Description
55 Tooth 175 mm S550 CDX:EXP Crankset 51.7-54.7 belt line
Technical specifications for 55 Tooth 175 mm S550 CDX:EXP Crankset:
| PART # | S550 CDX:EXP 175 55T Black NG | BELT LINE (mm) | 51.7-54.7 |
| TYPE | S550 | BCD | Direct mount |
| TEETH | 55 | MATERIAL CRANK | Forged 6061 crank arms with 24 mm chromoly spindle |
| ARM LENGTH (mm) | 175 | MATERIAL SPROCKET | Aluminum |
| BOTTOM BRACKET | 68MM/73MM Threaded (BB not included) | FINISH | Black Ano |
| BOTTOM BRACKET SHELL SPEC (mm) | 68/73 | WEIGHT (grams) | 875 (includes belt ring) |
Gates cranksets include CDX™ sprockets, and provide the specific belt line required for several popular geared hubs. The crankset features a clean industrial design, Cranks use a outboard bottom bracket such as Shimano threaded, FSA Mega XO or similare.
See tech manual for additional details: Gates Carbon Drive Technical Manual
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.
Use the Gates Drive Calculator to find the perfect fit for your ride.
THREE KEYS WHEN WORKING WITH CARBON DRIVE
HANDLING:
Gates Carbon Drive belts are highly durable and offer long life when properly handled. However, caution must be used before and during installation to avoid damaging the carbon tensile cords. Excessive bending and twisting creates invisible crimps, which can lead to belt breakage.
In handling the belt, you must NOT:
– back bend
– use as a chainwhip
– bundle
– crimp
– twist, or
– invert
ALIGNMENT:
Alignment is critical. Depending on the particular bike and setup, you may therefore 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:
Finally, proper belt tension is required for optimum drive operation. For frames with vertical dropouts, changing a flat tire will not mean you need to re-tension your belt. Tensioning is also easy with the Gates Carbon Drive iPhone® app (available for free download in the iTunes® App store) or Carbon Drive Krikit Gauge or the ecotension tester (available in Europe). Unusually low tension can cause the belt to skip, thus leading to decreased performance. But don’t over-tension the belt, because this will cause drag and unnecessary wear.
| TENSIONING RECOMMENDATIONS | SMOOTH & STEADY PEDALING STYLE | PUNCHY & ROUGH PEDALING STYLE |
| MOUNTAIN & SS URBAN | 45-60 Hz (35-45 lbs) | 60-75 Hz (45-53 lbs) |
| INTERNALLY GEARED HUB | 35-50 Hz (28-40 lbs) | 35-50 Hz (28-40 lbs) |
These tension recommendations are a good starting point, which you may need to adjust higher or lower as a result of differing rider size, gear ratios, or power placed on the pedals.
