What Our Gearhead(R) Experts Are Saying:"I mixed the Pro X Bio Bike Cleaner Concentrate at the heavy-duty ratio to strip a winter's worth of grime off my drivetrain, and it cut through the buildup without leaving any residue behind. One quart lasted me through the whole season of spray bottle refills."A proper bike wash is its own kind of ritual, the last step before a ride feels fresh again, and the Dumonde Tech Pro X Bio Bike Cleaner Concentrate makes that ritual simple. Mix a batch into a spray bottle or bucket, work it into a grimy drivetrain or a mud-caked frame, and rinse clean knowing nothing harsh is going down the drain or lingering on your hands. The concentrate is 100% biodegradable, non-toxic, and water-soluble, built to be safe on every part of the bike from cables to anodized finishes. It rinses away completely, leaving no residue and no water spots, and a single quart stretches across many refills depending on the dilution ratio used.