You'll still be getting excellent value - only £2 per litre, it's biodegradable and smells nice too.
You can trust Cycling Weekly. Our team of experts put in hard miles testing cycling tech and will always share honest, unbiased advice to help you choose. Find out more about how we test.
Fenwick's FS-1 is a versatile cleaner.
Used at full strength it's an effective degreaser, happily shifting thick grime off chains and sprockets.
Diluted, as recommended, one part to 10 parts water, it's not brilliant, still needing plenty of elbow grease with a stiff brush to break up road grime.
A higher concentration has the desired effect - we tried 1:5, which was much better.
Thank you for reading 20 articles this month* Join now for unlimited access
Enjoy your first month for just £1 / $1 / €1
*Read 5 free articles per month without a subscription
Join now for unlimited access
Try first month for just £1 / $1 / €1