GRX 1x12 gravel crankset
Shimano GRX FC-RX820-1 1x Crankset
A single-ring GRX crankset for simple, quiet 1x gravel builds, designed to pair with Shimano's 10-45T and 10-51T 12-speed cassettes. Tooth profiles help hold the chain on rough descents.
Highlights
Why we rate it
Built for 1x
Narrow-wide style tooth profiles help keep the chain on the ring over washboard and rocky descents without a front derailleur.
Pairs with wide cassettes
Designed around Shimano's 12-speed 10-45T and 10-51T cassettes for a big spread of gears.
Light and stiff
Hollowtech II arms keep the crank light while remaining stiff enough for hard efforts out of the saddle.
Tyre clearance
The outboard chainline suits wide gravel tyres and modern frame designs.
Tech specs
Specification
Manufacturer specification. Details may change without notice.
Specification
- Model code
- FC-RX820-1
- Series
- GRX RX820 12-speed
- Speeds
- 1x12
- Chainrings
- 40T, 42T (44T and 46T rings also made)
- Crank lengths
- 160 to 175mm (varies by ring)
- Mount
- 110mm 4-arm
- Q-factor
- 151mm
- Chainline
- 49.7mm
- Axle
- 24mm Hollowtech II
- Weight
- Approx. 644g (40T)
- Recommended cassettes
- CS-M8100 10-45T or 10-51T (12-speed)
Ordering
Available from The Cycle Collective
Available to order through The Cycle Collective in Dorking. For availability, setup or advice, call 0203 148 6764 or email hello@thecyclecollective.cc.
Product Information
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Close all zippers before washing
Wash at max 30°C
Hand washing with cold water (or gentle wash cycle)Using mild, high quality detergent
Drip drying in shade, do not machine dry
Avoiding ironing and bleachThe instructions on your garment’s label
Sorting your clothing by color
Avoiding fabric softener.
Our clothing isn’t meant to be dry cleaned and soaking clothing is not ideal
Storage
Unused sealed sachets should be stored inside the box in a well-ventilated, dry place and protected from moisture, heat and direct sunlight. Can be stored for up to 3 years.
Size
Each sachet contains 30g powder.2 x 30g sachets per carton box.
Makes 2x litres of bike cleaner
100% plastic free packaging
Readily biodegradable ingredients
100% water free
Refill your old bottle and help reduce plastic waste
92% saving in packaging compared to 2 x 1L bike cleaner
100% environmentally friendly ingredients, including plant based raw materials
Supplied in a compostable sachet and printed with vegetable inks
FSC recycled card box containing 2 x sachets – that makes 2L of bike cleaner
Safe on all parts and surfaces including carbon fibre
Will not harm seals, cables, disc brake pads or rotors
Alkaline based and free from alcohol, CFCs, EDTA, solvents or acids
Vegan & vegetarian friendlyCruelty free, not tested on animals
Sachet Instructions
1. Grab your empty old bottle of Muc-Off. (You may need a pair of adjustable pliers to remove the trigger from the bottle). Or purchase our Bottle for Life.
2. Fill up to the shoulders of the bottle with 1 litre of lukewarm water for faster formula activation!
3. Carefully cut one corner of the sachet open along the diagonal cut lines.
4. You can carefully pour the sachet straight into the top of the bottle. Or using the box, fold the inside of the lid together using the printed lines as a guide and use this as a funnel to pour the powder into your bottle. (Please see our video for full instructions on this.
5. Screw your spray trigger back onto the top of the bottle. Ensure it’s tight!
6. Shake the bottle vigorously for 30-60 seconds to activate the formula. If you notice any undissolved powder simply keep shakin’ it!
7. Go clean that filthy bike!
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