIONING GUIDE | |||
| Hub Type | Application | App Reading | Krikit Reading |
| Internally Geared | Pedal Bike | 45 Hz (35–50 Hz) | 16 kg (13–18 kg) |
| Front-hub Motor eBike | |||
| Mid-motor eBike | 50 Hz (40–55 Hz) | 18 kg (15–19 kg) | |
| Conventional | Mountain Bike | 55 Hz (45–65 Hz) | 19 kg (16–22 kg) |
| Pinion Gearbox Bike | |||
| Geared Mid-motor eBike | |||
| Cargo Bike | |||
| Single-speed Bike | |||
| Tandem Bike | |||
| Rear-hub Motor eBike | |||
For frames with vertical dropouts, changing a flat tire does not require you to re-tension your belt.
See the Shop for further products.


