WD40 contains petroleum distillates which will swell the "o" rings of an "o" ring chain which will then be damaged when you ride the bike. The same goes for the seals on suspension linkages and brake calipers etc. This is why rubber grease and "o" ring suitable chain lube exist. If you need to clean your chain don't ever be tempted to use petrol go with Kerosene. The same goes for cleaning brake calipers etc. even brake cleaner of the cheaper variety will swell the seals. Use a good quality brake cleaner or even mild soapy water and rinse then dry well. You can lube up afterwards with Rubber or silicone grease. Of course if you chain is non "o" ring then none of this matters.
|